阅读说明：本技术 肩部植入部件 (Shoulder implant component ) 是由 小斯图尔特·L·阿克塞尔森 安德鲁·M·迪克森 克里斯廷·维丁 约瑟夫·艾伯特·阿邦德 苏雷 于 2018-01-18 设计创作，主要内容包括：肩部植入系统(100)包括肱骨柄植入物(110)、肱骨颈植入部件(210)、肱骨头植入部件(250)和关节盂植入物(310)。肱骨柄植入物具有联接到其外表面的片(141a,141b,151a,151b),该片相对于垂直方向成角度地向内逐渐变细。片的至少一部分在安装肱骨柄植入物期间形成直接接合并压紧松质骨的楔。肱骨颈植入部件被配置成与肱骨柄植入物联接。肱骨头植入部件被配置成经由肱骨颈植入部件联接到肱骨柄植入物。关节盂植入物具有多个外围栓钉(350)。外围栓钉中的每个具有多组弹性叶(365)。(The shoulder implant system (100) includes a humeral stem implant (110), a humeral neck implant component (210), a humeral head implant component (250), and a glenoid implant (310). The humeral stem implant has a plate (141a,141b,151a,151b) coupled to its outer surface that tapers inwardly at an angle to the vertical. At least a portion of the sheet forms a wedge that directly engages and compresses cancellous bone during installation of the humeral stem implant. The humeral neck implant component is configured to couple with a humeral stem implant. The humeral head implant component is configured to be coupled to the humeral stem implant via a humeral neck implant component. The glenoid implant has a plurality of peripheral pegs (350). Each of the peripheral pegs has a plurality of sets of resilient leaves (365).)

1. A glenoid implant to be coupled with a prepared glenoid of a patient, the glenoid implant comprising:

a body having:

a concave surface configured to engage a humeral head implant component, an

A convex surface configured to engage a mating surface of a prepared glenoid of the patient, the convex surface having a peripheral region surrounding a central region;

a central peg extending from a central region of the convex surface, the central peg configured to adhere to a central aperture of the prepared glenoid of the patient; and

a peripheral peg extending from a peripheral region of the convex surface, the peripheral peg having a first set of resilient leaves at a first longitudinal position of the peripheral peg and a second set of resilient leaves at a second longitudinal position of the peripheral peg spaced apart from the first longitudinal position.

2. The glenoid implant of claim 1, wherein the first set of resilient leaves has a first rotational orientation about the peripheral peg and the second set of resilient leaves has a second rotational orientation about the peripheral peg, the second rotational orientation being angularly offset from the first rotational orientation.

3. The glenoid implant of claim 1, wherein each of the first set of resilient leaves and each of the second set of resilient leaves are configured to deform and deflect upon initial engagement by cortical bone during installation of the glenoid implant in the prepared glenoid, and wherein each of the first set of resilient leaves and each of the second set of resilient leaves are configured to engage cancellous bone of the prepared glenoid after the glenoid implant is finally seated in the prepared glenoid.

4. The glenoid implant of claim 1, wherein the peripheral peg has a maximum outer diameter that is greater than a maximum outer diameter of the central peg.

5. A glenoid implant to be coupled with a prepared glenoid of a patient, the prepared glenoid having a mating surface, a central bore, and a peripheral bore, the glenoid implant comprising:

a body having:

a concave surface configured to engage a humeral head implant component, an

A convex surface configured to engage a mating surface of a prepared glenoid of the patient, the convex surface having a peripheral region surrounding a central region;

a central peg extending from a central region of the convex surface, the central peg configured to adhere to a central aperture of the prepared glenoid of the patient; and

a peripheral peg extending from a peripheral region of the convex surface, the peripheral peg having a first radially extending feature positioned at a first longitudinal position of the peripheral peg and a second radially extending feature positioned at a second longitudinal position of the peripheral peg spaced from the first longitudinal position, the first radially extending feature having three lobes spaced apart around a circumference of the peripheral peg in a first rotational orientation, the second radially extending feature having three lobes spaced apart around the circumference of the peripheral peg in a second rotational orientation, the second rotational orientation being angularly offset from the first rotational orientation.

6. The glenoid implant of claim 5, wherein each of the three leaves of the first radially extending feature and each of the three leaves of the second radially extending feature are configured to deform and deflect upon initial engagement by cortical bone during installation of the glenoid implant in the prepared glenoid, and wherein each of the three leaves of the first radially extending feature and each of the three leaves of the second radially extending feature are configured to engage cancellous bone of the prepared glenoid after the glenoid implant is finally seated in the prepared glenoid.

7. The glenoid implant of claim 5, wherein the central peg has a first length and the peripheral pegs have a second length that is less than the first length.

8. The glenoid implant of claim 7, wherein the peripheral peg has a maximum outer diameter that is greater than a maximum outer diameter of the central peg.

9. The glenoid implant of claim 5, being responsive to coupling of the glenoid implant with the prepared glenoid such that (i) at least a portion of the convex surface directly engages a mating surface of the prepared glenoid, (ii) the central peg is positioned within a central bore of the prepared glenoid, and (iii) the peripheral peg is positioned within a peripheral bore of the prepared glenoid, the first radially extending feature and the second radially extending feature being configured to engage cancellous bone of the prepared glenoid and provide a sufficient amount of self-pressurization such that bone cement between the central peg and the central bore can cure without an external force holding the glenoid implant in place.

10. The glenoid implant of claim 5, further comprising: a third radially extending feature positioned at a third longitudinal position of the peripheral peg spaced from the first and second longitudinal positions, the third radially extending feature having three lobes spaced around a circumference of the peripheral peg in a third rotational orientation that is angularly offset from the first and second rotational orientations.

11. The glenoid implant of claim 5, further comprising: a second peripheral peg extending from a peripheral region of the convex surface, the second peripheral peg having a third radially extending feature positioned at a first longitudinal position of the second peripheral peg and a fourth radially extending feature positioned at a second longitudinal position of the second peripheral peg spaced apart from the first longitudinal position of the second peripheral peg, the third radially extending feature having three lobes spaced apart about a circumference of the second peripheral peg in the first rotational orientation, the fourth radially extending feature having three lobes spaced apart about the circumference of the second peripheral peg in the second rotational orientation.

12. A glenoid implant comprising:

a body having a first side with a concave surface and a second, opposite side with a convex surface configured to engage a prepared glenoid of a patient, the convex surface having a peripheral region surrounding a central region;

a central peg extending from a central region of the convex surface; and

a plurality of peripheral pegs extending from a peripheral region of the convex surface, each of the plurality of peripheral pegs having at least a first set of resilient leaves at a first longitudinal position and a second set of resilient leaves at a second longitudinal position spaced apart from the first longitudinal position.

13. A glenoid implant comprising:

a body having a first side with a concave surface and a second, opposite side with a convex surface configured to engage a prepared glenoid of a patient, the convex surface having a peripheral region surrounding a central region;

a central peg extending from a central region of the convex surface; and

a plurality of peripheral pegs extending from a peripheral region of the convex surface, each of the plurality of peripheral pegs having a plurality of radially extending features, each of the plurality of radially extending features having three lobes spaced around a circumference of a respective one of the plurality of peripheral pegs, the three lobes of a first portion of the plurality of radially extending features having a first rotational orientation, the three lobes of a second portion of the plurality of radially extending features having a second rotational orientation angularly offset from the first rotational orientation, and the three lobes of a third portion of the plurality of radially extending features having a third rotational orientation angularly offset from the first rotational orientation and the second rotational orientation.

14. The glenoid implant of claim 13, wherein for each of the plurality of radially extending features, the three lobes are approximately equally spaced about a circumference of a respective one of the plurality of peripheral pegs.

15. The glenoid implant of claim 13, being responsive to the glenoid implant being coupled with the prepared glenoid such that at least a portion of the convex surface directly engages the prepared glenoid, the plurality of radially extending features being configured to engage cancellous bone of the prepared glenoid and provide a sufficient amount of self-pressurization to enable bone cement between the central peg and the central hole in the prepared glenoid to cure without an external force holding the glenoid implant in place.

16. A glenoid implant to be coupled with a prepared glenoid of a patient, the prepared glenoid having a mating surface, a central bore, and a peripheral bore, the glenoid implant comprising:

a body having:

a concave surface configured to engage a humeral head implant component, an

A convex surface configured to engage a mating surface of the prepared glenoid of the patient, the convex surface having a peripheral region surrounding a central region;

a central peg extending from a central region of the convex surface, the central peg configured to be affixed to a central aperture of the prepared glenoid of the patient; and

a peripheral peg extending from a peripheral region of the convex surface, the peripheral peg having at least one radially extending feature that is responsive to at least a portion of the convex surface directly engaging a mating surface of the prepared glenoid, the at least one radially extending feature of the peripheral peg being configured to engage cancellous bone of the prepared glenoid and provide a sufficient amount of self-pressurization to enable bone cement between the central peg and the central bore to cure with the at least a portion of the convex surface remaining directly engaged with the mating surface of the prepared glenoid without applying an external force to the glenoid implant.

17. The glenoid implant of claim 16, wherein the at least one radially extending feature is at least three radially extending features, each of the at least three radially extending features protruding from a different longitudinal position along a length of the peripheral peg.

18. The glenoid implant of claim 17, wherein each of the at least three radially extending features includes a plurality of lobes.

19. The glenoid implant of claim 18, wherein the plurality of lobes of a first one of the at least three radially extending features has a first rotational orientation about a central axis of the peripheral peg and the plurality of lobes of a second one of the at least three radially extending features has a second rotational orientation about the central axis of the peripheral peg, the second rotational orientation being angularly offset from the first rotational orientation.

20. A method of making a glenoid implant, the method comprising:

providing a femoral glenoid component comprising:

(i) a body having a first side with a concave surface and a second opposing side with a convex surface having a peripheral region surrounding a central region;

(ii) a central peg extending from a central region of the convex surface; and

(iii) a peripheral peg extending from a peripheral region of the convex surface, the peripheral peg having a generally cylindrical portion;

cutting, via at least one of the one or more tools, the substantially cylindrical portion of the peripheral peg, thereby creating a plurality of radially extending discs; and

cutting the created plurality of radially extending disks in one or more helical patterns relative to a central axis of the peripheral peg via at least one of the one or more tools, thereby modifying each of the plurality of radially extending disks to have three lobes spaced around a circumference of the peripheral peg.

21. The method of claim 20, wherein cutting the created plurality of radially extending disks in one or more helical patterns relative to a central axis of the peripheral peg produces the three lobes of a first of the modified plurality of radially extending disks having a first rotational orientation and the three lobes of a second of the modified plurality of radially extending disks having a second rotational orientation that is angularly offset from the first rotational orientation.

22. A method as in claim 20, wherein each of the three leaves is configured to deform and deflect upon initial engagement by cortical bone during installation of the glenoid implant in a prepared glenoid, and wherein each of the three leaves is configured to engage with cancellous bone of the prepared glenoid after the glenoid implant is finally seated in the prepared glenoid.

23. The method of claim 20, wherein the one or more tools comprise a milling machine, a lathe, a burr, a drill, a thread die, a multi-lead thread die, a robotic arm, a chisel, or any combination thereof.

24. A method of installing a glenoid implant in a prepared glenoid of a patient, the prepared glenoid having a mating surface, a central bore, and a plurality of peripheral bores, the method comprising:

providing a glenoid implant comprising:

(i) a body having a first side with a concave surface and a second opposing side with a convex surface having a peripheral region surrounding a central region;

(ii) a central peg extending from a central region of the convex surface; and

(iii) a plurality of peripheral pegs extending from a peripheral region of said convex surface, each of said peripheral pegs having at least one radially extending feature;

applying bone cement to at least a portion of the central peg;

positioning the glenoid implant via at least one of the one or more tools such that:

(i) at least a portion of the convex surface directly engages the mating surface of the prepared glenoid,

(ii) the central peg is positioned within the central aperture of the prepared glenoid, an

(iii) Each of the plurality of peripheral pegs is positioned within a respective one of the peripheral holes of the prepared glenoid;

disengaging at least one of the one or more tools from the glenoid implant prior to curing of the bone cement applied to at least a portion of the central peg; and

maintaining a position of the glenoid implant relative to the prepared glenoid via at least one radially extending feature of the plurality of peripheral pegs during curing of the bone cement.

25. The method of claim 24, further comprising applying bone cement to at least a portion of the convex surface prior to the positioning.

26. The method of claim 24, wherein bone cement is not applied to the plurality of peripheral pegs prior to said positioning.

27. A shoulder implant system comprising:

a humeral stem implant having a plate coupled to an outer surface thereof, the plate tapering inwardly at an angle relative to vertical, at least a portion of the plate forming a wedge that directly engages and compresses cancellous bone during installation of the humeral stem implant;

a humeral neck implant component configured to couple with the humeral stem implant such that a portion of the humeral neck implant component protrudes from the oblique surface of the humeral stem implant;

a humeral head implant component configured to be coupled to a portion of the humeral neck implant component that protrudes from the oblique face of the humeral stem implant; and

a glenoid implant having a concave surface configured to engage the humeral head implant component.

28. A shoulder implant system comprising:

a humeral stem implant having an internal bore;

a humeral neck implant component configured to couple with the humeral stem implant via the internal bore such that a portion of the humeral neck implant component protrudes from the humeral stem implant;

a humeral head implant component configured to be coupled to a portion of the humeral neck implant component that protrudes from the humeral stem implant; and

a glenoid implant having a body with a first side with a concave surface configured to engage the humeral head implant component and a second opposite side with a convex surface configured to engage a prepared glenoid of a patient, the convex surface having a peripheral region surrounding the central region, a central peg extending from the central region of the convex surface, and a peripheral peg extending from the peripheral region of the convex surface, the peripheral peg having a first set of resilient leaves at a first longitudinal location and a second set of resilient leaves at a second longitudinal location spaced apart from the first longitudinal location.

29. The system of claim 28, wherein the first set of resilient leaves has a first rotational orientation about the peripheral peg and the second set of resilient leaves has a second rotational orientation about the peripheral peg, the second rotational orientation being angularly offset from the first rotational orientation.

30. A system as in claim 28, wherein each of the first set of resilient leaves and each of the second set of resilient leaves are configured to deform and deflect upon initial engagement by cortical bone during installation of the glenoid implant in the prepared glenoid, and wherein each of the first set of resilient leaves and each of the second set of resilient leaves are configured to engage with cancellous bone of the prepared glenoid after the glenoid implant is finally seated in the prepared glenoid.

31. The system of claim 28, wherein the humeral stem implant further has a plate coupled to an outer surface thereof, the plate tapering inwardly at an angle relative to vertical, at least a portion of the plate forming a wedge that directly engages and compresses cancellous bone during installation of the humeral stem implant.

32. A humeral stem implant, comprising:

a lower shank portion having a central axis;

an upper shank portion extending from the lower shank portion, the upper shank portion having a tapered face angled relative to a central axis of the lower shank portion;

a first pair of plates extending from an outer surface of the upper stem portion for providing rotational stability to the humeral stem implant by engaging cancellous bone; and

a second pair of plates extending from an outer surface of the upper shaft portion for providing rotational stability to the humeral shaft implant by engaging cancellous bone, the second pair of plates being located generally on an opposite side of the upper shaft portion relative to the first pair of plates.

33. The humeral stem implant of claim 32, wherein at least a portion of each of the first pair of plates forms a respective wedge that directly engages and compresses cancellous bone during installation of the humeral stem implant, and wherein at least a portion of each of the second pair of plates forms a respective wedge that directly engages and compresses cancellous bone during installation of the humeral stem implant.

34. The humeral stem implant of claim 32, wherein each of the first pair of plates and each of the second pair of plates taper inwardly relative to a central axis of the lower stem portion.

35. The humeral stem implant of claim 32, wherein a central axis of a first plate of the first pair of plates is parallel to a central axis of a second plate of the first pair of plates, and wherein a central axis of a first plate of the second pair of plates is parallel to a central axis of a second plate of the second pair of plates.

36. A humeral stem implant, comprising:

a lower shank portion having a central axis;

an upper shank portion extending from the lower shank portion, the upper shank portion having a tapered face angled relative to a central axis of the lower shank portion;

a first pair of parallel blades coupled to a rear portion of an outer surface of the upper handle portion; and

a second pair of parallel plates coupled to a front portion of an outer surface of the upper handle portion,

wherein the first and second pairs of parallel plates are configured to provide rotational stability to the humeral stem implant by directly engaging cancellous bone in a humeral canal of a prepared humerus of a patient in response to the humeral stem implant being seated.

37. A humeral stem implant as claimed in claim 36, in which at least a portion of the posterior surface of each of the first pair of parallel plates forms a wedge, and in which at least a portion of the anterior surface of each of the second pair of parallel plates forms a respective wedge.

38. A humeral stem implant as claimed in claim 36, in which each of the first pair of parallel plates and each of the second pair of parallel plates taper inwardly relative to the central axis of the lower stem portion.

39. A humeral stem implant as claimed in claim 38, in which the inward taper of each of the first pair of parallel plates and the inward taper of each of the second pair of parallel plates extends inwardly in a downward direction from the upper stem portion towards the lower stem portion.

40. A humeral stem implant as claimed in claim 36, in which a first plate of the first pair of parallel plates and a first plate of the second pair of parallel plates taper inwardly at a first angle relative to the central axis of the lower stem portion, and in which a second plate of the first pair of parallel plates and a second plate of the second pair of parallel plates taper inwardly at a second angle relative to the central axis of the lower stem portion.

41. The humeral stem implant of claim 40, wherein the first angle is different than the second angle.

42. The humeral stem implant of claim 36, wherein a first plate of the first pair of parallel plates has a first length and a second plate of the first pair of parallel plates has a second length that is less than half the first length.

43. The humeral stem implant of claim 42, wherein a first plate of the second pair of parallel plates has a third length approximately equal to the first length and a second plate of the second pair of parallel plates has a fourth length approximately equal to the second length.

44. The humeral stem implant of claim 36, wherein each of the first pair of parallel plates forms a respective window therein configured to receive a respective suture therethrough, and wherein each of the second pair of parallel plates forms a respective window therein configured to receive a respective suture therethrough.

45. The humeral stem implant of claim 36, further comprising a bore formed in the upper stem portion extending inwardly from the conical surface, the bore configured to couple with the humeral neck implant component to support a humeral head implant component thereon.

46. A humeral stem implant as claimed in claim 36, further comprising a bio-ingrowth coating attached to the majority of the outer surface of the superior stem portion such that the bio-ingrowth coating extends downwardly from the tapered face at least one millimeter beyond the first and second pairs of parallel plates.

47. A humeral stem implant as set forth in claim 46, wherein the biological ingrowth coating is not attached to the conical surface, the inferior stem portion, the first pair of parallel plates, and the second pair of parallel plates.

48. The humeral stem implant of claim 36, further comprising a notch positioned adjacent to the conical face in the middle portion of the outer surface of the upper stem portion, the notch configured to engage with a tip of a stem extractor tool for removal of the humeral stem implant from the humeral canal of the prepared humerus of the patient after seating therein.

49. A humeral stem implant, comprising:

a lower shank portion having a central axis;

an upper shank portion extending from the lower shank portion, the upper shank portion having a tapered face angled relative to a central axis of the lower shank portion;

a first longitudinal flap having a first central axis and a first length and coupled to a rear portion of the outer surface of the upper handle portion such that the first longitudinal flap forms a first window configured to receive a suture therethrough, the first longitudinal flap tapering inwardly such that the first central axis is at a first angle relative to a central axis of the lower handle portion;

a second longitudinal plate having a second central axis and a second length and coupled to a posterior portion of the outer surface of the upper stem portion such that the second longitudinal plate forms a second window configured to receive a suture therethrough, the second longitudinal plate tapering inwardly such that the second central axis is at a second angle relative to the central axis of the lower stem portion, the second angle being different than the first angle, the second length being less than half the first length, the first and second longitudinal plates being configured to provide rotational stability to the humeral stem implant by directly engaging cancellous bone in response to the humeral stem implant being seated in a humeral canal of a prepared humerus of a patient; and

a bio-ingrowth coating attached to a majority of the outer surface of the upper handle portion such that the bio-ingrowth coating extends at least one millimeter downward from the tapered surface beyond the first longitudinal piece.

50. The humeral stem implant of claim 49, wherein at least a portion of the posterior surface of the first longitudinal plate is tapered to form a wedge that directly engages and compresses cancellous bone during installation of the humeral stem implant.

51. A humeral stem implant as claimed in claim 49, in which the taper of the first longitudinal plate and the taper of the second longitudinal plate extend inwardly in a downward direction from the upper stem portion towards the lower stem portion.

52. The humeral stem implant of claim 49, wherein the lower stem portion is configured to extend into a transition region between the metaphysis and diaphysis of the patient's prepared humerus in response to the humeral stem implant being seated in the humeral canal and the conical surface of the upper stem portion being substantially flush with the osteotomy cut of the prepared humerus.

53. The humeral stem implant of claim 52, wherein the lower stem portion is configured such that it does not contact cortical bone of the prepared humerus of the patient in response to the humeral stem implant being seated in the humeral canal and a conical surface of the upper stem portion being substantially flush with an osteotomy cut of the prepared humerus.

54. The humeral stem implant of claim 49, further comprising:

a third longitudinal flap having a third central axis and a third length and coupled to the front portion of the outer surface of the upper handle portion such that the third longitudinal flap forms a third window configured to receive a suture therethrough, the third length being substantially the same as the first length of the first longitudinal flap, the third longitudinal flap tapering inwardly such that the third central axis is at a first angle relative to the central axis of the lower handle portion;

a fourth longitudinal plate having a fourth central axis and a fourth length and coupled to the anterior portion of the outer surface of the upper stem portion such that the fourth longitudinal plate forms a fourth window configured to receive a suture therethrough, the fourth length being substantially the same as the second length of the second longitudinal plate, the fourth longitudinal plate tapering inwardly such that the fourth central axis is at the second angle relative to the central axis of the lower stem portion, the third and fourth longitudinal plates configured to further provide rotational stability to the humeral stem implant by directly engaging cancellous bone in response to the humeral stem implant being seated in the humeral canal of the prepared humerus of the patient.

55. A humeral stem implant as set forth in claim 49, wherein the first longitudinal plate is coupled to the posterior portion of the outer surface of the upper stem portion at three different locations such that the first longitudinal plate forms the first and third windows.

56. The humeral stem implant of claim 49, further comprising a bore formed in the upper stem portion that extends inwardly from the conical surface, the bore configured to couple with a first end of a humeral neck implant component, a second, opposite end of the humeral neck implant component configured to couple with a humeral head implant component.

57. A humeral stem implant as set forth in claim 49 wherein the bio-ingrowth coating is not attached to the conical surface, the lower stem portion, the first longitudinal plate, and the second longitudinal plate.

58. The humeral stem implant of claim 49, wherein the biological ingrowth coating is a porous coating configured to promote bone ingrowth.

59. A humeral stem implant, comprising:

a lower shank portion having a central axis;

an upper shank portion extending from the lower shank portion, the upper shank portion having a tapered face angled relative to a central axis of the lower shank portion;

an elongate plate coupled to an outer surface of the upper stem portion, the elongate plate tapering inwardly at an angle relative to a central axis of the lower stem portion, at least a portion of the elongate plate forming a wedge that directly engages and compresses cancellous bone during installation of the humeral stem implant.

60. A humeral stem implant as set forth in claim 59, further comprising a second elongate plate coupled to an exterior surface of the upper stem portion.

61. A humeral stem implant as set forth in claim 60, wherein the elongate plate and the second elongate plate are both coupled to the posterior or anterior portion of the outer surface of the upper stem portion.

62. A humeral stem implant as set forth in claim 61, wherein the length of the second elongate plate is less than half the length of the elongate plate.

63. A humeral stem implant as set forth in claim 61, wherein the second elongate plate tapers inwardly at a second angle relative to a central axis of the lower stem portion, the second angle being different than the angle.

64. The humeral stem implant of claim 63, wherein the elongate plate and the second elongate plate provide rotational stability to the humeral stem implant by directly engaging the cancellous bone in a humeral canal of a prepared humerus of a patient in response to the humeral stem implant being seated.

65. A humeral stem implant as claimed in claim 59, in which the elongate plate tapers inwardly in a downward direction from the upper stem portion towards the lower stem portion.

66. A humeral stem implant as claimed in claim 60, in which an elongate plate is coupled to the posterior of the outer surface of the upper stem portion and the second elongate plate is coupled to the anterior of the outer surface of the upper stem portion.

67. A humeral stem implant as set forth in claim 66, wherein the length of the second elongate plate is approximately equal to the length of the elongate plate.

Technical Field

The present disclosure relates generally to shoulder implant systems and, more particularly, to a shoulder implant system having a humeral stem implant and a glenoid implant.

Background

A person experiencing shoulder pain may be alleviated by a shoulder replacement procedure that replaces one or more portions of the human anatomy with one or more implant components. In some such cases, an upper portion of a patient's humerus (e.g., a portion of a humeral head) is cut. The humerus is then cored and prepared to receive a stem implant therein. Some existing stem implants have a relatively long body that enters the diaphyseal region of the humerus to help align the stem implant during installation, and can thus end up undesirably engaging cortical bone.

The stem implant is inserted/installed in the prepared humerus and coupled with the humeral neck implant component and the humeral head implant component, so the combination typically replaces the native humeral head of the patient's humerus.

In some patients, the glenoid of the patient is replaced with a glenoid implant such that the humeral head implant component addresses arm movement of the patient. Previous glenoid implants typically required the patient's glenoid to be prepared by scraping a surface and drilling a set of holes or holes therein to receive pegs of the glenoid implant to help hold the glenoid implant in place. The glenoid implant is typically cemented in place by the surgeon positioning the glenoid implant in place and holding it there until the bone cement cures.

The present disclosure is directed to addressing and/or ameliorating the above-identified deficiencies and addressing other issues.

Disclosure of Invention

According to some embodiments of the present disclosure, a humeral stem implant includes a lower stem portion, an upper stem portion, a first pair of plates, and a second pair of plates. The lower handle portion has a central axis. The upper shank portion extends from the lower shank portion and has a tapered surface that is angled relative to a central axis of the lower shank portion. A first pair of plates extends from an outer surface of the upper stem portion for providing rotational stability to the humeral stem implant by engaging cancellous bone. The second pair of plates extends from an outer surface of the upper stem portion for providing rotational stability to the humeral stem implant by engaging cancellous bone. The second pair of tabs is located generally on an opposite side of the upper handle portion relative to the first pair of tabs.

According to some embodiments of the present disclosure, a humeral stem implant includes a lower stem portion, an upper stem portion, a first pair of parallel plates, and a second pair of parallel plates. The lower handle portion has a central axis. The upper shank portion extends from the lower shank portion and has a tapered surface that is angled relative to a central axis of the lower shank portion. A first pair of parallel blades is coupled to a rear portion of the outer surface of the upper handle portion. A second pair of parallel blades is coupled to a forward portion of the outer surface of the upper handle portion. The first and second pairs of parallel plates are configured to provide rotational stability to the humeral stem implant by directly engaging cancellous bone in response to the humeral stem implant being seated in the humeral canal of a prepared humerus of a patient.

According to some embodiments of the present disclosure, a humeral stem implant includes a lower stem portion, an upper stem portion, a first longitudinal plate, a second longitudinal plate, and a biological ingrowth coating. The lower handle portion has a central axis. The upper shank portion extends from the lower shank portion and has a tapered surface that is angled relative to a central axis of the lower shank portion. The first longitudinal flap has a first central axis and a first length and is coupled to a rear portion of the outer surface of the upper handle portion such that the first longitudinal flap forms a first window configured to receive a suture therethrough. The first longitudinal tab tapers inwardly such that the first central axis is at a first angle relative to a central axis of the lower handle portion. The second longitudinal flap has a second central axis and a second length and is coupled to a rear portion of the outer surface of the upper handle portion such that the second longitudinal flap forms a second window configured to receive a suture therethrough. The second longitudinal flap tapers inwardly such that the second central axis is at a second angle relative to the central axis of the lower handle portion. The second angle is different from the first angle. The second length is less than half the first length. The first and second longitudinal pieces are configured to provide rotational stability to the humeral stem implant by directly engaging cancellous bone in response to the humeral stem implant being seated in a humeral canal of a prepared humerus of a patient. The bio-ingrowth coating is attached to a majority of the outer surface of the upper handle portion such that the bio-ingrowth coating extends at least one millimeter downward from the tapered surface beyond the first longitudinal fin.

According to some embodiments of the present disclosure, a humeral stem implant includes a lower stem portion, an upper stem portion, and an elongate plate. The lower handle portion has a central axis. The upper shank portion extends from the lower shank portion and has a tapered surface that is angled relative to a central axis of the lower shank portion. An elongate plate is coupled to the outer surface of the upper handle portion. The elongate blade tapers inwardly at an angle relative to the central axis of the lower shank portion. At least a portion of the elongate sheet forms a wedge that directly engages and compresses cancellous bone during installation of the humeral stem implant.

According to some embodiments of the present disclosure, a glenoid implant to be coupled with a prepared glenoid of a patient includes a body, a central peg, and a peripheral peg. The body has a concave surface configured to engage a humeral head implant component and a convex surface configured to engage a mating surface of a prepared glenoid of a patient. The convex surface has a peripheral region surrounding a central region. A central peg extends from a central region of the convex surface. The central peg is configured to adhere to the central aperture of the prepared glenoid of the patient. A peripheral peg extends from a peripheral region of the convex surface. The peripheral peg has a first set of resilient leaves at a first longitudinal position of the peripheral peg and a second set of resilient leaves at a second longitudinal position of the peripheral peg spaced from the first longitudinal position.

According to some embodiments of the present disclosure, a glenoid implant to be coupled with a prepared glenoid of a patient is provided. The prepared glenoid has a mating surface, a central aperture, and a peripheral aperture. The glenoid implant includes a body, a central peg, and a peripheral peg. The body has a concave surface configured to engage a humeral head implant component and a convex surface configured to engage a mating surface of a prepared glenoid of a patient. The convex surface has a peripheral region surrounding a central region. A central peg extends from a central region of the convex surface. The central peg is configured to adhere to the central aperture of the prepared glenoid of the patient. A peripheral peg extends from a peripheral region of the convex surface. The peripheral peg has a first radially extending feature positioned at a first longitudinal position of the peripheral peg and a second radially extending feature positioned at a second longitudinal position of the peripheral peg spaced from the first longitudinal position. The first radially extending feature has three lobes spaced around the circumference of the peripheral peg in a first rotational orientation. The second radially extending feature has three lobes spaced around a circumference of the peripheral peg in a second rotational orientation that is angularly offset from the first rotational orientation.

According to some embodiments of the present disclosure, a glenoid implant includes a body, a central peg, and a plurality of peripheral pegs. The body has a first side with a concave surface and a second opposite side with a convex surface. The convex surface is configured to engage a prepared glenoid of a patient. The convex surface has a peripheral region surrounding a central region. A central peg extends from a central region of the convex surface. A plurality of peripheral pegs extend from a peripheral region of the convex surface. Each of the plurality of peripheral pegs has at least a first set of resilient leaves at a first longitudinal position and a second set of resilient leaves at a second longitudinal position spaced from the first longitudinal position.

According to some embodiments of the present disclosure, a glenoid implant includes a body, a central peg, and a plurality of peripheral pegs. The body has a first side with a concave surface and a second opposite side with a convex surface. The convex surface is configured to engage a prepared glenoid of a patient. The convex surface has a peripheral region surrounding a central region. A central peg extends from a central region of the convex surface. A plurality of peripheral pegs extend from a peripheral region of the convex surface. Each of the plurality of peripheral pegs has a plurality of radially extending features. Each of the plurality of radially extending features has three lobes spaced around a circumference of a respective one of the plurality of peripheral pegs. Three lobes of the first portion of the plurality of radially extending features have a first rotational orientation. The three lobes of the second portion of the plurality of radially extending features have a second rotational orientation that is angularly offset from the first rotational orientation. The three lobes of the third portion of the plurality of radially extending features have a third rotational orientation that is angularly offset from the first rotational orientation and the second rotational orientation.

According to some embodiments of the present disclosure, a glenoid implant to be coupled with a prepared glenoid of a patient is provided. The prepared glenoid has a mating surface, a central aperture, and a peripheral aperture. The glenoid implant includes a body, a central peg, and a peripheral peg. The body has a concave surface configured to engage a humeral head implant component and a mating surface convex surface configured to engage a prepared glenoid of a patient. The convex surface has a peripheral region surrounding a central region. A central peg extends from a central region of the convex surface. The central peg is configured to be affixed to the central aperture of the prepared glenoid of the patient. A peripheral peg extends from a peripheral region of the convex surface. The peripheral peg has at least one radially extending feature. In response to at least a portion of the convex surface directly engaging the mating surface of the prepared glenoid, the at least one radially extending feature of the peripheral peg is configured to engage cancellous bone of the prepared glenoid and provide a sufficient amount of self-pressurization to enable the bone cement between the central peg and the central bore to cure while the at least a portion of the convex surface remains directly engaged with the mating surface of the prepared glenoid without applying an external force to the glenoid implant.

According to some embodiments of the present disclosure, a method of making a glenoid implant includes providing a femoral glenoid component. The femoral glenoid component includes a body, a central peg, and a peripheral peg. The body has a first side with a concave surface and a second opposite side with a convex surface. The convex surface has a peripheral region surrounding a central region. A central peg extends from a central region of the convex surface. A peripheral peg extends from a peripheral region of the convex surface. The peripheral peg has a generally cylindrical portion. The generally cylindrical portion of the peripheral peg is cut via at least one of the one or more tools, thereby creating a plurality of radially extending discs. Cutting the created plurality of radially extending disks in one or more helical patterns relative to a central axis of the peripheral peg via at least one of the one or more tools, thereby modifying each of the plurality of radially extending disks to have three lobes spaced around a circumference of the peripheral peg.

According to some embodiments of the present disclosure, a method of installing a glenoid implant in a prepared glenoid of a patient is described. The prepared glenoid has a mating surface, a central aperture, and a plurality of peripheral apertures. The method includes providing a glenoid implant. A glenoid implant is provided that includes a body, a central peg, and a plurality of peripheral pegs. The body has a first side with a concave surface and a second opposite side with a convex surface. The convex surface has a peripheral region surrounding a central region. A central peg extends from a central region of the convex surface. A plurality of peripheral pegs extend from a peripheral region of the convex surface. Each of the peripheral pegs has at least one radially extending feature. Applying bone cement to at least a portion of the central peg. Positioning, via at least one of the one or more tools, the glenoid implant such that: (i) at least a portion of the convex surface directly engages a mating surface of the prepared glenoid, (ii) the central peg is positioned within the central aperture of the prepared glenoid, and (iii) each of the plurality of peripheral pegs is positioned within a respective one of the peripheral apertures of the prepared glenoid. At least one of the one or more tools is detached from the glenoid implant prior to curing of the bone cement applied to at least a portion of the central peg. During the cement curing, the position of the glenoid implant relative to the prepared glenoid is maintained via the at least one radially extending feature of the plurality of peripheral pegs.

According to some embodiments of the present disclosure, a shoulder implant system includes a humeral stem implant, a humeral neck implant component, a humeral head implant component, and a glenoid implant. The humeral stem implant has a plate coupled to its outer surface. The tabs taper inwardly at an angle to the vertical. At least a portion of the sheet forms a wedge that directly engages and compresses cancellous bone during installation of the humeral stem implant. The humeral neck implant component is configured to couple with the humeral stem implant such that a portion of the humeral neck implant component protrudes from the oblique surface of the humeral stem implant. The humeral head implant component is configured to be coupled to a portion of the humeral neck implant component that protrudes from the oblique face of the humeral stem implant. The glenoid implant has a concave surface configured to engage a humeral head implant component.

According to some embodiments of the present disclosure, a shoulder implant system includes a humeral stem implant, a humeral neck implant component, a humeral head implant component, and a glenoid implant. The humeral stem implant has an internal bore. The humeral neck implant component is configured to couple with the humeral stem implant via the internal bore such that a portion of the humeral neck implant component protrudes from the humeral stem implant. The humeral head implant component is configured to be coupled to a portion of the humeral neck implant component that protrudes from the humeral stem implant. The glenoid implant has a body, a central peg, and a peripheral peg. The body has a first side with a concave surface and a second opposite side with a convex surface. The concave surface is configured to engage a humeral head implant component. The convex surface is configured to engage a prepared glenoid of a patient. The convex surface has a peripheral region surrounding a central region. A central peg extends from a central region of the convex surface and a peripheral peg extends from a peripheral region of the convex surface. The peripheral peg has a first set of resilient leaves at a first longitudinal position and a second set of resilient leaves at a second longitudinal position spaced from the first longitudinal position.

Additional aspects and embodiments of the present disclosure will be apparent to those of ordinary skill in the art in view of the detailed description of the various embodiments, which proceeds with reference to the accompanying drawings, a brief description of which is provided below.

While this disclosure is susceptible of embodiment in many different forms, there is shown in the drawings and will herein be described in detail preferred embodiments of the disclosure with the understanding that the present disclosure is to be considered as an exemplification of the principles of the disclosure and is not intended to limit the broad aspect of the disclosure to the embodiments illustrated.

Referring generally to fig. 1A-2B, the shoulder implant system 100 includes a humeral stem implant 110, a humeral neck implant component 210, a humeral head implant component 250, and a glenoid implant 310. Typically, the humeral stem implant 110 is installed/implanted in a prepared humerus of a patient such that a portion of the humeral stem implant 110 (e.g., the conical surface 132 shown in fig. 7A) remains exposed for coupling with the first end 212A (fig. 2A and 2B) of the humeral neck implant component 210. As such, the second opposing end 212B of the humeral neck implant component 210 is exposed and protrudes such that the humeral head implant component 250 can be coupled thereto (best shown in fig. 1B).

The humeral neck implant component 210 has a first end 212a, a second end 212B, a central portion 214, and a through-hole 220 (best shown in fig. 1B). The first end 212a has a generally tapered cylindrical shape such that the humeral neck implant component 210 can mate with the internal bore 135 of the humeral stem implant 110 in a taper-locking configuration (e.g., morse taper lock). Specifically, the first end 212a is positioned along the central axis X of the humeral neck implant component 210_NIn a direction that tapers inwardly from the central portion 214 toward the first end 212 a. Similarly, the second end 212b has a generally tapered cylindrical shape such that the humeral neck implant component 210 can mate with the humeral head implant component 250 in a taper locking configuration (e.g., morse taper lock). Specifically, the second end 212b is positioned along the central axis X of the humeral neck implant component 210_NIn a direction that tapers inwardly from the central portion 214 toward the second end 212 b.

As shown, the second end 212b has a relatively larger outer maximum diameter than the first end 212a, although the opposite is contemplated. In some such embodiments, the difference in the outer maximum diameters of the first and second ends 212a, 212b facilitates proper coupling of the humeral neck implant component 210 with the humeral stem implant 110 and the humeral head implant component 250.

The through-hole 220 of the humeral neck implant component 210 allows a tool to be positioned therethrough to facilitate removal of the humeral neck implant component 210 from engagement (e.g., a taper lock engagement) with the humeral stem implant 110. In some alternative embodiments, the humeral neck implant component 210 does not include a through hole 220.

While the humeral neck implant component 210 is shown as having a particular shape (i.e., generally cylindrical) and size, it is contemplated that the humeral neck implant component 210 can have a variety of other shapes and/or sizes. For example, the humeral neck implant component 210 can have a non-rotational shape, e.g., a generally rectangular cuboid shape, a generally trilobal cross-section, a generally triangular cross-section, or the like, or any combination thereof.

The humeral head implant component 250 has a generally convex outer surface 255 (best shown in fig. 2A), a generally planar inner surface 260 (best shown in fig. 2B), an internal bore 270 (best shown in fig. 2B), and an external flange 280 (best shown in fig. 1B). The generally convex outer surface 255 has a generally hemispherical shape and is used to engage the corresponding concave surface 322 of the glenoid implant 310 (fig. 2B) during operation of the shoulder implant system 100 in a patient.

The internal bore 270 of the humeral head implant component 250 is used to engage the second end 212b of the humeral neck implant component 210 in a taper locking configuration (e.g., morse taper lock) as described above. Thus, as shown in fig. 1B, the internal bore 270 also lies along the central axis X of the humeral neck implant component 210_NIn a direction tapering inwardly from the central portion 214 toward the second end 212 b.

The generally planar inner surface 260 is set back (i.e., recessed) from the edge 285 of the external flange 280 (fig. 1B) so that the generally planar inner surface 260 does not directly engage or otherwise contact the humeral stem implant 110 (i) during installation of the humeral head implant component 250 onto the humeral neck implant component 210, which can prevent a taper lock from being secured therebetween, and/or (ii) when the humeral head implant component 250 is fully engaged with or fully seated on the humeral neck implant component 210. In some such embodiments, the internal bore 270 of the humeral head implant component 250 and the second end 212b of the humeral neck implant component 210 are configured such that a gap G is maintained between the generally planar inner surface 260 and the conical surface 132 (fig. 7A) of the humeral stem implant 110. The gap G can be, for example, about half a millimeter to about 3 millimeters, about half a millimeter to about 2 millimeters, about half a millimeter to about one millimeter, and the like. In some embodiments, the gap G also provides space so that the humeral head implant component 250 can move (e.g., bend, tilt, etc.) relative to the humeral stem implant 110 when installed in a patient.

Referring generally to fig. 3-4G, glenoid implant 310 includes a body 320, a central peg 330, and three peripheral pegs 350 (although any number of peripheral pegs are contemplated, e.g., one peripheral peg, two peripheral pegs, four peripheral pegs, five peripheral pegs, etc.). The body 320 of the glenoid implant 310 has an irregular shape that generally corresponds to the shape of the natural glenoid cavity or natural glenoid fossa of the patient's scapula. In some embodiments, the cross-sectional shape of the body 320 is generally egg-shaped.

The body 320 has a transversely facing concave surface 322 (best shown in fig. 2B) for engaging the humeral head implant component 250. The body 320 also has an inwardly facing convex surface 324 (best shown in fig. 3) for engaging a mating surface of a patient's prepared glenoid (e.g., a patient's scraped and/or drilled glenoid cavity). The convex surface 324 generally has a peripheral region 325b surrounding a central region 325 a. Central region 325a includes the geometric center of convex surface 324 and a portion of convex surface 324 surrounding the geometric center. In some embodiments, central region 325a comprises about 5% to about 30% of the total surface area of convex surface 324, and peripheral region 325b is balanced. In some embodiments, central region 325a comprises about 10% to about 25% of the total surface area of convex surface 324, and peripheral region 325b is balanced. In some embodiments, central region 325a comprises about 15% to about 20% of the total surface area of convex surface 324, and peripheral region 325b is balanced. The central region 325a is shown as a generally circular region surrounding the central peg 330, but the central region 325a can have any shape (e.g., oval, square, triangular, polygonal, etc., or any combination thereof). The body 320 of the glenoid implant 310 also has an edge surface 326 that extends between the concave surface 322 and the convex surface 324. The edge surface 326 varies based on the thickness of the body 320.

Glenoid implant 310 is a single, unitary component. In some embodiments, glenoid implant 310 is milled from a solid piece of material. In some other embodiments, glenoid implant 310 is made from a 3D printer that prints glenoid implant 310 as a single, integral component. Alternatively, glenoid implant 310 is not monolithic. In some such alternative embodiments, the body 320 of the glenoid implant 310 is the first component to be connected to the central peg 330 and the peripheral peg 350, respectively, as separate components. Glenoid implant 310 may be made of any material, such as plastic (e.g., polyethylene, high density polyethylene, ultra-high density polyethylene, etc.), metal (e.g., stainless steel, nickel, titanium, etc.), ceramic, or any combination thereof.

The central peg 330 has a central axis X_C(fig. 3), and each of the three peripheral pegs 350 has a respective central axis X_P1、X_P2And X_P3(FIG. 3). Center axis X_CGenerally parallel to the central axis X_P1、X_P2And X_P3Such that glenoid implant 310 can be installed in a single medial orientation, such that central peg 330 and three peripheral pegs 350 enter and engage corresponding holes drilled in the prepared glenoid of the patient at approximately the same time (e.g., central peg 330 enters first due to its relatively large height/length).

The central peg 330 has a cylindrical body 331. Cylindrical body 331 has a first end integral with body 320 of glenoid implant 310 and a second opposite end forming a rounded and/or tapered tip portion 332 of center peg 330. The tip portion 332 of the center peg 330 helps the center peg 330 engage and enter a center hole (not shown) in the prepared glenoid during installation of the glenoid implant 330.

The central peg 330 has a plurality of tabs 340 extending from the cylindrical body 331 of the central peg 330. When the glenoid implant 310 is installed (e.g., thereby positioning the central peg 330 in the central bore of the patient's prepared glenoid), the sheet 340 is rigid and does not bend or deflect or deform or otherwise move relative to the cylindrical body 331. The tabs 340 are spaced along the length/height of the cylindrical body 331 and around the circumference of the cylindrical body 331 such that one or more channels 342 (e.g., two vertical channels, three vertical channels, etc.) are formed between the tabs 340. The tabs 340 and channels 342 provide surfaces, grooves, and/or undercuts (undercuts) for engaging and/or retaining bone cement (not shown) for securing the central peg 330 to the central bore of the prepared glenoid of a patient.

In some embodiments, the inner diameter of the central bore of the prepared glenoid is greater than the largest outer diameter of the central peg 330 (including the tab 340). As such, a relatively large cement shell may be formed, thereby facilitating rigid coupling of the central peg 330 to the central bore of the prepared glenoid of the patient. In some alternative embodiments, the inner diameter of the central bore of the prepared glenoid is about equal to or slightly less than the maximum outer diameter of the central peg 330 (including the tab 340). In some such alternative embodiments, the tabs 340 are engaged through a central aperture and slightly compressed, but the tabs 340 generally do not bend or deflect or deform or otherwise move relative to the cylindrical body 331.

The central peg 330 has a height/length and a maximum outer diameter. In some embodiments, the height of the central peg 330 is about 5 millimeters to about 30 millimeters. In some other embodiments, the height of the central peg 330 is about 10 millimeters to about 25 millimeters. In some embodiments, the height of the central peg 330 is about 15 millimeters. In some embodiments, the maximum outer diameter of the central peg 330 (including the tabs 340) is about 1 mm to about 8 mm. In some other embodiments, the maximum outer diameter of the central peg 330 is about 2 millimeters to about 6 millimeters. In some other embodiments, the maximum outer diameter of the central peg 330 is about 3 millimeters to about 5 millimeters.

Similar to the central peg 330, each of the peripheral pegs 350 has a cylindrical body 351. Cylindrical body 351 has a first end integral with body 320 of glenoid implant 310 and a second, opposite end forming a rounded and/or tapered tip portion 352 (best shown in fig. 4A) of peripheral peg 350. The tip portions 352 of the peripheral pegs 350 help the peripheral pegs 350 engage and enter corresponding peripheral holes (not shown) in the prepared glenoid during installation of the glenoid implant 330.

Each of the peripheral pegs 350 has a plurality of radially extending features 360 (fig. 3) extending from the cylindrical body 351 of the peripheral peg 350. As best shown in fig. 4A, each of the peripheral pegs 350 has four radially extending features 360 a-360 d extending from the cylindrical body 351, but each of the peripheral pegs 350 may have any number of radially extending features 360 (e.g., one radially extending feature, two radially extending features, three radially extending features, five radially extending features, etc.). Four radially extending features 360 are positioned at four longitudinal locations of the cylindrical body 351 of the peripheral peg 350.

Specifically, as shown in fig. 4A, a first one of the radially extending features 360a is positioned at a first longitudinal position of the peripheral peg 350 that is closest to the convex surface 324 (fig. 3) of the body 320 of the glenoid implant 310. A second one of the radially extending features 360b is positioned at a second longitudinal position of the peripheral peg 350 directly adjacent to the first radially extending feature 360a and more distal than the first radially extending feature 360 a. A third one of the radially extending features 360c is positioned at a third longitudinal position of the peripheral peg 350 directly adjacent to the second radially extending feature 360b and more distal than the first and second radially extending features 360a, 360 b. A fourth of the radially extending features 360d is positioned at a fourth longitudinal position of the peripheral peg 350 directly adjacent to the third radially extending feature 360c and more distal than the first, second, and third radially extending features 360a, 360b, 360 c. Further, the radially extending features 360 a-360 d are spaced apart from one another along the cylindrical body 351 of the peripheral peg 350 such that a portion of the cylindrical body 351 is exposed between the radially extending features 360 a-360 d. Thus, the radially extending features 360 have play to bend and/or deflect.

Each of the radially extending features 360 has a plurality of lobes 365. As best shown in fig. 5A, which shows radially extending features 360 a-360 d exploded from the cylindrical body 351 for illustrative purposes, each of the radially extending features 360 a-360 d has three lobes 365 spaced around the circumference of the cylindrical body 351. Each of the leaves 365 is deflectable and flexible and resilient such that each of the leaves 365 bends or deflects relative to the cylindrical body 351 when the glenoid implant 310 is installed (e.g., when the peripheral pegs 350 are positioned in corresponding peripheral holes of a prepared glenoid of a patient). In some such embodiments, each of the leaves 365 deflects and/or deforms when engaged with cortical bone of the patient's prepared glenoid during installation.

The lobes 365 are spaced apart around the circumference of the cylindrical body 351 such that one or more channels 370 are formed between the lobes 365. As best shown in fig. 4A and 5A-5B, the one or more channels 370 includes three channels, wherein each of the three channels 370 has a central axis X that surrounds the peripheral peg 350_P1Is provided. Further, the lobes 365 of each radially extending feature 360 are angularly offset from the lobes 365 of each immediately adjacent radially extending feature 360, which contributes to the generally helical shape of the channel 370.

As best shown in fig. 4D-4G by cross-sectional views of each of the four radially extending features 360 a-360D shown in fig. 4B, a first radially extending feature 360a (fig. 4D) has three lobes 365a₁、365a₂And 365a₃The three leaves 365a₁、365a₂And 365a₃Having a central axis X around_P1In a first rotational orientation. The second radially extending feature 360b (FIG. 4E) has three lobes 365b₁、365b₂And 365b₃The three leaves 365b₁、365b₂And 365b₃Having a central axis X around_P1Wherein the second rotational orientation (fig. 4E) is angularly offset from the first rotational orientation (fig. 4D). The third radially extending feature 360c (FIG. 4F) has three lobes 365c₁、365c₂And 365c₃The three leaves 365c₁、365c₂And 365c₃Having a central axis X around_P1Wherein the third rotational orientation (fig. 4F) is angularly offset from the first rotational orientation (fig. 4D) and the second rotational orientation (fig. 4E). The fourth radially extending feature 360d (FIG. 4G) has three lobes 365d₁、365d₂And 365d₃The three leaves 365d₁、365d₂And 365d₃Having a central axis X around_P1Wherein the fourth rotational orientation (fig. 4G) is angularly offset from the first rotational orientation (fig. 4D), the second rotational orientation (fig. 4E), and the third rotational orientation (fig. 4F). For a cable having a central point extending through respective threeEach of the middle three dashed radially extending features 360 a-360 d of each of the lobes highlights/shows the rotational orientation.

Referring to fig. 5B, an enlarged view of one of the radially extending features 360 is shown, exploded from the cylindrical body 351 to better illustrate the radially extending features 360 and the lobes 365. As shown, each of the lobes 365 has an upper surface 366a, an opposing lower surface 366b, an outer edge surface 366c, and a common side surface 366 d. The shared side surface 366d is shared between two immediately adjacent lobes 365. Further, a common side surface 366d is defined by the helical channel 370.

The lobes 360 and the helical channel 370 provide surfaces, grooves, and/or undercuts for engaging and/or retaining bone cement (not shown) for securing the peripheral peg 350 into a peripheral hole (not shown) in the prepared glenoid of a patient. In some embodiments, the peripheral peg 350 is not secured into the peripheral hole with bone cement. Rather, in some such embodiments, the radially extending features 360 engage cancellous bone of the prepared glenoid and provide a sufficient amount of retention and/or compression such that no bone cement is required between the peripheral pegs 350 and the peripheral holes in the prepared glenoid of the patient.

As best shown in fig. 3, each of the peripheral pegs 350 has a height/length and a maximum outer diameter. The height of each of the peripheral pegs 350 is less than the height of the central peg 330. In some embodiments, the height of each of the peripheral pegs 350 is less than 75% of the height of the central peg 330. In some embodiments, the height of each of the peripheral pegs 350 is less than 60% of the height of the central peg 330. In some embodiments, the height of each of the peripheral pegs 350 is less than 50% of the height of the central peg 330. In some embodiments, the height of each of the peripheral pegs 350 is from 2 millimeters to about 20 millimeters. In some other embodiments, each of the peripheral pegs 350 has a height of 5 mm to about 15 mm. In some embodiments, the height of each of the peripheral pegs 350 is about 8 millimeters.

In some embodiments, the maximum outer diameter of each of the peripheral pegs 350 (including the radially extending features 360) is greater than the maximum outer diameter of the central peg 330 (including the tabs 340) (e.g., 5% greater, 10% greater, 15% greater, 20% greater, 30% greater, 50% greater, etc.). In some embodiments, the maximum outer diameter of each of the peripheral pegs 350 (including the radially extending features 360) is about 1 mm to about 15 mm. In some other embodiments, the maximum outer diameter of each of the peripheral pegs 350 (including the radially extending features 360) is about 3 millimeters to about 8 millimeters. In some other embodiments, the maximum outer diameter of each of the peripheral pegs 350 (including the radially extending features 360) is about 4 to about 6 millimeters. In some embodiments, the outer diameter of the cylindrical body 351 of each peripheral peg 350 is greater than the outer diameter of the cylindrical body 331 of the central peg 330 (e.g., 5% greater, 10% greater, 15% greater, 20% greater, 30% greater, 50% greater, etc.).

A method of installing the glenoid implant 310 of the present disclosure into a prepared glenoid of a patient will now be described. First, the native glenoid is prepared for the patient's native glenoid using techniques and/or tools to shave such that the mating or outer surface of the native glenoid generally corresponds to the convex surface 324 of the glenoid implant 310. The preparation also includes drilling a central hole in the natural glenoid that receives the central peg 330. The preparation also includes drilling a set of peripheral holes in the native glenoid that receive a respective one of the three peripheral pegs 350 using, for example, a drill guide. With the natural glenoid so prepared, the glenoid implant 310 is ready for installation.

Bone cement is applied to at least a portion of the central peg 330. Bone cement may also be applied to at least a portion of convex surface 324, but in some embodiments, bone cement is not applied to convex surface 324. Further, bone cement may also be applied to at least a portion of one or more peripheral pegs 350, but in some embodiments, bone cement is not applied to any peripheral pegs 350.

With the bone cement applied to at least a portion of the central peg 330, the glenoid implant 310 is held using a tool, the glenoid implant 310 being fully installed/seated in the prepared glenoid, wherein the glenoid implant is positioned such that (1) at least a portion of the convex surface 324 directly engages a mating surface of the prepared glenoid, (2) the central peg 330 is positioned within a central aperture of the prepared glenoid, and (3) each of the three peripheral pegs 350 is positioned within a respective one of the peripheral apertures of the prepared glenoid. During this installation, tip portion 332 of center peg 330 first engages and enters the center hole of the prepared glenoid. The tip portion 352 of each of the peripheral pegs 350 then engages and enters its respective peripheral hole of the prepared glenoid. As the peripheral pegs 350 are moved into the peripheral holes, the lobes 365 of at least a portion of the radially extending features 360 directly engage the cortical bone of the prepared glenoid, which causes the lobes 365 to deflect and/or bend relative to the cylindrical body 351 of the respective peripheral pegs 350. In some such embodiments, when the glenoid implant 310 is fully installed (e.g., when all or a majority of the convex surface 324 directly engages the mating surface of the prepared glenoid), the leaves 365 also deform (e.g., plastically deform) and assume a hooked and/or barbed shape that engages cancellous bone of the prepared glenoid.

With the glenoid implant 310 fully installed/in place, the tool holding the glenoid implant 310 is disengaged therefrom before the bone cement between the central peg 330 and the central hole has an opportunity to cure (e.g., harden). However, by engaging cancellous bone of the prepared glenoid and providing a sufficient amount of the radially extending features 360 of the three peripheral pegs 350 that are self-pressurizing, the fully installed/seated position of the glenoid implant 310 relative to the prepared glenoid is maintained without the use of tools or any other tools such that (1) the bone cement between the central peg 330 and the central bore of the prepared glenoid can be cured without external forces holding the glenoid implant 310 in place, (2) if applied thereto, the bone cement between at least a portion of the convex surface 324 and the mating surface of the prepared glenoid can be cured without external forces holding the glenoid implant 310 in place, and (3) if applied thereto, the bone cement between at least a portion of the one or more peripheral pegs 350 and the corresponding peripheral bores of the prepared glenoid can be cured without holding the glenoid implant 310 in place Curing under external force in place.

Referring generally to fig. 6A-6H, a method of making glenoid implant 310 of the present disclosure will now be described. A block of material (e.g., a plastic cube) is provided and milled into the femoral glenoid component. The femoral glenoid component has a body 320 with the body 320 having a concave surface 322, a convex surface 324, and a rim surface 326. The block of material is further milled such that the femoral glenoid component also includes a central peg 330 extending from a central region 325a of the convex surface 324. The block of material is further milled such that the femoral glenoid component also includes three peripheral peg blanks extending from and integral with (i.e., unitary with) the peripheral region 325b of the convex surface 324. Each of the peripheral stud blanks is generally a cylindrical piece of material. As shown in fig. 6B, each of the peripheral peg blanks is milled using one or more tools 500 (fig. 6A) to form a portion of the cylindrical body 351, the tip portion 352, and the generally cylindrical portion 400.

As shown in fig. 6C and 6D, with the peripheral peg blank so formed (fig. 6B), the generally cylindrical portion 400 of the peripheral peg blank is cut and/or milled using one or more tools 500 (fig. 6C) to create a portion of the cylindrical body 351 and a plurality of radially extending discs 410 extending from the cylindrical body 351. With the radially extending disc 410 so formed, one or more tools 500 (fig. 6E and 6G) are positioned relative to the central axis X of the peripheral stud blank_PMove in one or more helical paths to cut and/or mill the created radially extending disks 410, thereby modifying each of the radially extending disks 410 to have three lobes 365 (fig. 6H). In some such embodiments, one or more tools 500 are positioned relative to the central axis X of the peripheral stud blank_PMove in three separate and distinct helical paths to create the helical channel 370 and three lobes 365 of each of the radially extending features 360.

Instead of one or more tools 500 moving in one or more helical paths, one or more tools 500 and/or one or more different tools may move in various other paths to cut and/or mill each of the created radially extending disks 410In three separate and distinct leaves. In some such embodiments, one or more tools 500 are positioned relative to the central axis X of the peripheral stud blank_PMoves vertically to create and/or cut three vertical channels (not shown) in a first one of the radially extending disks 410. Thus, the three vertical channels in the first radially extending disk 410 have a first rotational orientation. The tool or tools are then repositioned and repositioned relative to the central axis X of the peripheral stud blank_PVertically to create and/or cut three vertical channels (not shown) in a second one of the radially extending disks 410 such that the three vertical channels in the second radially extending disk 410 are angularly offset from the three vertical channels created in the first radially extending disk 410. This process may continue for the other radially extending disks 410 such that each of the radially extending disks 410 is cut into three lobes or portions, wherein the three lobes of each radially extending disk 410 are angularly offset as compared to the three lobes created in the other radially extending disks 410.

It is contemplated that any tool or tools may be used to manufacture/create the glenoid implant 310, such as a milling machine, a lathe, a burr, a drill bit, a thread mold, a multi-lead thread mold, a robotic arm, a chisel, or any combination thereof.

Referring now to fig. 7A-7I, humeral stem implant 110 includes a lower stem portion 120, an upper stem portion 130, a first pair of plates 140a, a second pair of plates 140b, and a biological ingrowth coating 180. The lower stem portion 120 includes a central axis X having a central axis also commonly referred to as the lower stem portion 120 or as the central axis of the humeral stem implant 110_SA substantially cylindrical portion 122. The lower handle portion 120 is generally smooth and free of a biological ingrowth coating 180.

Upper handle portion 130 extends from lower handle portion 120. In some embodiments, upper handle portion 130 and lower handle portion 120 are integral and formed from the same piece of material. Upper shank portion 130 has a central axis X relative to lower shank portion 120_SAn angled conical surface 132. Tapered surface 132 is disposed relative to a central axis X of lower shank portion 120_SIs about fifteen to about seventy-five degrees. In some embodiments, the tapered surface 132 is opposite to the lowerCenter axis X of shank portion 120_SIs about 30 degrees to about 60 degrees. In some embodiments, tapered surface 132 is opposite central axis X of lower shank portion 120_SIs about 45 degrees.

An internal bore 135 (fig. 2A, 7A, and 7C) is formed in upper shank portion 130. As described above, the internal bore 135 is used to engage the first end 212A (fig. 2A and 2B) of the humeral neck implant component 210 in a taper-locking configuration (e.g., morse taper lock). The inner bore 135 extends inwardly from the tapered surface 132 and tapers in an inward direction from the tapered surface 132 along a central axis of the inner bore 135.

While the humeral stem implant 110 can be installed in the prepared left humerus of the patient and the prepared right humerus of the patient, the following discussion assumes that the humeral stem implant 110 is installed in the prepared left humerus of the patient. A first pair of tabs 140a is coupled to rear portion 130a of the outer surface of upper handle portion 130 and a second pair of tabs 140b is coupled to front portion 130b of the outer surface of upper handle portion 130. In addition, in the center axis X_SIs positioned between rear portion 130a and front portion 130b, and in the middle direction from central axis X, a middle portion 130c of the outer surface of upper shank portion 130 is positioned between rear portion 130a and front portion 130b_SA lateral portion 130d (fig. 7B) of the outer surface of upper shank portion 130 is positioned between rear portion 130a and front portion 130B in the transverse direction of (a).

As best shown in fig. 7C and 7D, the first pair of panels 140a includes a first panel 141a and a second panel 151 a. Similarly, the second pair of panels 140b includes a first panel 141b and a second panel 151 b. The second pair of pieces 140b is arranged to pass through the central axis X_SA mirror image of the first pair of plates 140a above the central plane bisecting the humeral stem implant 110. Although in some embodiments the second pair of tabs 140b is different from the first pair of tabs 140 a.

As best shown in FIGS. 7D and 7F, the first piece 141a of the first pair of pieces 140a has a central axis X with respect to the central axis_SAnd/or angle theta in the vertical direction_1ACentral axis X of_F1AWherein the angle theta_1AAnd may be any angle, for example, from about 5 degrees to about 30 degrees. In some embodiments, the angle θ_1AFrom about 10 degrees to about 15 degrees. Similarly, the first piece 141b of the second pair of pieces 140b has a central axis with respect toX_SAnd/or angle theta in the vertical direction_1BCentral axis X of_F1BWherein the angle theta_1BAnd may be any angle, for example, from about 5 degrees to about 30 degrees. In some embodiments, the angle θ_1BFrom about 10 degrees to about 15 degrees.

First piece 141a of first pair of pieces 140a has a first height/length and is attached to rear portion 130a of the outer surface of upper handle portion 130 at three separate and distinct locations such that first piece 141a is rigidly connected to upper handle portion 130. This three-point coupling also creates a first piece 141a that forms two windows 142a and 143a through which the windows 142a and 143a can receive sutures for suturing and/or pulling bone and/or muscle toward the humeral stem implant 110 during installation of the shoulder implant system 100. Alternatively or additionally, the two windows 142a and 143a also provide a location for bone growth, which can help to hold the humeral stem implant 110 in place.

Similarly, first panel 141b of second pair of panels 140b has a first height/length and is attached to front portion 130b of the outer surface of upper handle portion 130 at three separate and distinct locations such that first panel 141b is rigidly connected to upper handle portion 130. This three-point coupling also creates a first piece 141b therethrough that forms two windows 142b and 143b through which the windows 142b and 143b can receive sutures therethrough for suturing and/or pulling bone and/or muscle toward the humeral stem implant 110 during installation of the shoulder implant system 100. Alternatively or additionally, the two windows 142b and 143b also provide a location for bone growth, which can help to hold the humeral stem implant 110 in place.

The height/length of the first and second plates 141a,141b can be about 20% to about 60% of the overall height of the humeral stem implant 110. In some embodiments, the height/length of the first tabs 141a and 141b is about 30% to about 50% of the total height of the humeral stem implant 110. In some embodiments, the height/length of the first tabs 141a and 141b is about 40% of the total height of the humeral stem implant 110. In some embodiments, the height/length of the first panels 141a and 141b is about fifteen millimeters to about forty millimeters. In some embodiments, the height/length of first sheets 141a and 141b is about 20 millimeters to about 30 millimeters. In some embodiments, the height/length of first sheets 141a and 141b is about twenty-five millimeters.

As best shown in FIGS. 7C and 7G, the second piece 151a of the first pair of pieces 140a has a central axis X with respect to_SAnd/or angle theta in the vertical direction_2ACentral axis X of_F2AWherein the angle theta_2AAnd may be any angle, for example, from about 20 degrees to about 40 degrees. In some embodiments, the angle θ_2AFrom about 25 degrees to about 30 degrees. Similarly, the second piece 151b of the second pair of pieces 140b has a center axis X with respect to_SAnd/or angle theta in the vertical direction_2BCentral axis X of_F2BWherein the angle theta_2BAnd may be any angle, for example, from about 20 degrees to about 40 degrees. In some embodiments, the angle θ_2BFrom about 25 degrees to about 30 degrees.

The different angles of the first pieces 141a,141b as compared to the second pieces 151a,151b help to prevent rotation of the humeral stem implant 110 when positioned in the humeral cavity of a prepared humerus of a patient by engaging cancellous bone at different angles.

The second piece 151a of the first pair of pieces 140a has a second height/length (e.g., less than the first height of the first piece 141 a) and is attached to the rear portion 130a of the outer surface of the upper handle portion 130 at two separate and distinct locations such that the second piece 151a is rigidly connected to the upper handle portion 130. This two-point coupling also creates a second piece 151a that forms one window 152a through which window 152a can receive sutures for suturing and/or pulling bone and/or muscle toward the humeral stem implant 110 during installation of the shoulder implant system 100. Alternatively or additionally, the window 152a also provides a location for bone growth, which can help to hold the humeral stem implant 110 in place.

Similarly, second tab 151b of second pair of tabs 140b has a second height/length (e.g., less than the first height of first tab 141 b) and is attached to front portion 130b of the outer surface of upper handle portion 130 at two separate and distinct locations such that second tab 151b is rigidly connected to upper handle portion 130. This two-point coupling also creates a second piece 151b that forms one window 152b through which the window 152b can receive sutures for suturing and/or pulling bone and/or muscle toward the humeral stem implant 110 during installation of the shoulder implant system 100. Alternatively or additionally, the windows 152b also provide a location for bone growth, which can help to hold the humeral stem implant 110 in place.

The height/length of the second pieces 151a and 151b can be about 5% to about 35% of the overall height of the humeral stem implant 110. In some embodiments, the height/length of the second pieces 151a and 151b is about 15% to about 25% of the overall height of the humeral stem implant 110. In some embodiments, the height/length of the second pieces 151a and 151b is about 20% of the overall height of the humeral stem implant 110. In some embodiments, the height/length of the second pieces 151a and 151b is about five millimeters to about twenty millimeters. In some embodiments, the height/length of the second pieces 151a and 151b is about ten millimeters and about fifteen millimeters. In some embodiments, the height/length of the second pieces 151a and 151b is about 12 millimeters.

As best shown in fig. 7H and 7I, which are cross-sectional views through first sheet 141a (fig. 7E) at two different heights along first sheet 141a to illustrate the difference in the body of first sheet 141a along its height/length. Specifically, the upper portion of the first piece 141a has a generally square cross-section with rounded corners (fig. 7H), while the lower portion of the first piece 141a has a wedge-shaped cross-section with rounded edges 145 (fig. 7I). Thus, during installation of the humeral stem implant 110, the wedge shape of the lower portion of the first plate 141a directly engages and compresses cancellous bone in the prepared humerus of the patient. This compression of the cancellous bone by the first sheet 141a helps prevent rotation of the humeral stem implant 110 when the humeral stem implant 110 is fully installed (e.g., the conical surface 132 is substantially flush with the cut humerus or osteotomy cutting surface). Similarly, the first and second sheets 141b,151a and a portion (e.g., lower portion) of the second sheet 151b can include the same or similar wedge shape to also engage and compact cancellous bone. Further, the entire body of each of the tabs 141a,141b,151a,151b may have a wedge-shaped cross-section. In some embodiments, the wedge-shaped cross-section forms a sharp or knife edge (e.g., instead of a rounded edge 145) to facilitate cutting of cancellous bone during installation of the humeral stem implant 110.

As best shown in fig. 7A-7D, biological ingrowth coating 180 is attached to most of the exterior surface of upper handle portion 130. In some embodiments, the bio-ingrowth coating 180 extends downward from the tapered surface 132 and past or beyond the first tabs 141a and 141 b. In some embodiments, the bio-ingrowth coating 180 extends downward from the tapered surface 132 and past or beyond the first tabs 141a and 141b by at least 1 millimeter. As shown, bio-ingrowth coating 180 is not attached to tapered surface 132, lower handle portion 120, first pair of tabs 140a, and second pair of tabs 140 b. Alternatively, the bio-ingrowth coating 180 may be attached to a portion of one or more of (i) the tapered surface 132, (ii) the lower handle portion 120, (iii) the first pair of sheets 140a, and (iv) the second pair of sheets 140 b. Bio-ingrowth coating 180 is a very porous material that is typically attached to upper stem portion 130. In some embodiments, the biological ingrowth coating 180 is a porous material that is porous with pores of the material as well. The biological ingrowth coating 180 is typically attached to the humeral stem implant 110 to promote osseointegration of the humeral stem implant 110 with the patient's prepared humerus.

In some embodiments, the upper stem portion 130 of the humeral stem implant 110 includes a notch 190 (fig. 7A, 7C, and 7E). Notch 190 is positioned adjacent to (e.g., below) tapered face 132 in middle portion 130c of the outer surface of upper shank portion 130. The notch 190 is sized and shaped to engage with the tip of a stem extractor tool (not shown) to seat/install therein prior to removal of the humeral stem implant 110 from the humeral canal of the prepared humerus of the patient.

It is expressly contemplated that any one or more elements of any one or more claims set forth herein may be combined with any other one or more elements of any other claim to form contemplated embodiments of the present disclosure.

Each of the above-described embodiments and obvious variations thereof is contemplated as falling within the spirit and scope of the claimed invention, which is set forth in the following claims.