阅读说明：本技术 一种保留大、小转子骨质的假体 (Prosthesis for retaining greater trochanter bone and lesser trochanter bone ) 是由 李瑞娜 史春生 康树靖 李晓娜 史春宝 许奎雪 刘晓薇 李喜旺 岳术同 于 2021-09-01 设计创作，主要内容包括：本发明提供一种保留大、小转子骨质的假体,包括：顺次连接的股骨锥、股骨颈、肩部、防旋转部,所述股骨锥用于与股骨球头锥度配合,所述防旋转部用于与截骨段连接。其优点是：可有效保留大、小转子骨质,增强假体植入的稳定性,且该结构重量小,增强患者术后体验。(The invention provides a prosthesis for retaining large and small trochanter sclerotin, comprising: the femur awl, the femoral neck, the shoulder, the rotation-preventing part that connect in order, the femur awl is used for with femoral bulb taper fit, the rotation-preventing part is used for being connected with the osteotomy section. The advantages are that: can effectively reserve the greater trochanter bone and the lesser trochanter bone, enhance the stability of the implantation of the prosthesis, and the weight of the structure is small, and the postoperative experience of the patient is enhanced.)

1. A prosthesis for preserving greater and lesser trochanter bone mass, comprising: including femoral awl (1), thighbone neck (2), shoulder (3) that connect in order, prevent rotating part (4), femoral awl (1) is used for with thighbone bulb taper fit, prevent rotating part (4) and be used for being connected with the osteotomy section.

2. The prosthesis for preserving greater and lesser trochanter bone mass of claim 1, wherein: the femoral head cone (1) is composed of a connecting section (11), an extending section (12) and an exposed section (13) which are connected in sequence, the connecting section (11) and the extending section (12) are both positioned in a femoral head and are in taper connection with the femoral head, and the exposed section (13) is exposed out of the femoral head and is connected with the femoral neck (2);

the longitudinal section of the connecting section (11) is in a regular isosceles trapezoid shape, the longitudinal section of the extending section (12) is in a square or rectangular shape, and the longitudinal section of the exposed section (13) is in an inverted isosceles trapezoid shape.

3. The prosthesis for preserving greater and lesser trochanter bone mass of claim 1, wherein: the shoulder (3) is composed of an arc-shaped part (31) with an arc-shaped longitudinal section and a vertical part (32) which is integrally formed with the arc-shaped longitudinal section and has an inverted isosceles trapezoid longitudinal section, and an included angle alpha formed between an extension line of a vertical center line of the vertical part (32) and an extension line of a center line of the neck part is 132-137 degrees.

4. A prosthesis for preserving greater and lesser trochanteric bone mass as claimed in claim 3, wherein: the cross section of the anti-rotation part (4) is of a rectangular structure, and the width direction of the rectangular structure is designed in an arc shape; the width and length of the anti-rotation portion (4) are smaller than the diameter of the lower end face of the vertical portion (32).

5. The prosthesis for preserving greater and lesser trochanter bone mass as claimed in any one of claims 1 to 4, wherein: the anti-rotation part (4) is connected with the shoulder part (3) at a forward inclination angle of 13-16 degrees.

Technical Field

The invention relates to the technical field of medical treatment, in particular to a prosthesis for retaining large and small trochanter sclerotin.

Background

Amputation was usually adopted before 90 s for comminuted fractures, bone tumors, and bone defects caused by osteolysis and bone resorption after joint prosthesis surgery. However, because of the structural characteristics of the existing hip joint prosthesis, the soft tissues at the positions of the large and small trochanters need to be bound to combine with the prosthesis, and cannot grow into the prosthesis, and the weight of the prosthesis is heavy, which is easy to cause burden to the patient, and the stability of implantation is poor.

Disclosure of Invention

The invention provides a prosthesis for retaining greater trochanter bone and lesser trochanter bone, which aims to overcome at least one technical defect, so that the original greater trochanter bone and lesser trochanter bone of an affected part can be effectively retained, cortical bone is not touched in the insertion process, the marrow dilating difficulty in the operation is reduced, and the complete cortical bone function is retained.

In order to achieve the above purpose, the invention provides the following technical scheme:

a prosthesis for preserving greater and lesser trochanteric bone comprising: the femur awl, the femoral neck, the shoulder, the rotation-preventing part that connect in order, the femur awl is used for with femoral bulb taper fit, the rotation-preventing part is used for being connected with the osteotomy section.

Preferably, the femoral awl is composed of a connecting section, an extending section and an exposed section which are connected in sequence, the connecting section and the extending section are both positioned in the femoral ball head and are in taper connection with the femoral ball head, and the exposed section is exposed out of the femoral ball head and is connected with the femoral neck;

the longitudinal section of the connecting section is in a regular isosceles trapezoid shape, the longitudinal section of the extending section is in a square or rectangular shape, and the longitudinal section of the exposed section is in an inverted isosceles trapezoid shape.

Preferably, the shoulder portion is composed of an arc-shaped portion with an arc-shaped longitudinal section and a vertical portion with an inverted isosceles trapezoid longitudinal section, wherein the vertical portion is integrally formed with the arc-shaped longitudinal section, and an included angle formed between an extension line of a vertical center line of the vertical portion and an extension line of a center line of the neck portion is 132-137 °.

Preferably, the cross section of the anti-rotation part is configured to be a rectangular structure, and the width direction of the rectangular structure is designed to be an arc shape; the width and the length of the anti-rotation part are both smaller than the diameter of the lower end face of the vertical part;

preferably, the anti-rotation part is connected with the shoulder part at a forward inclination angle of 13-16 degrees.

The invention relates to a prosthesis for reserving greater trochanter bone and lesser trochanter bone, which has the advantages that:

1. the prosthesis has the advantages that due to the structural design, the large trochanter bone and the small trochanter bone can be effectively reserved, the stability of prosthesis implantation is enhanced, the structure is light in weight, and the postoperative experience of a patient is enhanced;

2. in the prosthesis, the femoral awl is in system fit with the femoral ball head, so that the prosthesis can be compressed and tightened, and the stability of the prosthesis after implantation is ensured;

3. the prosthesis has the advantages that the included angle formed between the extension line of the vertical central line of the vertical part and the extension line of the central line of the neck part is preferably 135 degrees, on one hand, the prosthesis accords with the condition of the medullary cavity at the upper end of the femur of a Chinese person, on the other hand, the angle design ensures that the cortical bone is not touched in the insertion process, the reaming difficulty in the operation is reduced, and the complete cortical bone function can be kept;

4. in the prosthesis, the angle design of the anti-rotation part and the anteversion angle between the anti-rotation part and the shoulder part accords with the physiological angle of a human body, and the leg of a patient can move freely after the prosthesis is implanted.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention. In the drawings:

FIG. 1 is a schematic perspective view of a prosthesis for preserving greater and lesser trochanter bone mass according to the present invention;

FIG. 2 is a side view of a prosthesis for preserving greater and lesser trochanter bone mass according to the present invention;

FIG. 3 is a schematic top view of a prosthesis for preserving greater and lesser trochanter bone mass according to the present invention;

FIG. 4 is a schematic view of a prosthesis for retaining large and small trochanteric bone in accordance with the present invention in association with an osteotomy segment and a broach;

FIG. 5 is a schematic view of a prosthesis for preserving greater and lesser trochanteric bone mass in cooperation with a particular osteotomy segment in accordance with the present invention;

wherein:

a femoral awl 1, a connecting end 11, an extending section 12, an exposed section 13,

A femoral neck 2;

shoulder 3, arc 31, vertical 32;

the anti-rotation part 4, the femoral head 5, the greater trochanter 6 and the lesser trochanter 7.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.

In order to improve the stability of the implantation of the prosthesis and to enable its growth into the prosthesis, the present invention provides a prosthesis for retaining the greater and lesser trochanteric bone, according to the description of figures 1-5, the main structure of which comprises: femur awl 1, thighbone neck 2, shoulder 3, the rotation-preventing part 4 that connects in order, femur awl 1 be used for with thighbone bulb taper fit, rotation-preventing part 4 is used for being connected with the osteotomy section.

The technical scheme of the embodiment is realized as follows: firstly, the femoral awl 1 is in taper connection with a femoral ball head, and then the prosthesis is inserted into a medullary cavity, so that the anti-rotation part 4 at the lower part of the prosthesis is connected with the osteotomy section, and the stability of the implanted prosthesis and the freedom degree of the leg movement of a patient are enhanced.

In a specific implementation process, in order to enable the prosthesis to be stably connected with a femoral head, the femoral head 1 is composed of a connecting section 11, an extending section 12 and an exposed section 13 which are connected in sequence, the connecting section 11 and the extending section 12 are both located in the femoral head and are in taper connection with the femoral head, the exposed section 13 is exposed outside the femoral head and is connected with the femoral neck 2, wherein the longitudinal section of the connecting section 11 is in a regular isosceles trapezoid shape, the longitudinal section of the extending section 12 is in a square or rectangular shape, and the longitudinal section of the exposed section 13 is in an inverted isosceles trapezoid shape, so that the femoral head and the femoral head 1 are prevented from loosening or separating from each other in a movement process after the prosthesis is implanted.

In a specific embodiment, in order to make the prosthesis suitable for the use of the upper angle of femur of a Chinese person and simultaneously suitable for the use of medullary cavities with various shapes, the shoulder 3 is composed of an arc part 31 with an arc longitudinal section and a vertical part 32 with an inverted isosceles trapezoid longitudinal section, wherein the vertical part 32 is integrally formed with the arc part, and the extension line of the vertical central line of the vertical part 32 forms an included angle alpha of 132-137 degrees with the extension line of the central line of the neck (as shown in fig. 2); preferably, in order to ensure that the prosthesis does not touch the cortical bone when implanted, reduce the difficulty of reaming the marrow during the operation and maintain the complete function of the cortical bone, the angle α formed between the extension line of the vertical central line of the vertical part 32 and the extension line of the central line of the neck part is 135 °.

In the specific implementation process, in order to ensure that the legs of a patient can move freely after the prosthesis is implanted, the anti-rotation part 4 is connected with the shoulder part 3 at an anteversion angle of 13-15 degrees; in the specific operation process, the cross section of the anti-rotation part 4 is of a rectangular structure, and the width direction of the rectangular structure is of an arc design; the width and length of the rotation preventing portion 4 are smaller than the diameter of the lower end surface of the vertical portion 32.

More specifically, as shown in fig. 3, the rotation preventing portion 4 is connected to the shoulder portion 3 at a 15 ° anteversion angle (i.e., a β angle in the drawing), and the rotation preventing portion 4 is connected to the left and right sides of the shoulder portion 3 at a 15 ° anteversion angle, respectively, in order to accommodate the left and right legs.

The structures that are not described or drawn in detail in the present invention can be realized by conventional technologies, and thus are not described in detail.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.