Hip joint prosthesis for femoral intertrochanteric fracture

Abstract

The utility model discloses a hip joint prosthesis for femoral intertrochanteric fracture, and belongs to the technical field of intertrochanteric fracture treatment. The hip joint prosthesis solves the problems that a greater trochanter part cannot be firmly fixed by an existing hip joint prosthesis, so that greater trochanter fracture is not healed or inclines inwards, and the prosthesis is dislocated. The femoral prosthesis structure specifically comprises a femoral prosthesis and a tuberosity fixing part, wherein the tuberosity fixing part is connected to the top of the femoral prosthesis; the bottom of the femoral prosthesis is fixed in the center of a femoral medullary cavity; and the tuberosity fixing piece is used for fixing the greater tuberosity. According to the hip joint prosthesis, the tuberosity fixing part is designed on the femoral prosthesis, when the hip joint prosthesis is installed in the body of a patient, the tuberosity fixing part can specially fix greater tuberosity, and even if the hip joint prosthesis is installed at a low position or the greater tuberosity of the patient is high, the tuberosity fixing part can well fix the greater tuberosity; in addition, the tuberosity fixing piece is designed on the inner side of the greater tuberosity to block the greater tuberosity, and the greater tuberosity can be prevented from inclining towards the inner side of the pelvic bone.

Description

Technical Field

[0001] The utility model relates to the technical field of intertrochanteric fracture treatment, in particular to a hip joint prosthesis used for intertrochanteric fracture of femur. Background Art

[0002] For patients with intertrochanteric fractures who need total hip replacement or hemiarthroplasty, the existing hip prosthesis does not have a component specifically designed to fix the greater trochanter. Therefore, when the existing hip prosthesis is installed in the patient's body, it does not have a good fixation effect on the patient's greater trochanter. When the hip prosthesis is installed relatively low or the greater trochanter of some patients is relatively high, the existing hip prosthesis does not have a good fixation effect on the greater trochanter, which can easily cause the greater trochanter of the patient to tilt inward, or the fracture does not heal, thereby causing hip dislocation, such as Figure 1 In order to firmly fix the greater trochanter, in the prior art, an additional fixing device is used to fix the greater trochanter to prevent it from tilting, such as Figure 2 As shown; this will expand the surgical incision, increase the number of surgical steps and trauma, and correspondingly increase the cost and occurrence of complications.

[0003] Therefore, the utility model provides a hip joint prosthesis which can play a good fixing effect on the greater trochanter and can prevent the greater trochanter from tilting inward. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a hip prosthesis for intertrochanteric fractures of the femur to solve the problem that the existing hip prosthesis cannot properly fix the greater trochanter, thereby causing the greater trochanter to tilt toward the inside of the pelvis or non-healing of the fracture.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A hip joint prosthesis for intertrochanteric fracture of the femur comprises a femoral prosthesis and a trochanteric fixer, wherein the trochanteric fixer is connected to the top of the femoral prosthesis; the bottom of the femoral prosthesis is fixed to the center of the medullary cavity of the femur; and the trochanteric fixer is used to fix the greater trochanter.

[0007] In this solution, a trochanter fixation component is designed on the femoral prosthesis. When the hip prosthesis is installed in the patient's body, the trochanter fixation component can specifically fix the greater trochanter. Even if the hip prosthesis is installed low or the patient's greater trochanter is high, the greater trochanter can be well fixed. In addition, the trochanter fixation component is designed to block the greater trochanter on the inner side of the greater trochanter to prevent the greater trochanter from tilting inward.

[0008] Furthermore, a femoral neck prosthesis is provided on a side of the femoral prosthesis away from the greater trochanter, and the end of the femoral neck prosthesis is connected to the femoral head.

[0009] In this solution, a femoral neck prosthesis is designed to be connected to the femoral head and is easy to install.

[0010] Furthermore, a through hole is formed on the trochanter fixing piece, a screw is installed in the through hole, a thread groove is formed on the top of the femoral prosthesis, and the screw passes through the through hole and is threadedly connected with the thread groove.

[0011] In this solution, the trochanter fixation component is installed on the femoral prosthesis by means of screws, which is convenient to install and has a stable connection.

[0012] Furthermore, a plurality of fixing holes are provided on the trochanter fixing piece, and titanium cables are passed through the fixing holes; the titanium cables pass through the fixing holes to connect the trochanter fixing piece and the greater trochanter.

[0013] In this solution, a titanium cable is passed through the fixing hole to bind the trochanter fixing piece, which can achieve a good fixing effect on the trochanter fixing piece and prevent the titanium cable from sliding along the trochanter fixing piece, resulting in a loose fixation of the trochanter fixing piece.

[0014] Furthermore, 3-4 fixing holes are provided, and the 3-4 fixing holes are evenly distributed in sequence from top to bottom along the tuberosity fixing piece.

[0015] In this solution, 3-4 fixing holes are designed to be evenly distributed from top to bottom, so that the trochanter fixing piece can be integrally bound to the greater trochanter along its height direction, and the connection is stable.

[0016] Furthermore, a limiting block is provided at the bottom of the trochanter fixing piece, and the limiting block is embedded in a limiting groove at the top of the femoral prosthesis.

[0017] In this solution, a limiting block is provided and embedded in the limiting groove to achieve relative fixation of the trochanter fixing member and the femoral prosthesis, thereby preventing the trochanter fixing member from rotating when the prosthesis is installed.

[0018] Furthermore, the height of the tuberosity fixing piece ranges from 2.0 cm to 5.0 cm.

[0019] In this solution, the trochanter fixation device with a height range of 2.0 cm-5.0 cm can be suitable for patients of various ages or various bone sizes.

[0020] Furthermore, the height of the tuberosity fixing piece is 2.0 cm, 2.5 cm, 3.0 cm, 3.5 cm, 4.0 cm, 4.5 cm or 5.0 cm.

[0021] In this solution, trochanter fixators of various specifications and sizes are designed. During treatment, the trochanter fixator of the appropriate size can be directly selected according to the required specifications, which is convenient to use.

[0022] Furthermore, a positioning hook is provided at the top of the trochanter fixing piece, and the positioning hook is connected to the top of the greater trochanter.

[0023] In this solution, the trochanter fixing member can be better fixed to the greater trochanter by the positioning hook.

[0024] The beneficial effects of the utility model are:

[0025] The hip joint prosthesis for intertrochanteric fracture provided by the utility model is designed to connect the femoral prosthesis and the trochanteric fixation piece, and the trochanteric fixation piece is specifically used to fix the greater trochanter of the patient, and can play a good fixing effect on the greater trochanter of the patient; at the same time, the trochanteric fixation piece can also prevent the greater trochanter from tilting inward; compared with the prior art that uses other equipment to fix the greater trochanter, the fixation effect on the greater trochanter can be achieved only by the hip joint prosthesis, which simplifies the treatment equipment and improves the treatment efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the structure of a hip joint prosthesis in the prior art;

[0027] Figure 2 It is a schematic diagram of the structure of a fixing device for the greater trochanter in the prior art;

[0028] Figure 3 The utility model is a schematic diagram of the structure of a hip joint prosthesis used for intertrochanteric fracture of the femur.

[0029] Reference numerals:

[0030] 1. Trochanter fixation device; 11. Fixation hole; 12. Titanium cable; 13. Limit block; 14. Positioning hook; 2. Femoral prosthesis; 3. Femur; 4. Greater trochanter; 5. Femoral neck prosthesis; 6. Femoral head. DETAILED DESCRIPTION

[0031] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments. The specific implementation of the utility model is described below to facilitate the understanding of the utility model by those skilled in the art, but it should be clear that the utility model is not limited to the scope of the specific implementation. For those of ordinary skill in the art, as long as various changes are within the spirit and scope of the utility model defined and determined by the attached claims, these changes are obvious, and all inventions and creations conceived using the utility model are protected.

[0032] like Figure 3 As shown, this embodiment provides a hip joint prosthesis for intertrochanteric fractures of the femur, and the hip joint prosthesis is provided with a trochanter fixing member 1 specifically used for fixing the greater trochanter of the patient, which can play a good fixing effect on the greater trochanter of the patient; and the trochanter fixing member 1 can limit the greater trochanter and prevent the greater trochanter from tilting inward; it specifically includes:

[0033] Femoral prosthesis 2 and trochanteric fixation device 1;

[0034] Among them, the trochanter fixer 1 is connected to the top of the femoral prosthesis 2; the bottom of the femoral prosthesis 2 is fixed to the center of the medullary cavity of the femur 3; the trochanter fixer 1 is used to fix the greater trochanter 4; it can also fix the greater trochanter 4 when the hip joint prosthesis is installed low or the patient's own greater trochanter 4 is high.

[0035] A femoral neck prosthesis 5 is provided on the side of the femoral prosthesis 2 away from the greater trochanter 4, and the end of the femoral neck prosthesis 5 is connected to the femoral head 6; the femoral neck prosthesis 5 designed to be connected to the femoral head 6 is easy to install.

[0036] A through hole is formed on the trochanter fixer 1, in which a screw is installed; a threaded groove is formed on the top of the femoral prosthesis 2, and the screw passes through the through hole and is threadedly connected to the threaded groove; the trochanter fixer 1 is installed on the femoral prosthesis 2 by means of the screw, which is easy to install and has a stable connection.

[0037] A plurality of fixing holes 11 are provided on the trochanter fixing piece 1, and titanium cables 12 are passed through the fixing holes 11; the titanium cables 12 pass through the fixing holes 11 to connect the trochanter fixing piece 1 and the greater trochanter 4; the titanium cables 12 are passed through the fixing holes 11 to bundle the trochanter fixing piece 1, which can achieve a good fixing effect on the trochanter fixing piece 1 and prevent the titanium cables 12 from sliding along the trochanter fixing piece 1, resulting in the trochanter fixing piece 1 being not firmly fixed.

[0038] There are 3-4 fixing holes 11, and the 3-4 fixing holes 11 are evenly distributed from top to bottom along the trochanter fixing piece 1; this design can integrally bind the trochanter fixing piece 1 to the greater trochanter 4 along its height direction, and the connection is stable.

[0039] A limit block 13 is provided at the bottom of the trochanter fixation member 1, and the limit block is embedded in the limit groove at the top of the femoral prosthesis 2; the limit block is set to be embedded in the limit groove to achieve relative fixation of the trochanter fixation member 1 and the femoral prosthesis 2 to prevent the trochanter fixation member 1 from rotating when the prosthesis is installed.

[0040] The height range of the trochanter fixation piece 1 is 2.0 cm-5.0 cm; the trochanter fixation piece 1 within the height range of 2.0 cm-5.0 cm can be suitable for patients of various ages or with various bone sizes.

[0041] The height of the trochanter fixer 1 is 2.0 cm, 2.5 cm, 3.0 cm, 3.5 cm, 4.0 cm, 4.5 cm or 5.0 cm. The trochanter fixers 1 are designed in various sizes and specifications. During treatment, the trochanter fixer 1 of the appropriate size can be directly selected according to the required specifications, which is convenient to use.

[0042] A positioning hook 14 is provided on the top of the trochanter fixing member 1 , and the positioning hook 14 is connected to the top of the greater trochanter 4 ; the trochanter fixing member 1 can be better fixed on the greater trochanter 4 through the positioning hook 14 .

[0043] The working principle of this embodiment:

[0044] When the hip joint prosthesis provided in this embodiment is used for actual treatment of intertrochanteric fractures of the femur, the doctor selects a trochanteric fixation component 1 of appropriate size according to the size of the osteotomy site, and assembles it on the femoral prosthesis 2 by screws, and the hip joint prosthesis is prepared.

[0045] During installation, the femoral prosthesis 2 is fixed to the center of the medullary cavity of the femur 3 so that the trochanteric fixer 1 fits on the greater trochanter 4; the titanium cable 12 is passed through the fixing hole 11, and the trochanteric fixer 1 is tied to the greater trochanter 4 through the titanium cable 12, and the installation is completed.

[0046] Those skilled in the art will appreciate that the embodiments herein are intended to help readers understand the principles of the present invention, and should be understood that the protection scope of the present invention is not limited to such specific statements and embodiments. Those skilled in the art can make various other specific variations and combinations based on the technical inspiration disclosed in the present invention without departing from the essence of the present invention, and these variations and combinations are still within the protection scope of the present invention.

Claims

1. A hip joint prosthesis for intertrochanteric fractures of the femur, characterized in that: It comprises a femoral prosthesis (2) and a trochanter fixing piece (1), wherein the trochanter fixing piece (1) is connected to the top of the femoral prosthesis (2); the bottom of the femoral prosthesis (2) is fixed to the center of the medullary cavity of the femur (3); and the trochanter fixing piece (1) is used to fix the greater trochanter (4); The trochanter fixing piece (1) is provided with a through hole, a screw is installed in the through hole, a thread groove is provided at the top of the femoral prosthesis (2), and the screw passes through the through hole and is threadedly connected to the thread groove; The trochanter fixing piece (1) is provided with a plurality of fixing holes (11), and titanium cables (12) are passed through the fixing holes (11); the titanium cables (12) pass through the fixing holes (11) to connect the trochanter fixing piece (1) and the greater trochanter (4).

2. The hip joint prosthesis for intertrochanteric fracture according to claim 1, characterized in that: A femoral neck prosthesis (5) is provided on a side of the femoral prosthesis (2) away from the greater trochanter (4), and an end of the femoral neck prosthesis (5) is connected to a femoral head (6).

3. The hip joint prosthesis for intertrochanteric fracture according to claim 1, characterized in that: The fixing holes (11) are provided in a number of 3 to 4, and the 3 to 4 fixing holes (11) are evenly distributed in sequence from top to bottom along the tuberosity fixing piece (1).

4. The hip joint prosthesis for intertrochanteric fracture according to claim 1, characterized in that: A limiting block (13) is provided at the bottom of the trochanter fixing member (1), and the limiting block is embedded in a limiting groove at the top of the femoral prosthesis (2).

5. The hip joint prosthesis for intertrochanteric fracture according to claim 4, characterized in that: The height of the tuberosity fixing member (1) ranges from 2.0 cm to 5.0 cm.

6. The hip joint prosthesis for intertrochanteric fracture according to claim 5, characterized in that: The height of the tuberosity fixing member (1) is 2.0 cm, 2.5 cm, 3.0 cm, 3.5 cm, 4.0 cm, 4.5 cm or 5.0 cm.

7. The hip joint prosthesis for intertrochanteric fracture according to any one of claims 1 to 6, characterized in that: A positioning hook (14) is provided at the top of the trochanter fixing piece (1), and the positioning hook is connected to the top of the greater trochanter (4).

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