Cushion block for rebuilding and reconstructing acetabular bone and fixing structure of cushion block and acetabular cup prosthesis

A fixed structure and acetabular cup technology, applied in the field of medical devices, can solve the problems of inability to reconstruct and fix acetabular side defects, poor adaptability, single type, etc., to achieve good reconstruction and fixation, increase chimeric force, and increase stability Effect

Pending Publication Date: 2021-12-31
长沙市第三医院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In order to solve the problem that the pads on the market are of one-piece structure, single type, thick pads, unable to reconstruct and fix acetabular side defects of various shapes, and have poor adaptability, this application provides a method for acetabular bone revision and reconstruction. The spacer and its fixing structure with the acetabular cup prosthesis

Method used

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  • Cushion block for rebuilding and reconstructing acetabular bone and fixing structure of cushion block and acetabular cup prosthesis
  • Cushion block for rebuilding and reconstructing acetabular bone and fixing structure of cushion block and acetabular cup prosthesis
  • Cushion block for rebuilding and reconstructing acetabular bone and fixing structure of cushion block and acetabular cup prosthesis

Examples

Experimental program
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Effect test

Embodiment 1

[0039] refer to figure 1 , a spacer for acetabular bone revision and reconstruction, the spacer is located between the acetabular cup prosthesis and the acetabular bone, and is fixedly connected with the acetabular cup prosthesis and the acetabular bone respectively, and the spacer includes a first part 1. The second part 2 is clamped on the first part 1. The first part 1 and the second part 2 are in the shape of 1 / 8 sphere. The radius and shape of the first part 1 and the radius and shape of the second part 2 are the same. Similarly, the thicknesses of the first part 1 and the second part 2 are both thin at the edges and gradually thicken toward the center of the ball. The edges of the first part 1 and the second part 2 extend into the acetabular bone. The shape of the first part 1 and the second part 2 is a 1 / 4 spherical shape, and the shape and thickness of the snapped first part 1 and the second part 2 are adapted to the defect of the acetabular bone.

[0040] refer to ...

Embodiment 2

[0047] Embodiment 2 is an improvement on the basis of Embodiment 1.

[0048] refer to Figure 4 , the first part 1 and the second part 2 are in the shape of 1 / 4 sphere, the radius and shape of the first part 1 are the same as those of the second part 2, and the thicknesses of the first part 1 and the second part 2 are the same Its edge is thin and gradually thickens toward the center of the sphere. The first part 1 and the second part 2 after snapping are hemispherical in shape. The shape and thickness of the first part 1 and the second part 2 after snapping are consistent with Compatible with the defect of acetabular bone.

[0049] refer to Figure 5 with Image 6 A dovetail block 4 is provided on the side wall of the first part 1 close to the second part 2, and a dovetail groove 3 is provided on the side wall of the second part 2 close to the first part 1, and the dovetail block 4 and the dovetail groove 3 are engaged with each other. The first part 1 is connected to the...

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Abstract

The invention relates to the field of medical instruments, in particular to a cushion block for rebuilding and reconstructing an acetabular bone and a fixing structure of the cushion block and an acetabular cup prosthesis. The cushion block is located between the acetabular cup prosthesis and the acetabular bone and connected with the acetabular cup prosthesis and the acetabular bone; the cushion block comprises a first component and a second component which is the same as or different from the first component in radius and shape, the first component is movably connected with the second component, and the shape of the first component and the shape of the second component are matched with the defect position of the acetabular bone after the first component and the second component are connected. The first part and the second part which are the same or different in radius and shape are movably connected, the shape formed by combining the first part and the second part is matched with the shape of the defect position of the acetabular bone, and therefore the defect position of the acetabular bone can be better repaired, the first part and the second part are suitable for acetabular bone defects of different shapes, and the acetabular bone defect repairing effect is better. The acetabular bone is better reconstructed and fixed, subsequent fixation of the acetabular cup prosthesis is facilitated, and the effect of operation flexibility is improved through the split structure of the cushion block.

Description

technical field [0001] The present application relates to the field of medical devices, in particular to a spacer for acetabular bone revision and reconstruction and its fixing structure with the acetabular cup prosthesis. Background technique [0002] The current methods for reconstructing acetabular bone defect include compression bone graft, structural bone graft, jumbo cup, reinforcement ring, cup-cage, 3D printing personalized acetabular cup prosthesis, etc. Good initial stability cannot be obtained, and prosthetic loosening and bone resorption are prone to occur. Kostensalo et al. reported 60 cases of hip joint revision using compression bone grafting combined with cement cups. The average follow-up was 7 years, and the average survival rate was 73% based on re-revision. Among them, 13 cases were aseptic loosening, accounting for 81%. [0003] It has been reported in the literature that whether it is autologous or allogeneic large structural bone grafts, in the proces...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F2/34A61F2/30
CPCA61F2/34A61F2/30771A61F2002/30329A61F2002/30784A61F2002/348A61F2002/30736A61F2002/30387A61F2002/3092A61F2002/3093A61F2002/30011A61F2002/30777A61F2002/30324A61F2002/30322A61F2/30734A61F2002/3069A61F2002/30795A61F2/30965A61F2220/0025A61F2310/00952
Inventor 雷青
Owner 长沙市第三医院
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