Reliable femoral stem prosthesis fixing structure

Abstract

The utility model relates to the technical field of artificial prosthesis replacement, in particular to a reliable femoral stem prosthesis fixing structure which comprises a femoral head prosthesis, a femoral head seat, an upper stem and a lower stem, the femoral head prosthesis is arranged at the top end of the femoral head seat, the upper stem is movably connected with the bottom end of the femoral head seat, and the lower stem is movably connected with the femoral head seat. A positioning column is arranged at the bottom end of the femoral head prosthesis, a semi-cylindrical strip at the bottom end of a femoral head base is aligned with a semi-cylindrical groove, and then the positioning column is inserted into a positioning groove, so that when the positioning column is inserted into the positioning groove, horizontal rotation is avoided, stability is high, and meanwhile the positioning column can be adjusted to be inserted into the positioning groove from different angles; then the first screw rod penetrates through the first positioning hole, is inserted into the second positioning hole and is screwed with the first positioning hole, so that the femoral head seat is fixedly connected with the upper bone handle, and then the second screw rod is inserted into the third positioning hole formed in the first screw rod, so that the first screw rod is stably connected with the upper bone handle, the reliability of connection and fixation is improved, and the overall stability is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of artificial prosthesis replacement, in particular to a reliable femoral stem prosthesis fixing structure. Background Art

[0002] As we all know, the human femur is one of the most important bones in the human body, primarily supporting the trunk and pelvis. Hip necrosis can easily occur due to trauma, hormonal medication, or congenital factors, leading to loss of hip function and associated pain. Currently, artificial hip replacement is one of the most common and effective treatments for hip joint disease. Artificial hip replacement involves implanting a femoral stem prosthesis into the human body through orthopedic surgery to replace the human hip joint. Specifically, the femoral head of the femoral stem prosthesis is inserted into the acetabulum and the femoral stem prosthesis is inserted into the femoral medullary cavity. This procedure restores the physiological function of the hip joint to a certain extent, relieves pain, improves movement, and enhances quality of life.

[0003] The existing femoral stem prosthesis is integrated, which makes it difficult to position when implanted in the human body. Long-term use leads to poor stability and reliability, which will have an impact on the human body. In addition, hip replacements are mostly performed on the elderly who have difficulty in moving, and poor connection stability can easily lead to problems such as difficult subsequent treatment. Utility Model Content

[0004] (1) Technical problems solved

[0005] In view of the deficiencies of the prior art, the utility model provides a reliable femoral stem prosthesis fixing structure.

[0006] (2) Technical solution

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a reliable femoral stem prosthesis fixing structure, comprising a femoral head prosthesis, a femoral head seat, an upper bone stem and a lower bone stem, the top end of the femoral head seat is provided with the femoral head prosthesis, the bottom end of the femoral head seat is movably connected with the upper bone stem, the bottom end of the femoral head prosthesis is provided with a positioning column, the outer wall of the positioning column is annularly arranged with semi-cylindrical bars, the top end of the upper bone stem is provided with a positioning groove, a plurality of semi-cylindrical grooves are arranged around the positioning groove, the positioning column is adapted to the positioning groove, the semi-cylindrical bars are adapted to the semi-cylindrical bars The cylindrical groove is adapted, and one side of the femoral head seat extends to one side of the upper bone stem and is provided with a fixing seat, a first positioning hole is provided on the fixing seat, a first screw is threadedly provided on the first positioning hole, a second positioning hole is obliquely opened on the side wall of one side of the upper bone stem, the output end of the first screw passes through the second positioning hole and is adapted to the second positioning hole, a third positioning hole is opened on the side wall of the first screw, a second screw is threadedly provided on the third positioning hole, a positioning port is provided at the upper middle position of the upper bone stem, and the bottom wall of the upper bone stem is movably connected to the lower bone stem.

[0008] In order to facilitate the connection between the upper bone stem and the lower bone stem, the present invention has an improvement in that the bottom wall of the upper bone stem is provided with a threaded hole, the top wall of the lower bone stem is provided with a threaded column, and the threaded hole is threadedly connected to the threaded column.

[0009] In order to guide the connection between the upper bone handle and the lower bone handle, the utility model is improved in that a guide groove is provided at the bottom end of the threaded hole, and a guide block is provided at the bottom end of the threaded column, and the guide groove is adapted to the guide block.

[0010] In order to facilitate the insertion of the lower bone stem into the femoral medullary cavity, the utility model is improved in that a plug is provided at the bottom end of the lower bone stem.

[0011] In order to improve the adhesion of the upper bone stem and the lower bone stem, the utility model is improved in that the outer surfaces of the upper bone stem and the lower bone stem are both frosted.

[0012] In order to facilitate the fusion connection between the upper bone handle and the human body in the later stage, the utility model is improved in that a plurality of groups of healing holes are provided on the upper bone handle.

[0013] In order to increase the service life of the upper bone stem and the lower bone stem, the utility model is improved in that the upper bone stem and the lower bone stem are both made of titanium alloy.

[0014] In order to facilitate driving the first screw rod and the second screw rod, the present invention is improved in that a first knob is provided at the top end of the first screw rod, and a second knob is provided at the end end of the second screw rod.

[0015] (3) Beneficial effects

[0016] Compared with the prior art, the present invention provides a reliable femoral stem prosthesis fixation structure with the following beneficial effects:

[0017] This reliable femoral stem prosthesis fixing structure aligns the semi-cylindrical bar at the bottom end of the femoral head seat with the semi-cylindrical groove through the provided positioning column, positioning groove, semi-cylindrical bar and semi-cylindrical groove, and then inserts the positioning column into the positioning groove. In this way, when the positioning column is inserted into the positioning groove, horizontal rotation will not occur, and the stability is strong. At the same time, the positioning column can be adjusted to be inserted into the positioning groove from different angles, which is flexible, convenient and accurate in positioning to meet real-time needs.

[0018] This reliable femoral stem prosthesis fixing structure is provided with a first screw, a second screw, a first positioning hole, a second positioning hole and a third positioning hole. The first screw is inserted into the second positioning hole through the first positioning hole and is tightened to the upper stem, so that the femoral head seat is fixedly connected to the upper stem. The second screw is then inserted into the third positioning hole opened on the first screw and is tightened to stably connect the first screw to the upper stem, thereby improving the reliability of the connection and fixation between the femoral head seat and the upper stem, thereby enhancing the overall stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0020] Figure 2 For this utility model Figure 1 A schematic diagram of the structure of the enlarged part A;

[0021] Figure 3 For this utility model Figure 1 A schematic diagram of the structure of the enlarged part B;

[0022] Figure 4 This is a schematic diagram of the three-dimensional structure of the utility model from a second angle.

[0023] In the figure: 1. femoral head prosthesis; 2. femoral head seat; 3. upper stem; 4. lower stem; 5. positioning column; 6. semi-cylindrical bar; 7. positioning groove; 8. semi-cylindrical groove; 9. fixing seat; 10. first positioning hole; 11. first screw; 12. second positioning hole; 13. third positioning hole; 14. second screw; 15. positioning port; 16. threaded hole; 17. threaded column; 18. guide groove; 19. guide block; 20. plug; 21. frosted; 22. healing hole; 23. first knob; 24. second knob. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] See also Figure 1-4 , a reliable femoral stem prosthesis fixing structure, comprising a femoral head prosthesis 1, a femoral head seat 2, an upper bone stem 3 and a lower bone stem 4, the top of the femoral head seat 2 is provided with the femoral head prosthesis 1, the bottom end of the femoral head seat 2 is movably connected with the upper bone stem 3, the bottom end of the femoral head prosthesis 1 is provided with a positioning column 5, the outer wall of the positioning column 5 is annularly arranged with semi-cylindrical bars 6, the top of the upper bone stem 3 is provided with a positioning groove 7, and a plurality of semi-cylindrical grooves 8 are provided around the positioning groove 7. The positioning column 5 is connected to the The positioning groove 7 is adapted, the semi-cylindrical strip 6 is adapted to the semi-cylindrical groove 8, one side of the femoral head seat 2 extends to one side of the upper bone stem 3 and is provided with a fixing seat 9, a first positioning hole 10 is provided on the fixing seat 9, a first screw 11 is threadedly provided on the first positioning hole 10, a second positioning hole 12 is inclinedly opened on one side wall of the upper bone stem 3, the output end of the first screw 11 passes through the second positioning hole 12 and is adapted to the second positioning hole 12, and a third positioning hole 12 is opened on the side wall of the first screw 11 Positioning hole 13, the third positioning hole 13 is threaded with a second screw 14, a positioning port 15 is provided at the middle position of the upper part of the upper bone stem 3, and the bottom wall of the upper bone stem 3 is movably connected with the lower bone stem 4. In this embodiment, the semi-cylindrical strip 6 at the bottom end of the femoral head seat 2 is first aligned with the semi-cylindrical groove 8, and then the positioning column 5 is inserted into the positioning groove 7. In this way, when the positioning column 5 is inserted into the positioning groove 7, horizontal rotation will not occur, and the stability is strong. At the same time, the positioning column 5 can be adjusted to be inserted into the positioning groove 7 from different angles, which is flexible. Conveniently, to meet real-time needs, the first screw 11 is then inserted through the first positioning hole 10 into the second positioning hole 12 and tightened therewith to fix the femoral head seat 2 with the upper bone stem 3, and then the second screw 14 is inserted into the third positioning hole 13 opened on the first screw 11 to stably connect the first screw 11 with the upper bone stem 3, thereby improving the reliability of the connection and fixation, thereby enhancing the overall stability and avoiding adverse effects on the human body, and then the external bolt is passed through the positioning port 15 to position the upper bone stem 3.

[0026] In actual use, to further facilitate the connection between the upper bone stem 3 and the lower bone stem 4, in this embodiment, the bottom wall of the upper bone stem 3 is provided with a threaded hole 16, and the top wall of the lower bone stem 4 is provided with a threaded column 17. The threaded hole 16 is threadedly connected to the threaded column 17. The upper bone stem 3 and the lower bone stem 4 can be connected together through the cooperation of the threaded hole 16 and the stud.

[0027] During actual use, it further guides the connection between the upper bone handle 3 and the lower bone handle 4. In this embodiment, a guide groove 18 is provided at the bottom end of the threaded hole 16, and a guide block 19 is provided at the bottom end of the threaded column 17. The guide groove 18 is adapted to the guide block 19. By providing the guide block 19 and the guide groove 18, a guiding effect is played on the connection between the threaded hole 16 and the threaded column 17, and the connection between the upper bone handle 3 and the lower bone handle 4 is strengthened to improve stability.

[0028] During actual use, it is further facilitated to insert the lower stem 4 into the femoral medullary cavity. In this embodiment, a plug 20 is provided at the bottom end of the lower stem 4. The lower stem 4 is inserted into the femoral medullary cavity through the plug 20, which facilitates the insertion and positioning of the entire device.

[0029] During actual use, the adhesion of the upper bone stem 3 and the lower bone stem 4 is further improved. In this embodiment, the outer surfaces of the upper bone stem 3 and the lower bone stem 4 are both provided with frosting 21. By providing the frosting 21, the adhesion of the upper bone stem 3 and the lower bone stem 4 can be increased, thereby improving the stability of the overall installation.

[0030] During actual use, it is further facilitated to fuse the upper stem 3 with the human body in the later stage. In this embodiment, the upper stem 3 is provided with a plurality of healing holes 22. After the upper stem 3 and the lower stem 4 are used for a long time, the femur in the human body can grow into the plurality of healing holes 22, thereby enhancing the overall stability and avoiding adverse effects on the human body.

[0031] During actual use, the service life of the upper bone handle 3 and the lower bone handle 4 is further improved. In this embodiment, the upper bone handle 3 and the lower bone handle 4 are both made of titanium alloy. Titanium has high corrosion resistance, chemical and physical stability, and its essence is not affected after long-term contact with humans, thereby improving the overall stability.

[0032] During actual use, it is further convenient to drive the first screw rod 11 and the second screw rod 14. In this embodiment, a first knob 23 is provided at the top end of the first screw rod 11, and a second knob 24 is provided at the end end of the second screw rod 14. The first knob 23 facilitates driving the first screw rod 11, and the second knob 24 facilitates driving the second screw rod 14.

[0033] In order to explain in detail the possible application scenarios, technical principles, specific solutions that can be implemented, and the purpose and effects of this application, the following is a detailed description of the specific embodiments listed in conjunction with the accompanying drawings. The embodiments described herein are only used to more clearly illustrate the technical solutions of this application and are therefore only examples and are not intended to limit the scope of protection of this application.

[0034] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A reliable femoral stem prosthesis fixing structure, comprising a femoral head prosthesis (1), a femoral head seat (2), an upper stem (3) and a lower stem (4), characterized in that: The top of the femoral head seat (2) is provided with the femoral head prosthesis (1), the bottom of the femoral head seat (2) is movably connected with the upper bone stem (3), the bottom of the femoral head prosthesis (1) is provided with a positioning column (5), the outer wall of the positioning column (5) is annularly arranged with a semi-cylindrical bar (6), the top of the upper bone stem (3) is provided with a positioning groove (7), and a plurality of semi-cylindrical grooves (8) are provided around the positioning groove (7), the positioning column (5) is adapted to the positioning groove (7), the semi-cylindrical bar (6) is adapted to the semi-cylindrical groove (8), and one side of the femoral head seat (2) extends to one side of the upper bone stem (3) and is provided with a fixing seat (9) A first positioning hole (10) is provided on the fixing seat (9), a first screw rod (11) is threadedly provided on the first positioning hole (10), a second positioning hole (12) is obliquely provided on one side wall of the upper bone stem (3), an output end of the first screw rod (11) passes through the second positioning hole (12) and is adapted to the second positioning hole (12), a third positioning hole (13) is provided on the side wall of the first screw rod (11), a second screw rod (14) is threadedly provided on the third positioning hole (13), a positioning opening (15) is provided at the middle position of the upper part of the upper bone stem (3), and the bottom wall of the upper bone stem (3) is movably connected to the lower bone stem (4).

2. A reliable femoral stem prosthesis fixation structure according to claim 1, characterized in that: The bottom wall of the upper bone stem (3) is provided with a threaded hole (16), and the top wall of the lower bone stem (4) is provided with a threaded column (17), and the threaded hole (16) is threadedly connected to the threaded column (17).

3. A reliable femoral stem prosthesis fixation structure according to claim 2, characterized in that: The bottom end of the threaded hole (16) is provided with a guide groove (18), the bottom end of the threaded column (17) is provided with a guide block (19), and the guide groove (18) is adapted to the guide block (19).

4. A reliable femoral stem prosthesis fixation structure according to claim 3, characterized in that: The bottom end of the lower bone handle (4) is provided with a plug (20).

5. A reliable femoral stem prosthesis fixation structure according to claim 4, characterized in that: The outer surfaces of the upper bone stem (3) and the lower bone stem (4) are both provided with frosting (21).

6. A reliable femoral stem prosthesis fixation structure according to claim 5, characterized in that: The upper bone handle (3) is provided with multiple groups of healing holes (22).

7. A reliable femoral stem prosthesis fixation structure according to claim 6, characterized in that: The upper bone stem (3) and the lower bone stem (4) are both made of titanium alloy.

8. The reliable femoral stem prosthesis fixation structure according to claim 7, characterized in that: The top end of the first screw rod (11) is provided with a first knob (23), and the end of the second screw rod (14) is provided with a second knob (24).

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