All-ceramic artificial hip-joint prosthesis and preparation method thereof

Abstract

The invention discloses an all-ceramic artificial hip-joint prosthesis and a preparation method thereof. The artificial hip-joint prosthesis includes a ceramic acetabulum and a ceramic femur. The outer surface of the ceramic acetabulum is hemispherical and is provided with mutually intersected annular grooves and longitudinal grooves; the inner surface of the ceramic acetabulum is in a ball-like shape; the ceramic femur comprises a femoral stem and a femoral head which are connected; the femoral head is attached to the ball-shaped inner surface of the ceramic acetabulum, and connects the ceramic femur with the ceramic acetabulum. Ceramic serves as the preparation material of the prosthesis, and the prosthesis has good abrasion resistance. Besides, the surface of the prosthesis is provided with the grooves, and therefore when the prosthesis is installed, people do not need to use bone cement for fixation and do not need the biological surface for bones to grow into. Stability is achieved through press fit of the prosthesis and bone tissue.

Description

technical field [0001] The invention relates to an artificial joint in the medical field, in particular to an all-ceramic artificial hip joint prosthesis and a preparation method thereof. Background technique [0002] Artificial joint replacement is considered to be an effective way to treat common orthopedic diseases such as severe joint trauma, osteonecrosis, tumors around the joints, and various end-stage arthritis. According to preliminary statistics, there are more than 1.5 million joint replacement operations in the world every year, and with the acceleration of population aging, this number is still rising. With the continuous improvement of surgical techniques and the gradual improvement of joint prosthesis design, most patients after joint replacement can obtain relatively satisfactory results, but periprosthetic osteolysis and prosthetic loosening induced by prosthetic wear and wear particles release It is still the main reason that affects the long-term use of ar...

AI Technical Summary

Problems solved by technology

Although this design realizes the ceramic-to-ceramic friction interface, there is still interface friction between metal and ceramic, and the risk of ceramic and metal wear still exists

In addition, the elastic modulus of metal and ceramics is quite different, the stress distribution is uneven, and the phenomenon of stress concentration and cracking of ceramics is prone to occur.

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