Bionic acetabular prosthesis

Abstract

The invention relates to a bionic acetabular prosthesis. The bionic acetabular prosthesis comprises an acetabular cup (1) and a liner (2), and is characterized in that a clamping groove (4) is arranged in the inner surface of the rim of the acetabular cup (1), a spring clamping ring (3) is increased in the clamping groove (4), the liner (2) is placed in the acetabular cup (1), and the rim of the liner (2) pushes against the lower surface of the spring clamping ring (3); and the acetabular cup (1) is made of a hierarchical porous material. The bionic acetabular prosthesis is stable in structural connection and convenient to mount, and has relatively high biocompatibility.

Description

Technical field [0001] The invention relates to a medical device, in particular to a bionic acetabular prosthesis. Background technique [0002] Artificial hip replacement is the most effective medical method for reconstructing the function of the damaged hip joint in clinic, and it has been widely used in clinical practice. Traditional acetabular prostheses include components such as acetabular cups and inner linings, but their acetabular cups and inner linings are often installed directly without position fixation, so they may loosen or become loose during use. The displacement affects the stability of the product. In addition, as an external implant, there is a lack of material exchange between the implanted prosthesis and the human tissue, poor biocompatibility, easy to suffer rejection, poor postoperative healing effect, and weak connection stability, easy to loosen Common defects such as, rotation and shedding. [0003] Porous materials have the characteristics of low rela...

AI Technical Summary

Problems solved by technology

However, the hierarchical porous materials currently used in artificial joint replacement are very limited

This may be mainly due to the fact that the existing porous materials themselves cannot have both high porosity and structural mechanical strength. Therefore, their porosity is generally low, their own weight is heavy, and their penetration is poor, which is not conducive to the high efficiency of substances in human tissues. Exchange, poor biocompatibility, poor postoperative healing effect; human tissue cannot fill the inside of the structure, and the cell stress barrier cannot be eliminated, etc.

[0004] In addition, the application of bionic artificial bone requires uniform material itself, such as pore size and pore distribution, so that the performance is uniform, but in fact, there are many multi-level porous materials that cannot meet this requirement; although some claim to have reached high Uniformity, but its uniformity is still the uniformity at the large volume scale. If you use a small volume scale to measure and compare, for example, take multiple three-dimensional bodies of the same size and the volume is not larger than one cubic centimeter on the material, and measure their masses respectively. , the difference in the degree of inhomogeneity is still very large, so the various properties of the hierarchical porous material are not uniform, such as the uneven distribution of pore size and voids, which leads to the uneven distribution of mechanical strength, elastic modulus, etc., resulting in defects such as hidden quality , which seriously affects its function

For example, CN201210185031 discloses a preparation method of a bionic artificial bone with a multi-level (micron / nanometer) pore structure, but the three-dimensional multi-level pore structure obtained by this method still cannot meet the requirements due to the randomness and irregularity of the pore structure. Functional requirements of bionic artificial bone

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