Multifunctional femoral stem prosthesis

Abstract

The utility model relates to the technical field of artificial prostheses, in particular to a multifunctional femoral stem prosthesis which comprises a femoral head sleeve, a stem awl, a femoral head seat, an upper bone stem and a lower bone stem, the stem awl is mounted at the bottom end of the femoral head sleeve, the femoral head seat is connected to the bottom end of the stem awl, the bottom end of the femoral head seat is connected with the top wall of the upper bone stem, and the lower end of the femoral head seat is connected with the top wall of the lower bone stem. When the positioning column is inserted into the positioning groove, the positioning column cannot horizontally rotate, the stability is high, meanwhile, the positioning column can be adjusted to be inserted into the positioning groove from different angles, flexibility and convenience are achieved, the installation angle of the upper bone handle and the installation angle of the lower bone handle can be adjusted conveniently, and the installation efficiency is improved. Then the threaded rod penetrates through the threaded hole formed in the taper shank until passing through the femoral head seat and the upper bone handle, and then penetrates through the top of the lower bone handle to be fastened with the lower bone handle, so that the reliability of connection and fixation is improved, and the overall stability is enhanced.

Description

TECHNICAL FIELD

[0001] The utility model relates to artificial prosthesis technical field, concretely is a multifunctional femoral stem prosthesis. BACKGROUND

[0002] It is known that the human femur is one of the most important bones in the human body, and the main functions include supporting the torso and pelvis of the human body. Under the stimulation of trauma, hormone drugs or congenital reasons, the hip joint is prone to necrosis, resulting in loss of physiological function of the human hip joint and accompanying pain and other symptoms. Artificial hip replacement is one of the most common and effective methods for treating hip joint diseases. Artificial hip replacement refers to a method of implanting a femoral stem prosthesis into the human body through orthopedic replacement surgery to replace the human hip joint. Specifically, the femoral head of the femoral stem prosthesis is fitted into the acetabulum, and the femoral stem of the femoral stem prosthesis is inserted into the femoral medullary cavity, so that the patient can recover the physiological function of the hip joint to a certain extent, relieve pain, and improve movement and quality of life.

[0003] Due to the diversity of the shape of the patient's femoral medullary cavity, customized and serialized femoral stem prostheses result in small product use coverage, and a single femoral stem prosthesis can only meet the use of patients with a certain femoral medullary cavity shape. However, after the existing upper and lower bone stems are connected, the positioning effect is usually poor, and horizontal rotation easily occurs, resulting in poor stability of the femoral stem prosthesis after implantation and problems such as loosening of the prosthesis. SUMMARY

[0004] (I) Technical problem solved

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

[0006] (II) Technical solution

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a multifunctional femoral stem prosthesis, which comprises a femoral head sleeve, a stem cone, a femoral head seat, an upper bone stem and a lower bone stem, the bottom end of the femoral head sleeve is provided with the stem cone, the bottom end of the stem cone is connected with the femoral head seat, the bottom end of the femoral head seat is connected with the top wall of the upper bone stem, the bottom end of the upper bone stem is movably provided with the lower bone stem, the bottom wall of the upper bone stem is provided with a positioning column, the top end of the lower bone stem is provided with a positioning groove, the periphery of the positioning column is uniformly provided with a positioning cylindrical strip, the periphery of the positioning groove is uniformly provided with a positioning cylindrical groove, the positioning column is matched with the positioning groove, the positioning cylindrical strip is matched with the positioning cylindrical groove, the top end of the stem cone is provided with a threaded hole, the threaded hole extends through the femoral head seat and the upper bone stem and into the lower bone stem, and a threaded rod is screwedly arranged in the threaded hole.

[0008] In order to facilitate the positioning of the upper bone stem and the lower bone stem, the utility model improves that the threaded hole penetrates the positioning column and the positioning groove and is at the central position of the positioning column and the positioning groove.

[0009] In order to facilitate the insertion of the lower bone stem into the femoral medullary cavity, the utility model improves that the bottom end of the lower bone stem is provided with a plug, and a groove body is formed in the middle of the plug.

[0010] In order to strengthen the connection of the upper bone stem and the human body, the utility model improves that a plurality of reinforcing stripes are arranged on one side of the upper bone stem.

[0011] In order to increase the adhesion of the upper bone stem and the lower bone stem, the utility model improves that the outer wall of the upper bone stem and the lower bone stem is provided with a protrusion.

[0012] In order to facilitate the positioning of the threaded rod, the utility model improves that a positioning cap is arranged at the end of the threaded rod.

[0013] In order to facilitate the fusion connection of the upper bone stem and the human body in the later period, the utility model improves that a plurality of healing holes are arranged on one side of the upper bone stem.

[0014] In order to improve the service life of the upper bone stem and the lower bone stem, the utility model improves that the upper bone stem and the lower bone stem are made of titanium alloy.

[0015] (Three) beneficial effects

[0016] Compared with the prior art, the utility model provides a multifunctional femoral stem prosthesis, which has the following

[0017] Beneficial effects:

[0018] The multifunctional femoral stem prosthesis is provided with the positioning column, the positioning groove, the positioning cylindrical strip, the positioning cylindrical groove and the threaded rod, so that the positioning column is inserted into the positioning groove, the positioning cylindrical strip enters the positioning cylindrical groove, the upper bone stem and the lower bone stem are preliminarily positioned and connected, when the positioning column is inserted into the positioning groove, the positioning cylindrical strip limits the positioning column in the positioning groove and does not rotate horizontally, the stability is high, the positioning column can be inserted into the positioning groove from different angles, and the installation angle of the upper bone stem and the lower bone stem can be adjusted flexibly and conveniently, then the threaded rod is passed through the threaded hole formed in the taper handle, passes through the femoral head seat and the upper bone stem, and is fastened with the lower bone stem through the top of the lower bone stem, the reliability of the connection and fixation is improved, and the overall stability is strengthened.

[0019] The multifunctional femoral stem prosthesis, by setting the convex, can increase the adhesion of the upper stem and the lower stem, thereby improving the stability of the overall installation, by setting the multiple healing holes, the reinforcing stripes and the groove, after long-term use, with the growth of the femur, the reinforcing stripes can strengthen the connection between the upper stem and the human body, improve the overall stability, the healing holes and the groove can provide space for the growth of the femur in the later period, increase the connection between the device and the human body. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a first angle three-dimensional structure schematic view of the utility model;

[0021] Figure 2 It is a second angle three-dimensional structure schematic view of the utility model;

[0022] Figure 3 It is a third angle three-dimensional structure schematic view of the utility model;

[0023] Figure 4 It is a partial A place enlarged structure schematic view of the utility model. Figure 3

[0024] In the drawing: 1, femoral head cover; 2, stem cone; 3, femoral head seat; 4, upper stem; 5, lower stem; 6, positioning column; 7, positioning groove; 8, positioning cylindrical bar; 9, positioning cylindrical groove; 10, threaded hole; 11, threaded rod; 12, plug; 13, groove; 14, reinforcing stripe; 15, convex; 16, positioning cap; 17, healing hole. DETAILED DESCRIPTION

[0025] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model, obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor are within the protection scope of the utility model.

[0026] Please refer to Figures 1-4 ​The utility model provides a multi -functional femoral stem prosthesis, including femoral head cover 1, handle cone 2, femoral head seat 3, upper bone stem 4 and lower bone stem 5, the bottom end of femoral head cover 1 is installed handle cone 2, the bottom end of handle cone 2 is connected with femoral head seat 3, the bottom end of femoral head seat 3 is connected with the top wall of upper bone stem 4, the bottom end of upper bone stem 4 movably is provided with lower bone stem 5, the bottom wall of upper bone stem 4 is provided with positioning column 6, the top end of lower bone stem 5 is provided with positioning groove 7, the four quarters of positioning column 6 evenly are arranged with positioning cylinder strip 8, the four quarters of positioning groove 7 evenly are arranged with positioning cylinder groove 9, positioning column 6 is adapted with positioning groove 7, positioning cylinder strip 8 is adapted with positioning cylinder groove 9, the top end of handle cone 2 is provided with threaded hole 10, threaded hole 10 extends to lower bone stem 5 in femoral head seat 3 and upper bone stem 4, threaded hole 10 is provided with threaded rod 11 in screw thread, in the embodiment, when needing to connect lower bone stem 5 and upper bone stem 4, make the positioning cylinder strip 8 of upper bone stem 4 bottom end alignment positioning cylinder groove 9, make positioning column 6 insert positioning groove 7, with the positioning cylinder strip 8 enters positioning cylinder groove 9, make upper bone stem 4 and lower bone stem 5 carry out preliminary positioning connection, when positioning column 6 inserts positioning groove 7, can not occur horizontal rotation, and the stability is strong, can adjust positioning column 6 from different angles and inserts positioning groove 7 simultaneously, is flexible convenient, to adjust the installation angle of upper bone stem 4 and lower bone stem 5, then threaded rod 11 passes through the threaded hole 10 of the cone and is set up, until through femoral head seat 3 and upper bone stem 4, then passes through the top of lower bone stem 5 and is fastened with lower bone stem 5, improves the reliability of connection and fixation, to strengthen the stability of the whole.

[0027] In actual use, further facilitate the positioning of the upper bone stem 4 and the lower bone stem 5, in the embodiment, the threaded hole 10 penetrates the positioning column 6 and the positioning groove 7, and is at the central position of the positioning column 6 and the positioning groove 7, when the positioning column 6 and the positioning groove 7 are installed and clamped, it is convenient to connect the lower bone stem 5 and the upper bone stem 4 by passing the threaded rod 11 through the positioning column 6 and the positioning groove 7.

[0028] In actual use, further facilitate the insertion of the lower bone stem 5 into the femoral marrow cavity, in the embodiment, the bottom end of the lower bone stem 5 is provided with a plug 12, a slot 13 is formed in the middle of the plug 12, the plug 12 is inserted into the femoral marrow cavity, which facilitates the insertion and positioning of the whole device, and the slot 13 provides space for the growth of the femur in the later stage, increasing the connection between the femur and the human body.

[0029] In actual use, further strengthen the connection between the upper bone stem 4 and the human body, in the embodiment, one side of the upper bone stem 4 is provided with a plurality of reinforcing stripes 14, which can strengthen the connection between the upper bone stem 4 and the human body and improve the stability of the whole through the reinforcing stripes 14 as the femur grows after long-term use.

[0030] In actual use, the adhesion of the upper bone stem 4 and the lower bone stem 5 is further increased, and in the embodiment, the outer wall of the upper bone stem 4 and the lower bone stem 5 is provided with a protrusion 15, and by providing the protrusion 15, the adhesion of the upper bone stem 4 and the lower bone stem 5 can be increased, thereby improving the stability of the overall installation.

[0031] In actual use, the positioning of the threaded rod 11 is further facilitated, and in the embodiment, the threaded rod 11 is provided at the end with a positioning cap 16, and the positioning cap 16 facilitates the positioning of the threaded rod 11.

[0032] In actual use, the fusion connection of the upper bone stem 4 with the human body in the later stage is further facilitated, and in the embodiment, a plurality of healing holes 17 are arranged on one side of the upper bone stem 4, and after long-term use of the upper bone stem 4 and the lower bone stem 5, the femur in the human body can grow into the plurality of healing holes 17, thereby strengthening the stability of the whole.

[0033] In actual use, the service life of the upper bone stem 4 and the lower bone stem 5 is further improved, and in the embodiment, the upper bone stem 4 and the lower bone stem 5 are both made of titanium alloy, and titanium has high corrosion resistance, chemical and physical stability, and does not affect the essence after long-term contact with humans, thereby improving the stability of the whole and increasing the service life of the upper bone stem 4 and the lower bone stem 5.

[0034] In order to explain the possible application scenarios, technical principles, specific implementation schemes, and the like of the present application, the following will be described in detail in combination with the specific embodiments listed and the accompanying drawings. The embodiments described herein are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0035] Although the embodiments of the present application have been shown and described, it can be understood by those of ordinary skill in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A multifunctional femoral stem prosthesis comprising a femoral head cup (1), a stem cone (2), a femoral head seat (3), an upper bone stem (4) and a lower bone stem (5), characterized in that: The bottom end of the femoral head cover (1) is provided with the stem cone (2), the bottom end of the stem cone (2) is connected with the femoral head seat (3), the bottom end of the femoral head seat (3) is connected with the top wall of the upper bone stem (4), the bottom end of the upper bone stem (4) is movably provided with the lower bone stem (5), the bottom wall of the upper bone stem (4) is provided with the positioning column (6), the top end of the lower bone stem (5) is provided with the positioning groove (7), the periphery of the positioning column (6) is uniformly provided with the positioning cylindrical strip (8), the periphery of the positioning groove (7) is uniformly provided with the positioning cylindrical groove (9), the positioning column (6) is matched with the positioning groove (7), the positioning cylindrical strip (8) is matched with the positioning cylindrical groove (9), the top end of the stem cone (2) is provided with the threaded hole (10), the threaded hole (10) extends to the lower bone stem (5) through the femoral head seat (3) and the upper bone stem (4), and the threaded hole (10) is provided with the threaded rod (11) in a threaded mode.

2. A multi-functional femoral stem prosthesis according to claim 1, characterized in that: The threaded hole (10) penetrates the positioning column (6) and the positioning groove (7) and is located at the central position of the positioning column (6) and the positioning groove (7).

3. A multi-functional femoral stem prosthesis according to claim 2, wherein: The bottom end of the lower bone stem (5) is provided with the plug (12), and the middle of the plug (12) is provided with the groove (13).

4. A multi-functional femoral stem prosthesis according to claim 3, characterized in that: One side of the upper bone stem (4) is provided with a plurality of reinforcing stripes (14).

5. A multi-functional femoral stem prosthesis according to claim 4, wherein: The outer walls of the upper bone stem (4) and the lower bone stem (5) are provided with the protrusions (15).

6. A multi-functional femoral stem prosthesis according to claim 5, characterized in that: The end of the threaded rod (11) is provided with the positioning cap (16).

7. A multi-functional femoral stem prosthesis according to claim 6, wherein: One side of the upper bone stem (4) is provided with a plurality of healing holes (17).

8. A multi-functional femoral stem prosthesis according to claim 7, characterized in that: The upper bone stem (4) and the lower bone stem (5) are made of titanium alloy.

Images