Bone filling prosthesis for treating local bone defect of knee joint

Abstract

The utility model relates to a bone filling prosthesis for treating local bone defects of knee joints, which comprises a prosthesis body, the prosthesis body is arranged to be a conical truncated cone column convenient for implanting the prosthesis body into cancellous bone, the prosthesis body forms a bone trabecula structure, and the prosthesis body is provided with a plurality of pores; the prosthesis body is of a conical truncated cone structure formed by a truncated cone column, and the prosthesis body can be conveniently implanted into the cancellous bone through the end, facing the taper angle side, of the prosthesis body. In the implanting process, the device can also form good press fit with the cancellous bone, the cancellous bone is further tamped, and good initial stability and bone ingrowth conditions are provided; the bone trabecula structure formed by the prosthesis body is beneficial to the ingrowth of new bone tissues, the integration of the prosthesis and surrounding bone tissues is promoted, and good biological reconstruction can be carried out on local bone defects of the knee joint.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to a bone filling prosthesis for treating local bone defects of knee joints. Background Art

[0002] During total knee replacement, bone defects of the femur and tibial plateau are quite common. If the bone defects are not properly treated, it will affect the stability of the key prosthesis. Therefore, how to deal with knee bone defects is still challenging for clinicians.

[0003] Traditional methods for treating bone defects include morselized bone grafting and bone cement filling, but these methods have their own limitations. The integration time between the new bone tissue and the implanted filler is long, and the implanted filler has poor strength and cannot provide strong support. Summary of the invention

[0004] In view of at least one of the problems in the above-mentioned prior art, the purpose of the present invention is to provide a bone filling prosthesis for treating local bone defects of the knee joint, which has a reasonable structure, firm initial fixation, and improved mechanical strength and bone ingrowth ability.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A bone filling prosthesis for treating local bone defects of the knee joint comprises a prosthesis body, wherein the prosthesis body is configured as a tapered truncated cone column for facilitating implantation of the prosthesis body into cancellous bone, and the prosthesis body forms a trabecular structure; the prosthesis body is provided with a plurality of pores for facilitating the growth of new bone tissue and promoting the integration of the prosthesis body with surrounding bone tissue.

[0007] Preferably, the pores are configured as honeycomb holes.

[0008] Preferably, the frustum column is a conical column, and the diameters of its two end faces are unequal.

[0009] Preferably, the outer wall of the prosthesis body is provided with a plurality of barbs, and the direction of the barbs is consistent with the direction in which the prosthesis body is implanted into the cancellous bone.

[0010] Preferably, the prosthesis body is configured as a tantalum metal part.

[0011] The utility model adopts the above technical solution, which has the following advantages:

[0012] 1. The utility model provides a bone filling prosthesis for treating local bone defects of the knee joint. The prosthesis body adopts a conical column to form a truncated cone structure with a taper, which is convenient for implanting the prosthesis body into the cancellous bone through its end portion facing the cone angle. During the implantation process, it can also form a good press fit with the cancellous bone, further consolidate the cancellous bone, and provide good initial stability and bone ingrowth conditions. The trabecular structure formed by the prosthesis body is provided with a number of pores, which is conducive to the ingrowth of new bone tissue, promotes the integration of the prosthesis and the surrounding bone tissue, and can perform good biological reconstruction of the local bone defect of the knee joint.

[0013] 2. The bone filling prosthesis provided by the utility model for treating local bone defects of the knee joint has barbs on the outer wall of the prosthesis body, which can ensure that the prosthesis body will not easily fall out of the cancellous bone, thereby ensuring better implantation effect and stable position.

[0014] 3. The bone filling prosthesis for treating local bone defects of the knee joint provided by the utility model can be made of tantalum metal material, so that the surface of the prosthesis body has good porosity and forms a good trabecular structure, has better biocompatibility, biomechanical strength, bone ingrowth ability and corrosion resistance, and is more conducive to the ingrowth of new bone tissue. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic structural diagram of a bone filling prosthesis for treating local bone defects of a knee joint provided by an embodiment of the utility model.

[0016] Figure 2 It is a schematic diagram of the structure of a bone filling prosthesis for treating a local bone defect of a knee joint provided by an embodiment of the utility model in use state.

[0017] Reference numerals in the figures:

[0018] 101 is the local bone tissue of the knee joint, 1 is the prosthesis body, and 110 is the pore. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the system or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0021] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "assembly", "setting", and "connection" 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 an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] The utility model provides a bone filling prosthesis for treating local bone defects of the knee joint. The prosthesis body adopts a conical column to form a truncated cone structure with a taper, which is convenient for implanting the prosthesis body into the cancellous bone through its end portion facing the cone angle side, and compacting the cancellous bone, providing good initial stability and bone ingrowth conditions; the prosthesis body is provided with a plurality of pores, which is conducive to improving the bone ingrowth ability.

[0023] Below, the embodiments of the utility model are described in detail with reference to the accompanying drawings.

[0024] Example

[0025] like Figure 1 As shown, the present embodiment provides a bone filling prosthesis for treating local bone defects of the knee joint, comprising a prosthesis body 1, wherein the prosthesis body 1 is configured as a tapered truncated cone column for facilitating the implantation of the prosthesis body 1 into cancellous bone, and the prosthesis body 1 forms a trabecular structure, which refers to a loose and porous structure that is structurally like trabeculae and is interconnected and interconnected.

[0026] like Figure 2 As shown, in the bone filling prosthesis for treating local bone defects of the knee joint of this embodiment, the prosthesis body 1 adopts a truncated cone column to form a truncated cone structure with a taper, that is, the truncated cone column is a conical table, and the diameters of its two end faces are not equal. The truncated cone column can more easily implant the prosthesis body 1 into the cancellous bone through its end facing the cone angle; during the implantation process of the prosthesis body 1, the prosthesis body 1 can form a good press fit with the cancellous bone, further compact the cancellous bone, and provide good initial stability and bone ingrowth conditions.

[0027] like Figure 1As shown, the prosthesis body 1 can be specifically provided with a plurality of pores 110 to improve the bone ingrowth ability, and the pores 110 are provided as honeycomb holes to ensure the porosity of the prosthesis body 1 to form a trabecular structure, so as to be close to the structure of cancellous bone, facilitate the ingrowth of new bone tissue, and promote the integration of the prosthesis body 1 with the surrounding bone tissue.

[0028] The prosthesis body 1 is configured as a tantalum metal part, and its material structure is close to cancellous bone, so that the prosthesis body 1 forms a good trabecular structure, ensuring that new bone tissue grows into the prosthesis body 1. The prosthesis body 1 can not only provide strong support, but also promote the integration of the prosthesis body 1 with the surrounding bone tissue, thereby achieving a good biological reconstruction of the bone defect in the sciatic region of the acetabulum.

[0029] The outer wall of the prosthesis body 1 is provided with a plurality of barbs 120. The direction of the barbs is consistent with the direction in which the prosthesis body 1 is implanted into the cancellous bone. When the prosthesis body 1 is implanted into the cancellous bone, the barbs 120 can ensure that the prosthesis body 1 is smoothly implanted along its forward direction. After the implantation is completed, due to the presence of the barbs 120, it can be ensured that the prosthesis body 1 will not easily fall out of the cancellous bone, which can ensure a better implantation effect and a stable position.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A bone filling prosthesis for treating local bone defects of the knee joint, characterized in that: The prosthesis comprises a prosthesis body (1), wherein the prosthesis body (1) is configured as a tapered truncated cone column for facilitating implantation of the prosthesis body (1) into cancellous bone, and the prosthesis body (1) forms a trabecular structure; the prosthesis body (1) is provided with a plurality of pores (110) for facilitating the growth of new bone tissue and promoting the integration of the prosthesis body (1) with surrounding bone tissue; The outer wall of the prosthesis body (1) is provided with a plurality of barbs (120), and the direction of the barbs is consistent with the direction in which the prosthesis body (1) is implanted into the cancellous bone.

2. The bone filling prosthesis for treating local bone defects of the knee joint according to claim 1, characterized in that: The pores (110) are configured as honeycomb holes.

3. The bone filling prosthesis for treating local bone defects of the knee joint according to claim 1, characterized in that: The frustum column is a conical column, and the diameters of its two end faces are not equal.

4. The bone filling prosthesis for treating local bone defects of the knee joint according to claim 1, characterized in that: The prosthesis body (1) is configured as a tantalum metal part.

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