Universal hip joint prosthesis wing and assembly thereof

Abstract

The present invention proposes a universal hip joint prosthesis wing and its set, including a prosthesis, a prosthesis wing detachably connected to the prosthesis, and a bushing assembly detachably connected to the rear end of the prosthesis wing; the prosthesis includes a connecting rod, the upper end of the connecting rod is fixedly connected to a hip joint connecting part, and the lower end is fixedly connected to a femoral stem; the femoral stem is provided with a universal hole; the prosthesis wing includes a fixing part and a wing; the fixing part is detachably connected to the universal hole; the front end of the wing is fixedly connected to the fixing part, and the rear end is provided with a first hexagonal hole; the bottom of the first hexagonal hole is provided with a threaded hole; the rear end of the wing is also provided with a plurality of threading holes; the bushing assembly includes a bushing, and a screw is detachably connected to the bushing; the surface of the bushing is also provided with a plurality of suture holes. The universal hip joint prosthesis wing and its set of the present invention have a simple structure and are easy to use. While meeting the requirements of hip replacement, they can solve the problems of local stress-free greater trochanter and postoperative greater trochanter protection, thereby preventing AG type periprosthetic fractures.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, and in particular to a universal hip joint prosthesis wing and a set thereof. Background Art

[0002] After hip replacement surgery, periprosthetic fracture is a common complication, among which greater trochanter fracture (Vancouver AG type) is the most common. Some greater trochanter fractures require surgical treatment, which brings pain and economic burden to patients and may affect the stability of the prosthesis in severe cases.

[0003] Some patients suffer from osteoporosis, which can easily lead to greater trochanter fractures in minor trauma or falls. The causes of osteoporosis are: first, the patients are old and have weakened metabolism; second, there is a lack of local stress stimulation, resulting in disuse osteoporosis.

[0004] Therefore, a new type of hip prosthesis is needed that can solve the problem of local stress-free greater trochanter and postoperative greater trochanter protection while meeting the requirements of hip replacement, thereby preventing AG-type periprosthetic fractures. Summary of the invention

[0005] In order to solve the above problems, the present invention proposes a universal hip joint prosthesis wing and a set thereof.

[0006] The technical solution of the present invention is: a universal hip joint prosthesis wing and its set, comprising a prosthesis, the prosthesis is detachably connected to the prosthesis wing, and the rear end of the prosthesis wing is detachably connected to a bushing assembly; the prosthesis comprises a connecting rod, the upper end of the connecting rod is fixedly connected to a hip joint connecting part, and the lower end is fixedly connected to a femoral stem; the upper end of the femoral stem is provided with a universal hole, and the direction of the universal hole is from the outer surface of the femoral stem to the axis of the femoral stem; the prosthesis wing comprises a fixing part and a side wing; the fixing part is detachably connected to the universal hole; the front end of the side wing is fixedly connected to the fixing part, and the rear end is provided with a first hexagonal hole parallel to the axis of the side wing; the bottom of the first hexagonal hole is provided with a threaded hole communicating therewith; the rear end of the side wing is also surrounded by a plurality of threading holes; the bushing assembly comprises a bushing, in which a screw is detachably connected; the surface of the bushing is also provided with a plurality of suture holes.

[0007] Furthermore, an internal thread is provided in the universal hole, an external thread is provided on the outer surface of the fixing portion, and the external thread matches the internal thread.

[0008] Furthermore, the diameter of the front end of the universal hole is smaller than the diameter of the rear end; the diameter of the front end of the fixing portion is smaller than the diameter of the rear end.

[0009] Furthermore, a pointed tip is provided at the front end of the fixing portion.

[0010] Furthermore, the side wings and the fixing portion are integrally formed.

[0011] Furthermore, the diameter of the side wing is greater than the diameter of the rear end of the fixing portion.

[0012] Furthermore, a through hole is provided in the bushing, and the screw passes through the through hole.

[0013] Furthermore, a gasket is detachably connected to the screw, and a second hexagonal hole is provided at the rear end of the screw.

[0014] Furthermore, the threaded hole matches the screw, and the screw is detachably connected to the threaded hole.

[0015] The universal hip joint prosthesis wing and its assembly of the present invention have simple structure and are easy to use. While meeting the requirements of hip replacement surgery, they can solve the problems of local stress-free greater trochanter and postoperative greater trochanter protection, thereby preventing AG type periprosthetic fractures. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the present invention;

[0017] Figure 2 It is a cross-sectional view of the structure of the prosthesis;

[0018] Figure 3 is a schematic diagram of the structure of the prosthesis wing;

[0019] Figure 4 is a structural cross-sectional view of the prosthesis wing;

[0020] Figure 5 is a structural schematic diagram of a bushing assembly;

[0021] Figure 6 This is a diagram for use of the present invention.

[0022] In the figure, 1-prosthesis, 2-prosthesis wing, 3-bushing assembly, 4-femur; 1.1-connecting rod, 1.2-hip joint connection, 1.3-femoral stem, 1.4-universal hole, 1.5-internal thread; 2.1-fixing part, 2.2-side wing, 2.3-first hexagonal hole, 2.4-threading hole, 2.5-external thread, 2.6-pointed head, 2.7-threaded hole; 3.1-bushing, 3.2-through hole, 3.3-suture hole, 3.4-screw, 3.5-second hexagonal hole, 3.6-gasket; 4.1-greater trochanter. DETAILED DESCRIPTION

[0023] The universal hip joint prosthesis wing and its assembly of the present invention are described in detail below with reference to the accompanying drawings.

[0024] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 As shown, a universal hip joint prosthesis wing and its set, including a prosthesis 1, a prosthesis wing 2 is detachably connected to the prosthesis 1, and a bushing assembly 3 is detachably connected to the rear end of the prosthesis wing 2; the prosthesis 1 includes a connecting rod 1.1, the upper end of the connecting rod 1.1 is fixedly connected to a hip joint connecting part 1.2, and the lower end is fixedly connected to a femoral stem 1.3; a universal hole 1.4 is provided at the upper end of the femoral stem 1.3, and the direction of the universal hole 1.4 is directed from the outer surface of the femoral stem 1.3 to the axis of the femoral stem 1.3; the prosthesis wing 2 includes a fixing part 2.1 and a side wing 2.2; the fixing part 2.1 is detachably connected to the universal hole 1.4; the front end of the side wing 2.2 is fixedly connected to the fixing part 2.1, and the rear end is provided with a first hexagonal hole 2.3 parallel to the axis of the side wing 2.2; the bottom of the first hexagonal hole 2.3 is provided with a threaded hole 2.7 connected thereto; the rear end of the side wing 2.2 is also surrounded by a plurality of threading holes 2.4; the bushing assembly 3 includes a fixing part 2.1 and a side wing 2.2; The present invention comprises a bushing 3.1, in which a screw 3.4 is detachably connected; a plurality of suture holes 3.3 are also provided on the surface of the bushing 3.1; an internal thread 1.5 is provided in the universal hole 1.4, and an external thread 2.5 is provided on the outer surface of the fixing part 2.1, and the external thread 2.5 matches the internal thread 1.5; the diameter of the front end of the universal hole 1.4 is smaller than the diameter of the rear end; the diameter of the front end of the fixing part 2.1 is smaller than the diameter of the rear end; a pointed head 2.6 is provided at the front end of the fixing part 2.1; the flank 2.2 is integrally formed with the fixing part 2.1; the diameter of the flank 2.2 is larger than the diameter of the rear end of the fixing part 2.1; a through hole 3.2 is provided in the bushing 3.1, and the screw 3.4 passes through the through hole 3.2; a gasket 3.6 is detachably connected to the screw 3.4, and a second hexagonal hole 3.5 is provided at the rear end of the screw 3.4; the threaded hole 2.7 matches the screw 3.4, and the screw 3.4 is detachably connected to the threaded hole 2.7.

[0025] In actual use, the surgeon first performs hip replacement surgery according to routine operations; then uses a sight to determine the position of the universal hole 1.4, and uses a sleeve and a depth-limiting drill bit to drill a hole on the greater trochanter 4.1 so that the hole is pointed to the universal hole 1.4; then the suture is pre-fixed in the threading hole 2.4, and the prosthesis wing 2 is screwed in with a hexagonal wrench so that the fixing part 2.1 is screwed into the universal hole 1.4. At this time, the design of the pointed head 2.6 makes the screwing process more convenient, and the fixing part 2.1 is small in front and large in the back. The structure cooperates with the universal hole 1.4, so that the prosthetic wing 2 can be screwed in smoothly even if it is slightly screwed off; after the prosthetic wing 2 is fixed, the surgeon puts the bushing 3.1 on the greater trochanter 4.1, and aligns the through hole 3.2 with the hole into which the prosthetic wing 2 is punched. The bushing 3.1 is made of polyethylene material and can be trimmed to fit the greater trochanter 4.1; after putting on the bushing 3.1, the surgeon puts the washer 3.6 on the screw 3.4, and screws the screw 3.4 into the through hole 3.2 with a hexagonal wrench, so that the screw The nail 3.4 is tightly matched with the threaded hole 2.7, and the gasket 3.6 on the screw 3.4 presses the bushing 3.1 tightly; after fixing the screw 3.4, the surgeon can use the sutures pre-fixed on the threading hole 2.4 to sew back the muscles stripped due to the operation, so that the muscles pass through the suture hole 3.3 and are fixed on the greater trochanter 4.1, thereby further supplying blood to the greater trochanter 4.1; finally, the suturing step is performed and the operation is completed; in the patient's future activities, the stress generated by the hip joint movement will be transmitted to the prosthesis 1 and the prosthesis wing 2, and then transmitted to the greater trochanter 4.1 by the prosthesis wing 2. According to Wolff's law, if the human body's bones are subjected to external forces for a long time, the bone density and hardness will increase. Therefore, the stress transmitted to the greater trochanter 4.1 by the prosthesis wing 2 can stimulate the growth of the greater trochanter 4.1, thereby preventing disuse osteoporosis. At the same time, the bushing 3.1 protects the greater trochanter 4.1, enhances the ability of the greater trochanter 4.1 to resist minor trauma, thereby reducing the probability of fracture around the AG prosthesis.

[0026] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with this profession can make some changes or modifications to equivalent embodiments of equivalent changes using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the scope of the technical solution of the present invention.

Claims

1. A universal hip joint prosthesis comprising a prosthetic wing and a bushing assembly, characterized in that: The invention comprises a prosthesis (1), wherein the prosthesis (1) is detachably connected to a prosthesis wing (2), and the rear end of the prosthesis wing (2) is detachably connected to a bushing assembly (3); the prosthesis (1) comprises a connecting rod (1.1), the upper end of the connecting rod (1.1) is fixedly connected to a hip joint connecting part (1.2), and the lower end is fixedly connected to a femoral stem (1.3); the upper end of the femoral stem (1.3) is provided with a universal hole (1.4), and the direction of the universal hole (1.4) points from the outer surface of the femoral stem (1.3) to the axis of the femoral stem (1.3); the prosthesis wing (2) comprises a fixing part (2.1) and a side wing (2.2); the fixing part (2.1) is detachably connected to the universal hole (1.4); the front end of the side wing (2.2) is fixedly connected to the fixing part (2.1), and the rear end is provided with a flange parallel to the side wing (2.2) A first hexagonal hole (2.3) on the axis; a threaded hole (2.7) communicating with the first hexagonal hole (2.3) is provided at the bottom; a plurality of threading holes (2.4) are also provided around the rear end of the wing (2.2); the bushing assembly (3) comprises a bushing (3.1), in which a screw (3.4) is detachably connected; a plurality of suture holes (3.3) are also provided on the surface of the bushing (3.1); an internal thread (1.5) is provided in the universal hole (1.4), an external thread (2.5) is provided on the outer surface of the fixing part (2.1), and the external thread (2.5) matches the internal thread (1.5); the diameter of the front end of the universal hole (1.4) is smaller than the diameter of the rear end; the diameter of the front end of the fixing part (2.1) is smaller than the diameter of the rear end; the front end of the fixing part (2.1) is provided with a pointed head (2.6).

2. A universal hip joint prosthesis comprising a prosthetic wing and a bushing assembly according to claim 1, characterized in that: The side wings (2.2) and the fixing portion (2.1) are integrally formed.

3. A universal hip joint prosthesis comprising a prosthetic wing and a bushing assembly according to claim 1, characterized in that: The diameter of the side wing (2.2) is greater than the diameter of the rear end of the fixing portion (2.1).

4. A universal hip joint prosthesis comprising a prosthetic wing and a bushing assembly according to claim 1, characterized in that: The bushing (3.1) is provided with a through hole (3.2), and the screw (3.4) passes through the through hole (3.2).

5. A universal hip joint prosthesis comprising a prosthetic wing and a bushing assembly according to claim 1, characterized in that: A gasket (3.6) is detachably connected to the screw (3.4), and a second hexagonal hole (3.5) is provided at the rear end of the screw (3.4).

6. A universal hip joint prosthesis comprising a prosthetic wing and a bushing assembly according to claim 1, characterized in that: The threaded hole (2.7) matches the screw (3.4), and the screw (3.4) is detachably connected to the threaded hole (2.7).

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