Proximal femur substitute

Abstract

The utility model relates to a proximal femur substitute, which comprises a proximal femur prosthesis, the proximal femur prosthesis comprises a proximal femur body, a neck part and a tuberosity part, the neck part is formed by extending outwards from one end of the proximal femur body, and a preset included angle is formed between the neck part and the axis of the proximal femur body; the tuberosity part is located on the other side, opposite to the neck part, of the proximal femur body, and the tuberosity part protrudes outwards from the proximal femur body; a plurality of first threading holes are formed in the tuberosity part, the first threading holes penetrate through the tuberosity part in the front-back side direction, the first threading holes are arc-shaped holes, suture needles can penetrate through the arc-shaped threading holes conveniently, surgical operation is facilitated, suture lines can be better fixed, and then muscles and soft tissues can be better combined.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a proximal femur replacement component. Background Art

[0002] Severe bone defects in the proximal femur caused by femoral head necrosis, proximal femoral tumors or accidents have a significant impact on the patient's motor function and may even be life-threatening in severe cases. Resection of the proximal femur and reconstruction with artificial materials are important means to solve severe bone defects.

[0003] In joint replacement surgery, it is inevitable to remove the attachment points of the ligaments. In order to reconstruct the movable function of the joint, the human tendon needs to be reconnected to the replaced joint prosthesis. Attachment reconstruction is the key to maximally restoring limb function. When the joint prosthesis is fixed, the tendons and ligaments are directly fixed to the prosthesis in a mechanical way. The ligament suture holes on the existing proximal femoral substitutes are all straight holes, and most of the existing suture needles are curved needles, which are not easy to operate during suturing and easily affect the suturing effect. In addition, the suture hole on the proximal femoral substitute on the trochanter side is relatively long, which limits vision during suturing, not only inconvenient for intraoperative operation, but also may lead to suture failure, prolonging the operation time. Utility Model Content

[0004] The utility model aims to provide a proximal femoral replacement piece which is convenient for suturing ligaments during surgery.

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

[0006] A proximal femoral replacement component includes a proximal femoral prosthesis, wherein the proximal femoral prosthesis includes a proximal femoral body, a neck and a trochanter, wherein:

[0007] The neck is formed by extending outward from one end of the proximal femoral body, and a preset angle exists between the neck and the axis of the proximal femoral body;

[0008] The trochanter is located on the other side of the proximal femoral body relative to the neck, and the trochanter bulges outward from the proximal femoral body; a plurality of first threading holes are opened on the trochanter, and the first threading holes penetrate the trochanter in the front-back direction, and the first threading holes are arc-shaped holes.

[0009] In one embodiment, the curvature of the first threading hole is matched with the outer surface curve of the tuberosity.

[0010] In one embodiment, the tuberosity is further provided with a plurality of window portions, each of which is provided corresponding to one of the first threading holes, and the window portion is recessed inward from the outer surface of the tuberosity and is connected to the corresponding first threading hole.

[0011] In one embodiment, the window portion is an elliptical rectangle, and its length is more than twice its width.

[0012] In one embodiment, the proximal femoral body is further provided with a second threading hole on the other side opposite to the trochanteric portion, the second threading hole penetrates the proximal femoral body along the anterior-posterior direction, and the second threading hole is an arc-shaped hole.

[0013] In one embodiment, an instrument operation hole is provided at the top end of the proximal femoral body, and the instrument operation hole is located between the neck and the tuberosity.

[0014] In one embodiment, the top of the proximal femoral body is a plane, and the upper portion of the tuberosity is flush with the plane.

[0015] In one embodiment, a pair of symmetrical side wings are provided on the side surface of the lower end of the proximal femoral body, and a limiting groove matching the medullary cavity extension handle is formed between the pair of side wings.

[0016] In one embodiment, the bottom of the proximal femoral body is provided with a mounting hole matched with the medullary cavity extension handle, and the mounting hole is a tapered hole with a Morse taper.

[0017] In one embodiment, the angle between the neck and the axis of the proximal femoral body is 132°.

[0018] The utility model adopts the above technical solution, which has the beneficial effect that the threading hole on the proximal femoral replacement provided by the utility model is an arc-shaped hole, which can cooperate with the suture needle to facilitate the passage of the suture needle, facilitate surgical operation, and also enable the suture to be better fixed, thereby allowing muscles and soft tissues to grow better. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic perspective view of a proximal femur replacement is shown.

[0020] Figure 2 A front view of a proximal femoral replacement is shown.

[0021] Figure 3 A side view of a proximal femoral replacement is shown.

[0022] Figure 4 A cross-sectional view of a proximal femur replacement is shown. DETAILED DESCRIPTION

[0023] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings so that the purpose, features and advantages of the present invention can be more clearly understood. It should be understood that the embodiments shown in the accompanying drawings are not intended to limit the scope of the present invention, but are only intended to illustrate the essential spirit of the technical solution of the present invention.

[0024] In the following description, certain specific details are set forth for the purpose of illustrating various disclosed embodiments to provide a thorough understanding of the various disclosed embodiments. However, those skilled in the relevant art will recognize that the embodiments may be practiced without one or more of these specific details. In other cases, well-known devices, structures, and techniques associated with the present application may not be shown or described in detail to avoid unnecessarily obscuring the description of the embodiments.

[0025] Unless the context requires otherwise, throughout the specification and claims, the word "comprise" and variations such as "include" and "have" should be construed in an open, inclusive sense, ie, should be interpreted as "including, but not limited to."

[0026] References throughout the specification to "one embodiment" or "an embodiment" indicate that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, the appearances of "in one embodiment" or "in an embodiment" in various places throughout the specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any manner in one or more embodiments.

[0027] As used in this specification and the appended claims, the singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise. It should be noted that the term "or" is generally employed in its sense including "and / or" unless the context clearly dictates otherwise.

[0028] In the following description, in order to clearly demonstrate the structure and working mode of the utility model, many directional words will be used for description, but the words "front", "back", "left", "right", "outside", "inside", "outward", "inward", "up", "down", etc. should be understood as convenient terms and should not be understood as restrictive terms.

[0029] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0030] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0031] like Figure 1 and Figure 2 As shown, the present embodiment provides a proximal femoral replacement part, which includes a proximal femoral prosthesis 1, which can be roughly divided into a proximal femoral body 11, a neck 12 and a tuberosity 13. Among them, the neck 12 is formed by extending outward from one end of the proximal femoral body 11, and there is a preset angle between the neck 12 and the axis of the proximal femoral body 11, and the specific angle can be specifically set according to the needs of the actual situation. In this embodiment, the angle between the neck 12 and the axis of the proximal femoral body 11 is 132°. The tuberosity 13 is located at the other side of the proximal femoral body 11 relative to the neck 12, and the tuberosity 13 bulges outward from the other end of the proximal femoral body 11. The proximal femoral prosthesis 1 has three types of designs: neutral type, left anteversion 15° and right anteversion 15°, to adapt to different surgical occasions. When the cement type is used for the medullary cavity extension handle, the neutral type can be selected for manual rotation to adjust the anteversion angle, or the anteversion type can be directly selected. When the biological type is used for the medullary cavity extension handle, if it is inconvenient to rotate the handle after interference fit, the forward-leaning type can be directly selected to facilitate surgical operations.

[0032] A plurality of first threading holes 131 are provided on the tuberosity 13, and the first threading holes 131 penetrate the tuberosity 13 in the front-back direction. The first threading holes 131 are arc-shaped holes, and their curvature is matched with the outer surface curve of the tuberosity 13. The arc-shaped first threading holes 131 can cooperate with the arc-shaped suture needle to facilitate the passage of the suture needle, facilitate surgical operation, and also enable the suture to be better fixed, thereby allowing the muscle and soft tissue to grow better.

[0033] See also Figure 3 and Figure 4, a plurality of window portions 132 are also provided on the tuberosity 13, each window portion 132 is provided corresponding to one of the first threading holes 131, the window portion 132 is provided to be recessed inward from the outer surface of the tuberosity 13, and is provided to be connected to the corresponding first threading hole 131, so as to form an observation window in the middle of the first threading hole 131 through which the interior of the first threading hole 131 can be observed. When performing suturing operations during surgery, the situation of the suture thread inside the first threading hole 131 can be observed through the window portion 132, which facilitates the doctor to perform suturing operations during surgery. The width of the window portion 132 is equivalent to the aperture of the first threading hole 131, and its length is greater than the width. The situation inside the first threading hole 131 can be better observed through the window portion 132. Figure 3 As shown, the window portion 132 in this embodiment is an elliptical rectangle, and its length is more than twice its width.

[0034] See also Figure 1 , Figure 2 and Figure 4 The proximal femoral body 11 is further provided with a second threading hole 14 on the other side opposite to the trochanter 13. The second threading hole 14 penetrates the proximal femoral body 11 along the front-back direction. The second threading hole 14 is also an arc-shaped hole, and its curvature is matched with the curvature of the arc-shaped suture needle to facilitate the passage of the suture needle, facilitate surgical operation, and also make the suture better fixed, so that the muscle and soft tissue grow better.

[0035] See also Figure 1 and Figure 4 The top of the proximal femoral body 11 is also provided with an instrument operation hole 15, which is located between the neck 12 and the tuberosity 13. The instrument operation hole 15 is a threaded hole for easy impact and removal of the prosthesis. The prosthesis can be installed and removed more conveniently using matching instruments.

[0036] See also Figure 1 , Figure 2 and Figure 4The top of the proximal femoral body 11 is a plane. Relative to the anatomical structure of the proximal femur, the trochanter 13 in this embodiment is cut off along the plane, so that the trochanter 13 does not exceed the top of the proximal femoral body 11 and is flush with the top of the proximal femoral body 11, so that the trochanter 13 will not block the instrument operation hole 15, which is convenient for the use of supporting instruments. The bottom of the proximal femoral body 11 is provided with an assembly hole 16 for matching with the medullary cavity extension handle. The assembly hole 16 is a tapered hole with a Morse taper, so that the proximal femoral body 11 can be assembled with the medullary cavity extension handle through the Morse taper, so as to facilitate the operation and fixation during the operation. Preferably, the lower end side of the proximal femoral body 11 is provided with symmetrical side wings 17, and a limiting groove 18 is formed between the side wings 17. The side wings 17 and the limiting groove 18 are matched with the corresponding structure on the medullary cavity extension handle to achieve the function of anti-rotation and limiting. In addition, the proximal femoral body 11 can be assembled by the top plane and the Morse taper between the medullary cavity extension handle to reduce the amount of osteotomy, allowing the patient to retain more bone parts, which is more conducive to the patient's recovery. The minimum amount of osteotomy of the proximal femoral replacement of this embodiment can be less than 90mm.

[0037] The preferred embodiments of the present invention have been described in detail above, but it should be understood that after reading the above teachings of the present invention, those skilled in the art may make various changes or modifications to the present invention. These equivalent forms also fall within the scope defined by the claims attached to this application.

Claims

1. A proximal femoral replacement, comprising a proximal femoral prosthesis, characterized in that: The proximal femoral prosthesis comprises a proximal femoral body, a neck and a trochanter, wherein: The neck is formed by extending outward from one end of the proximal femoral body, and a preset angle exists between the neck and the axis of the proximal femoral body; The trochanter is located on the other side of the proximal femoral body relative to the neck, and the trochanter bulges outward from the proximal femoral body; a plurality of first threading holes are opened on the trochanter, and the first threading holes penetrate the trochanter in the front-back direction, and the first threading holes are arc-shaped holes.

2. The proximal femur replacement according to claim 1, characterized in that: The curvature of the first threading hole is matched with the outer surface curve of the tuberosity.

3. The proximal femur replacement according to claim 1, characterized in that: The tuberosity is further provided with a plurality of window portions, each of which is arranged corresponding to one of the first threading holes, and the window portion is recessed inward from the outer surface of the tuberosity and is connected to the corresponding first threading hole.

4. The proximal femur replacement according to claim 3, characterized in that: The window portion is an elliptical rectangle, and its length is more than twice its width.

5. The proximal femur replacement according to claim 1, characterized in that: The proximal femoral body is further provided with a second threading hole on the other side opposite to the trochanteric portion. The second threading hole penetrates the proximal femoral body along the front-back direction, and the second threading hole is an arc-shaped hole.

6. The proximal femur replacement according to claim 1, characterized in that: An instrument operation hole is arranged at the top end of the proximal femoral body, and the instrument operation hole is located between the neck and the tuberosity.

7. The proximal femur replacement according to claim 1, characterized in that: The top of the proximal femoral body is a plane, and the upper part of the tuberosity is flush with the plane.

8. The proximal femur replacement according to claim 1, characterized in that: A pair of symmetrical side wings are arranged on the side surface of the lower end of the proximal femoral body, and a limiting groove matching the medullary cavity extension handle is formed between the pair of side wings.

9. The proximal femur replacement according to claim 1, characterized in that: The bottom of the proximal femoral body is provided with an assembly hole matched with the medullary cavity extension handle, and the assembly hole is a tapered hole with Morse taper.

10. The proximal femur replacement according to claim 1, characterized in that: The angle between the neck and the axis of the proximal femoral body is 132°.

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