Knee joint center type cushion block

Abstract

The utility model relates to the technical field of medical instruments, in particular to a knee joint center type cushion block which comprises a knee joint center type cushion block body, a prosthesis connecting opening is formed in the bottom of the knee joint center type cushion block body, and an extension rod connecting hole is formed in the top of the knee joint center type cushion block body. And a solid biological fixing part is arranged between the prosthesis connecting port and the extension rod connecting hole. The cushion block provided by the utility model is short in operation time, good in supporting performance, capable of preventing collapse of a repaired bone defect part, capable of realizing close fit with a knee joint femoral condyle prosthesis or a knee joint tibia prosthesis, and capable of realizing biological fixation and filling of the bone defect part.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical equipment technical field especially, it relates to a knee joint center type pad. BACKGROUND

[0002] At present, with the popularization of knee joint replacement operation, the number of artificial knee joint replacement population is rising. Followed by the total amount of joint revision surgery increases, the process of revision surgery often causes bone loss.

[0003] In the knee joint revision reconstruction, the reconstruction of bone loss becomes the key of the operation to establish the stable prosthesis load area. Various pads have been widely used in revision filling treatment, and the existing bone filling pad is mostly non-biological fixed type, which is filled with bone marrow mud or filled with smaller pad to the position of bone defect part and then filled with bone cement. The pad of this form is used for a long time in operation, is more laborious, and the force transmission is not good, is easy to loosen, and cannot achieve good operation effect. SUMMARY

[0004] The utility model solves the technical problem to provide a knee joint center type pad, and the operation time is short, the supporting property is good, can prevent the collapse after the repair of bone defect part, can realize the close cooperation with knee joint femoral condyle prosthesis or knee joint tibial prosthesis, and can realize the biological fixed filling of bone defect part.

[0005] The utility model is realized by the following scheme:

[0006] A knee joint center type pad, which comprises a knee joint center type pad main body, a prosthesis connecting port is arranged at the bottom of the knee joint center type pad main body, an extension rod connecting hole is arranged at the top of the knee joint center type pad main body, and a solid biological fixed part is arranged between the prosthesis connecting port and the extension rod connecting hole.

[0007] Further, the shape of the knee joint center type pad main body is a truncated cone structure with a large diameter at the bottom and a small diameter at the top.

[0008] Further, the prosthesis connecting port is a male connecting port with a tapered plug arranged at the middle.

[0009] Further, the extension rod connecting hole is a tapered surface connecting hole.

[0010] Further, the outer side surface of the biological fixed part is a porous bone trabecula structure.

[0011] Further, the knee joint center type pad main body is a femur center pad or a tibia center pad.

[0012] Preferably, the knee joint center type pad main body is made of 3D printing.

[0013] Beneficial effects of the utility model:

[0014] This utility model provides a knee joint center-type pad, the bottom of the knee joint center-type pad body is provided with a prosthesis connection port, and the top of the knee joint center-type pad body is provided with an extension rod connection hole, which can make it fit tightly with the prosthesis and the extension rod, and the operation is convenient and the time is short.

[0015] Furthermore, since the central pad of the knee joint is a single structure and a solid biological fixation part is provided between the prosthesis connection port and the extension rod connection hole, it has good support and can prevent collapse after the bone defect is repaired. In addition, the outer surface of the part where the prosthesis connection port and the extension rod connection hole are not connected is a porous trabecular bone structure, which can not only ensure the support strength of the overall structure, but also achieve biological fixation and filling of the bone defect. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the main structure of this utility model.

[0017] Figure 2 This is a schematic diagram of the structure of this utility model viewed from below.

[0018] Figure 3 This is a cross-sectional structural diagram of the present invention.

[0019] Figure 4 This is a schematic diagram of the assembly structure of this utility model.

[0020] In the diagram: 1. Knee joint center pad; 11. Knee joint center pad body; 12. Extension rod connection hole; 13. Prosthesis connection port; 14. Biological fixation part; 2. Prosthesis. Detailed Implementation

[0021] A knee joint center pad 1, the structural schematic diagram of which is shown below. Figures 1 to 3 As shown, its assembly structure with the prosthesis is illustrated in the diagram below. Figure 4 As shown, it includes a knee joint center-shaped pad body 11, a prosthesis connection port 13 at the bottom of the knee joint center-shaped pad body, an extension rod connection hole 12 at the top of the knee joint center-shaped pad body, and a solid biological fixation part 14 between the prosthesis connection port and the extension rod connection hole.

[0022] The knee joint center-type pad provided by this utility model has a prosthesis connection port at the bottom of the main body that inserts into the conical hole of the tibial plateau or femoral condyle, achieving a good fit with the tibial plateau or femoral condyle. An extension rod is inserted into the extension rod connection hole at the top of the main body of the knee joint center-type pad, achieving a good fit between the knee joint center-type pad and the extension rod. Furthermore, the main body of the knee joint center-type pad is a single, integral structure, making connection with the prosthesis 2 and the extension rod (not shown) convenient and quick, resulting in a shorter surgical time.

[0023] Since the solid biological fixation part is arranged between the prosthesis connecting port and the extension rod connecting hole, the support is good and collapse after repair of the bone defect part can be prevented, the overall strength is improved, and filling of the bone cement is not needed, biological fixation filling of the bone defect part is realized, and bone cement penetration affecting bone growth is effectively prevented.

[0024] Further, the knee joint central type pad block body is a truncated cone structure with a large diameter at the bottom and a small diameter at the top, can form an anatomical feature central type pad block, is more in line with the human bone structure in structure, and can reduce pain of soft tissues after being implanted into the human body by using a rounded corner transition of the whole edge, the truncated cone structure is in line with the morphology of the knee joint dry dirt end bone defect area, can realize filling of the defect area, and can effectively prevent re-sinking of the knee joint central type pad block and increase the overall stability.

[0025] Further, the prosthesis connecting port is a male connecting port with a tapered plug at the middle, is convenient and fast to be inserted into the tapered hole of the tibial plateau or femoral condyle, and realizes close cooperation of the knee joint central type pad block and the prosthesis.

[0026] Further, the extension rod connecting hole is a tapered surface connecting hole, is convenient for inserting the extension rod inserted into the medullary cavity of the bone stem into the tapered surface connecting hole, and realizes close cooperation of the knee joint central type pad block and the extension rod.

[0027] Further, the outer side surface of the biological fixation part is a porous trabecular structure, is convenient for realizing biological fixation of the knee joint central type pad block, and has better effect.

[0028] Further, the knee joint central type pad block body is a femoral central pad block or a tibial central pad block, the knee joint central type pad block can be more suitable for the femoral condyle and can be suitable for the tibial plateau, and the adaptability of the knee joint central type pad block is improved.

[0029] Preferably, the knee joint central type pad block body is made by 3D printing, is convenient and fast to make and has low cost.

[0030] In summary, the knee joint central type pad block has short operation time, good support, can realize close cooperation with the prosthesis, and can realize biological fixation filling of the bone defect part.

[0031] The above only describes preferred embodiments of the utility model and is not used for limiting the utility model, for those skilled in the art, the utility model can have various changes and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A knee center type spacer, characterized by: The knee center type pad block body is provided with a prosthesis connecting port at the bottom, the prosthesis connecting port is a male connecting port provided with a taper plug at the middle, the knee center type pad block body is provided with an extension rod connecting hole at the top, and a solid biological fixation part is arranged between the prosthesis connecting port and the extension rod connecting hole.

2. The central type knee pad of claim 1, wherein: The knee center type pad block body is in a conical frustum structure with a large diameter at the bottom and a small diameter at the top.

3. The central type knee pad of claim 1, wherein: The extension rod connecting hole is a taper surface connecting hole.

4. The knee central type spacer according to claim 1, wherein: The outer side surface of the biological fixation part is a porous trabecular structure.

5. The knee central type spacer according to claim 1, wherein: The knee center type pad block body is a femur center pad block or a tibia center pad block.

6. The central type knee pad of claim 1, wherein: The knee center type pad block body is made by 3D printing.

Images