Biological type hip joint

Abstract

The invention relates to a biological type hip joint. The hip joint comprises a femoral stem (1) and a femoral neck (2). The hip joint is characterized in that the lower part of the femoral neck (2) is provided with a barb (4), the upper part of the femoral stem (1) is provided with an L-shaped hole (7), and an installing hole (8) communicated with a longitudinal hole in the L-shaped hole (7). The lower part of the femoral neck (2) is inserted into the L-shaped hole (7). The barb (4) is hooked and clamped in a horizontal hole in the L-shaped hole (7). The installing hole (8) is internally provided with a spring (3). One end of the spring (3) is abutted against the lower part of the femoral neck (2), and the outer side of the other end is provided with a screw rod (9) which is connected in the installing hole (8). The femoral stem (1) is provided with a filling interlayer (10) which passes through two sides of a stem body, and a hole (11) passing through the stem body and communicated with the filling interlayer (10). The filling interlayer (10) is made of a hierarchical porous material. The hip joint has relatively high connection stability and biocompatibility, and post-surgery healing effect is better.

Description

Technical field [0001] The invention relates to human joint replacement, in particular to a biological hip joint. Background technique [0002] At present, most artificial hip replacement prostheses are designed in one piece. If a certain part is broken, such as a broken neck, it will lead to failure of its overall structure and function, which undoubtedly causes a huge waste. It also lacks the buffer function, the load is relatively large, the stress is relatively poor, and the service life is short. In addition, existing artificial replacement prostheses generally have poor connection stability with human biological tissues, easy to loosen, rotate and fall off; poor biocompatibility, easy to suffer rejection after implantation, and poor postoperative healing effect Good and other common problems. These problems cannot be realized at the same time by relying solely on optimized structural design. [0003] Porous materials have the characteristics of low relative density, high s...

AI Technical Summary

Problems solved by technology

However, there are very limited reports on the use of hierarchical porous materials in artificial joint replacement prostheses.

This may be mainly due to the fact that the existing porous materials themselves have a significant decrease in structural mechanical strength with the increase in porosity, so the porosity is generally low, the weight is heavy, and the permeability is low, which is not conducive to the removal of substances in human tissues. High-efficiency exchange, poor biocompatibility, poor postoperative healing, 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 under the large volume scale. If it is measured and compared with the small volume scale, for example, a plurality of three-dimensional bodies whose volume is not larger than one cubic centimeter are randomly selected on the material, and their masses are measured respectively. The difference in uniformity 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, resulting in uneven distribution of mechanical strength, elastic modulus, etc., resulting in defects such as hidden quality, which seriously affect 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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