阅读说明：本技术 关节成形术植入物和用于定向关节假体的方法 (Arthroplasty implants and methods for orienting joint prostheses ) 是由 C·S·汉弗莱 于 2018-03-30 设计创作，主要内容包括：一种用于长骨关节成形术的系统包括肱骨头假体部件,和肱骨头假体部件的阵列,所述阵列中的每个肱骨头假体部件具有凸形关节面,所述凸形关节面是半椭圆形的并且由长轴、短轴、顶点、以及具有由沿所述长轴的长径和沿所述短轴的短径限定的椭圆形横截面形状的基部限定,其中椭圆形肱骨头假体部件的所述阵列在至少96％的患者群体中且最多至99％的患者群体中提供在最多至且不超过3mm的差异内的适宜且足够的解剖学配合。(A system for long bone arthroplasty includes a humeral head prosthetic component, and an array of humeral head prosthetic components, each humeral head prosthetic component in the array having a convex articular surface that is semi-elliptical and defined by a major axis, a minor axis, an apex, and a base having an elliptical cross-sectional shape defined by a major diameter along the major axis and a minor diameter along the minor axis, wherein the array of elliptical humeral head prosthetic components provides a suitable and sufficient anatomical fit within a variance of up to and not more than 3mm in at least 96% of a patient population and up to 99% of the patient population.)

1. A system for long bone arthroplasty, comprising: an array of humeral head prosthesis components, each humeral head prosthesis component in the array having a convex articular surface that is semi-elliptical and defined by a major axis (corresponding to the frontal plane) and a minor axis (corresponding to the sagittal plane), a major Diameter (DF) along the major axis and a minor Diameter (DS) along the minor axis, and a radius of curvature (ROCF) along the major axis and a radius of curvature (ROCS) along the minor axis, each prosthesis component including an apex and a base each having an elliptical cross-sectional shape,

the array includes a plurality of humeral head prosthesis components that (i) differ from each other in their long diameters in a range of about 1 to 4mm, and (ii) differ from each other in at least one of their short diameters, Humeral Head Heights (HHHs), ROCFs, and ROCS as a function of DF.

2. The system for long bone arthroplasty of claim 1, wherein the plurality of humeral head prosthetic components that differ from one another are characterized as varying from a base having a more circular cross-sectional shape to a more elongated elliptical cross-sectional shape having a gradually increasing DF.

3. The system for long bone arthroplasty of claim 1, wherein DF ranges from about 40mm to about 56mm between the plurality of humeral head prostheses.

4. The system for long bone arthroplasty of claim 3, wherein DF varies between the plurality of humeral head prostheses in the range of at least 40mm to no more than 56 mm.

5. The system for long bone arthroplasty of claim 1, wherein the array of elliptical humeral head prosthetic components provides an anatomical fit relative to a native humeral head in at least 96% and up to 99% of a patient population within a difference of up to and not more than 3mm in one or both of the DF and DS dimensions, wherein the native humeral head has a minor diameter equal to 0.69 times the major diameter plus another length of 10.8 millimeters plus or minus 1 or 2 millimeters in millimeters.

6. The system for long bone arthroplasty of claim 1 wherein the plurality of humeral head prosthetic components are selected from the group consisting of: (i) an array of 5 heads that differ from each other in 4mm increments on the major axis, (ii) an array of 6 heads that differ from each other in 3mm increments on the major axis, (iii) an array of 9 heads that differ from each other in 2mm increments on the major axis, and (iv) an array of 17 heads that differ from each other in 1mm increments on the major axis.

7. The system for long bone arthroplasty of claim 6, wherein DF varies between the plurality of humeral head prostheses in a range of about 40mm to about 56 mm.

8. The system for long bone arthroplasty of claim 7, wherein DF varies between the plurality of humeral head prostheses in the range of at least 40mm to no more than 56 mm.

9. The system for long bone arthroplasty of claim 1, wherein the anatomical fit of humeral head prosthetic components selected from the array is achieved by selecting a head based on size and by rotationally altering the orientation of the selected head as compared to the native humeral head to most closely match the native anatomy of the native humeral head.

10. A system for long bone arthroplasty according to claim 1 further comprising at least one generally disc-shaped coupler member having: a central axis; a prosthetic component side comprising a groove configured to interface and engage with the humeral head prosthetic component, the groove having substantially planar base and side walls and at least one prosthetic component engagement feature; an opposite side having a bone contacting surface; and lateral edges defining the prosthetic component side and the opposite side.

11. A system for long bone arthroplasty according to claim 10 wherein the orientation of the long and short axes of the humeral head prosthetic component relative to the central axis of the long bone when implanted in the long bone is determined at a coupler-prosthesis interface.

12. The system for long bone arthroplasty of claim 10 wherein the prosthetic component side of the coupler component is configured to interchangeably interface and engage with a male humeral head prosthetic component and a female prosthetic component, the system further comprising a non-elliptical prosthetic component selected from one or more of: (i) at least one concave cup having a cross-sectional shape that is circular, and (ii) a convex head having a cross-sectional shape that is circular.

13. The system for long bone arthroplasty according to claim 10, the coupler member comprising one or more of the following on the opposite side: (i) a male cone, (ii) an anchor integral with the coupler member and selected from the group consisting of a cage and a shank, and (iii) an anchor engagement feature extending from a surface and radially offset from the central axis.

14. A system for long bone arthroplasty according to claim 13 wherein the coupler member includes at least one anchor engaging feature extending from a surface on opposite sides thereof and radially offset from the central axis, the system further comprising an anchoring member including a proximal portion having a proximal surface for contacting at least a portion of the opposite sides of the coupler member and a distal portion for positioning within bone, the proximal portion including a coupler member engaging feature on a proximal surface thereof.

15. An arthroplasty assembly, comprising:

a prosthetic component and a coupler component engageable to provide an arthroplasty assembly, wherein the position of the prosthetic component is rotationally alterable about a shared central engagement axis with the coupler component,

the prosthetic component is selected from an array comprising a plurality of humeral head prosthetic components that (i) differ from each other in their long axes in the range of about 1 to 4mm, and (ii) differ from each other in at least one of a short axis, a Humeral Head Height (HHH), a ROCF, and a ROCS as a function of DF, wherein each humeral head prosthetic component in the array has a convex articular surface that is semi-elliptical and defined by a long axis (corresponding to the frontal plane) and a short axis (corresponding to the sagittal plane), a long axis (DF) along the long axis and a short axis (DS) along the short axis, and a radius of curvature (ROCF) along the long axis and a radius of curvature (ROCS) along the short axis, each prosthetic component comprising an apex and a base each having an elliptical cross-sectional shape,

the coupler component includes a prosthetic component engagement side and an opposite side including a bone contacting surface, the sides being bounded by a lateral edge that is one of cylindrical, frustoconical, and frusto-hemispherical,

wherein, when a selected one of the prosthesis and coupler component is engaged and the coupler component is recessed in a bone, rotation of the prosthesis component within the coupler component provides alignment of the bone articular surface of the prosthesis component with the bone anatomically similar to a natural long bone.

16. The arthroplasty assembly of claim 15 wherein the assembly is unanchored.

17. The arthroplasty assembly of claim 15 wherein the assembly comprises an anchor component, and wherein the coupler component is selected from an array comprising a plurality of coupler components, each coupler component in the array comprising variably positioned anchor engagement features on opposing sides thereof, wherein each of at least two of the plurality of coupler components comprises at least one anchor engagement feature eccentric to a center point of the coupler component, and wherein the eccentric engagement features on each of the at least two coupler components are at different distances in at least one dimension relative to the center point, and wherein the anchor component is selected from an array comprising a plurality of anchor components each comprising a proximal portion having a proximal surface for contacting at least a portion of the coupler component and a distal portion for positioning within a bone, the proximal portion has an inclination angle of about 120 to about 145 degrees relative to the long bone and includes a coupler member engagement feature.

18. A method for implanting a modular system for long bone arthroplasty, comprising:

(a) providing an arthroplasty assembly according to claim 15;

(b) selecting the coupler component and a prosthetic component;

(c) at least temporarily fitting the selected coupler component into the metaphysis of the long bone; and

(d) engaging the selected prosthetic component into the recess of the prosthetic component side of the coupler component.

19. The method for implanting a modular system for long bone arthroplasty of claim 18 wherein the coupler members comprise one or more of the following on the opposing side: a male cone, an anchor integral with the coupler member and selected from the group consisting of a cage and a shank, and an anchor engagement feature extending from a surface and radially offset from the central axis.

20. The method for implanting a modular system for long bone arthroplasty of claim 19, comprising:

at least one anchor engagement feature on the opposite side of the coupler member extending from the bone contacting surface and radially offset from the central axis, an

An anchor member including a proximal portion having a proximal surface for contacting at least a portion of the anchor member side of the coupler member and a distal portion for positioning within bone, the proximal portion including a coupler member engagement feature on a proximal surface thereof,

wherein the orientation of the long and short axes of the humeral head prosthetic component relative to the central axis of the long bone is determined at a coupler-prosthesis interface, and wherein the eccentricity of the prosthetic component with the central axis of the long bone is determined at an anchor-coupler interface.