Hip prosthesis for preserving the greater trochanter of the femur

Abstract

The utility model discloses a kind of hip joint prostheses for retaining femoral greater trochanter, including femoral proximal end prosthesis, bone healing structure, connecting rod and femoral stem. Femoral proximal end prosthesis includes femoral neck prosthesis and greater trochanter connecting part, preset included angle is formed between the two, greater trochanter connecting part is used for resetting retained femoral greater trochanter;Bone healing structure is arranged at the outside of preset included angle, and is connected with retained femoral greater trochanter by bone growth mechanism;Connecting rod is connected with the bottom end of femoral proximal end prosthesis;Femoral stem is connected with the bottom end of connecting rod, for inserting into femoral medullary cavity.In installation process, perfect femoral greater trochanter does not need to be removed, femoral greater trochanter is successfully retained, so that patient's gluteus medius and vastus lateralis muscle can be retained, the destruction to the stop of gluteus medius and vastus lateralis muscle is avoided, so as to improve the functional recovery effect after operation. The connection of hip joint prosthesis and retained femoral greater trochanter is realized by bone healing structure, and the stability and durability of connection are improved.

Description

Technical Field

[0001] This utility model relates to the field of hip joint prosthesis technology, and in particular to a hip joint prosthesis for preserving the greater trochanter of the femur. Background Technology

[0002] In clinical practice, total hip replacement surgery is commonly used to treat bone tumors, severe fractures, and large proximal femoral defects caused by infection. During this surgery, the surgeon removes the femoral head, neck, greater trochanter, and necrotic bone shaft, and implants an artificial femoral head, neck, greater trochanter, and stem. It is worth noting that the artificial greater trochanter usually has pre-designed holes to connect it to the insertion points of the gluteus medius and vastus lateralis muscles via sutures.

[0003] However, in some cases where the greater trochanter of the femur is intact, such as when a bone tumor has not invaded the greater trochanter, traditional tumor-associated hip arthroplasty would result in the unnecessary removal of the healthy greater trochanter. This practice can damage the insertion points of the gluteus medius and vastus lateralis muscles, affecting the patient's postoperative functional recovery. Furthermore, the current method of suturing the artificial greater trochanter to the insertion points of the gluteus medius and vastus lateralis muscles is prone to breakage, thus affecting the stability and durability of the connection.

[0004] Therefore, there is an urgent need for a dedicated hip prosthesis for patients with intact greater trochanter of the femur. Utility Model Content

[0005] To solve the above-mentioned technical problems, the purpose of this utility model is to provide a hip joint prosthesis for preserving the greater trochanter of the femur, so as to preserve the greater trochanter of the femur and avoid damaging the insertion points of the gluteus medius and vastus lateralis muscles.

[0006] The technical solution provided by this utility model is as follows:

[0007] A hip prosthesis for preserving the greater trochanter of the femur, comprising:

[0008] A proximal femoral prosthesis includes a femoral neck prosthesis located at the upper end and a greater trochanter connection located at the lower end. A preset angle is formed between the femoral neck prosthesis and the greater trochanter connection. The greater trochanter connection is used to reposition and preserve the greater trochanter of the femur.

[0009] The bone healing structure is located on the outer side of the preset angle and is connected to the preserved greater trochanter of the femur through a bone ingrowth mechanism.

[0010] The connecting rod is connected to the bottom end of the proximal femoral prosthesis;

[0011] The femoral stem is connected to the bottom end of the connecting rod and is used for insertion into the femoral medullary cavity.

[0012] Furthermore, the bone healing structure is a porous structure.

[0013] Furthermore, the bone healing structure is a hydroxyapatite coating.

[0014] Furthermore, the included angle between the femoral neck prosthesis and the greater trochanter connection is 127°.

[0015] Furthermore, the length of the femoral stem is adjustable.

[0016] Furthermore, the proximal femoral prosthesis is detachably connected to the connecting rod.

[0017] Furthermore, the connecting rod is detachably connected to the femoral stem.

[0018] Compared with the prior art, the hip joint prosthesis for preserving the greater trochanter of the femur provided by this utility model embodiment has at least the following technical advantages:

[0019] The hip joint prosthesis includes a proximal femoral prosthesis, a bone healing structure, a connecting rod, and a femoral stem. The proximal femoral prosthesis comprises a femoral neck prosthesis at the upper end and a greater trochanter connector at the lower end, forming a pre-defined angle between them. The greater trochanter connector is used to reduce the preserved greater trochanter. The bone healing structure is located on the outer side of the pre-defined angle and connects to the preserved greater trochanter via bone ingrowth. The connecting rod connects to the bottom end of the proximal femoral prosthesis, and the femoral stem connects to the bottom end of the connecting rod. This design eliminates the raised artificial greater trochanter structure and its pre-defined holes. During installation, the intact greater trochanter is not removed, successfully preserving it and allowing the patient's gluteus medius and vastus lateralis muscles to be retained. This avoids damage to the insertion points of the gluteus medius and vastus lateralis muscles, thereby improving postoperative functional recovery. The bone healing structure achieves the connection between the hip joint prosthesis and the preserved greater trochanter, avoiding the breakage risk associated with existing techniques that suture the artificial greater trochanter to the insertion points of the gluteus medius and vastus lateralis muscles, thus improving the stability and durability of the connection. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a front view structural diagram of a hip joint prosthesis according to an embodiment of the present invention;

[0022] Figure 2This is a side view of a hip joint prosthesis according to an embodiment of the present invention.

[0023] Figure label:

[0024] 10. Proximal femoral prosthesis; 11. Femoral neck prosthesis; 12. Greater trochanteric connector; 13. Femoral connector; 20. Bone healing structure; 30. Connecting rod; 40. Femoral stem. Detailed Implementation

[0025] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0026] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly set on the other component; when a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to the other component.

[0027] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" or "several" means two or more, unless otherwise explicitly specified.

[0029] It should be noted that the structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which this utility model can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and purposes that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0030] Please refer to the attached document. Figure 1 and attached Figure 2 As shown, one embodiment of this utility model provides a hip joint prosthesis for preserving the greater trochanter of the femur, including a proximal femoral prosthesis 10, a bone healing structure 20, a connecting rod 30, and a femoral stem 40. The proximal femoral prosthesis 10 includes a femoral neck prosthesis 11 at the upper end and a greater trochanter connecting portion 12 at the lower end, forming a predetermined angle between them. The greater trochanter connecting portion 12 is used to reposition the preserved greater trochanter of the femur. The bone healing structure 20 is located on the outer side of the predetermined angle and connects to the preserved greater trochanter of the femur via a bone ingrowth mechanism. The connecting rod 30 is connected to the bottom end of the proximal femoral prosthesis 10. The femoral stem 40 is connected to the bottom end of the connecting rod 30 and is used for insertion into the femoral medullary cavity.

[0031] In this embodiment, the hip joint prosthesis includes a proximal femoral prosthesis 10, a bone healing structure 20, a connecting rod 30, and a femoral stem 40. The proximal femoral prosthesis 10 includes a femoral neck prosthesis 11 located at the upper end and a greater trochanter connecting portion 12 located at the lower end, forming a preset angle between them. The greater trochanter connecting portion 12 is used to reposition the preserved greater trochanter of the femur. The bone healing structure 20 is located on the outer side of the preset angle and connects to the preserved greater trochanter of the femur through a bone ingrowth mechanism. The connecting rod 30 is connected to the bottom end of the proximal femoral prosthesis 10, and the femoral stem 40 is connected to the bottom end of the connecting rod 30. This design eliminates the raised artificial greater trochanter of the femur and its preset holes. During installation, it is not necessary to remove the intact greater trochanter of the femur, thus successfully preserving the greater trochanter of the femur. This allows the patient's gluteus medius and vastus lateralis muscles to be preserved, avoiding damage to the insertion points of the gluteus medius and vastus lateralis muscles, thereby improving the postoperative functional recovery effect. The bone healing structure 20 achieves the connection between the hip joint prosthesis and the preserved greater trochanter of the femur, avoiding the breakage risk caused by the existing connection method of suturing the artificial greater trochanter of the femur to the insertion points of the gluteus medius and vastus lateralis muscles, thereby improving the stability and durability of the connection.

[0032] In some optional embodiments, the bone healing structure 20 is a porous structure. The porous structure promotes bone tissue growth and healing, thereby enhancing the connection strength with the preserved greater trochanter of the femur and providing better postoperative functional recovery for the patient. Specifically, the porous structure has a large specific surface area and good permeability, which allows osteocytes and nutrients to more easily penetrate into the bone healing area, promoting new bone formation. Supported by the porous structure, bone tissue can grow within its pores, achieving effective integration with surrounding bone tissue.

[0033] In some optional embodiments, the bone healing structure 20 is a hydroxyapatite coating. Hydroxyapatite is a mineral similar in composition to human bone, which can effectively promote the attachment and proliferation of osteocytes, thereby accelerating the bone healing process and improving the patient's postoperative recovery speed. Specifically, the microstructure and chemical properties of the hydroxyapatite coating enable osteocytes to attach rapidly and form an extracellular matrix, which provides the necessary support for new bone formation. In addition, the bioactivity of the hydroxyapatite coating can stimulate the proliferation and differentiation of osteocytes, thereby accelerating the bone healing process.

[0034] In some optional embodiments, the included angle between the femoral neck prosthesis 11 and the greater trochanter connection 12 is 127°. The 127° angle design can better simulate the natural anatomical structure of the human body, allowing the femoral neck prosthesis 11 to form a more ideal integration with the surrounding bone and soft tissues after implantation.

[0035] In some optional embodiments, the length of the femoral stem 40 is adjustable. This adjustable length design provides greater flexibility and adaptability for hip prosthesis implantation, effectively meeting the needs of different patients and improving prosthesis functionality.

[0036] In some optional embodiments, a femoral connector 13 is provided at the upper end of the femoral neck prosthesis 11. The femoral connector 13 provides a reliable fixation mechanism for the hip joint prosthesis, reducing potential displacement or loosening of the hip joint prosthesis during activity and improving overall stability. The femoral connector 13 can be made of a biocompatible ceramic material, which not only enhances the strength of the connection but also reduces rejection reactions with surrounding tissues, promoting postoperative healing.

[0037] In some alternative embodiments, the proximal femoral prosthesis 10 is detachably connected to the femoral stem 40. Specifically, the proximal femoral prosthesis 10 and the femoral stem 40 are connected in a tapered manner.

[0038] In some alternative embodiments, the connecting rod 30 is detachably connected to the femoral stem 40. Specifically, the connecting rod 30 and the femoral stem 40 are connected in a tapered manner.

[0039] The mechanism of this invention is as follows:

[0040] During the installation of the hip prosthesis, the femoral stem 40 is inserted into the femoral medullary cavity. The preserved greater trochanter of the femur and its attached gluteus maximus and vastus lateralis muscles are repositioned to the bone healing structure 20. Through the tensile force applied by the preserved greater trochanter of the femur, a more stable hip joint structure and abduction lever arm are ultimately formed. At the same time, the bone healing structure 20 utilizes the bone ingrowth mechanism to enable the preserved greater trochanter of the femur to form a stable biological bone ingrowth fixation structure with the greater trochanteric connection 12, providing the possibility for the integration of the abductor muscles with the hip prosthesis, thereby improving the function and stability of the hip joint.

[0041] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A hip joint prosthesis for preserving the greater trochanter of the femur, characterized in that, include: A proximal femoral prosthesis includes a femoral neck prosthesis located at the upper end and a greater trochanter connection located at the lower end. A preset angle is formed between the femoral neck prosthesis and the greater trochanter connection. The greater trochanter connection is used to reposition and preserve the greater trochanter of the femur. The bone healing structure is located on the outer side of the preset angle and is connected to the preserved greater trochanter of the femur through a bone ingrowth mechanism. The connecting rod is connected to the bottom end of the proximal femoral prosthesis; The femoral stem is connected to the bottom end of the connecting rod and is used for insertion into the femoral medullary cavity.

2. The hip joint prosthesis for preserving the greater trochanter of the femur according to claim 1, characterized in that, The bone healing structure is a porous structure.

3. The hip joint prosthesis for preserving the greater trochanter of the femur according to claim 1, characterized in that, The bone healing structure is a hydroxyapatite coating.

4. The hip joint prosthesis for preserving the greater trochanter of the femur according to claim 1, characterized in that, The included angle between the femoral neck prosthesis and the greater trochanter connection is 127°.

5. The hip joint prosthesis for preserving the greater trochanter of the femur according to claim 1, characterized in that, The length of the femoral stem is adjustable.

6. The hip joint prosthesis for preserving the greater trochanter of the femur according to claim 1, characterized in that, The proximal femoral prosthesis is detachably connected to the connecting rod.

7. The hip joint prosthesis for preserving the greater trochanter of the femur according to claim 1, characterized in that, The connecting rod is detachably connected to the femoral stem.

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