Novel acetabulum assembly, and preparation method and application thereof

Abstract

The invention discloses a novel acetabulum assembly and a preparation method and application thereof. The acetabulum assembly comprises a ceramic acetabubum and a metal acetabular cup, wherein the ceramic acetabubum and the metal acetabular cup are tightly bonded together through a sealing layer. The sealing layer comprises a metal sealing layer prepared from a metal or an alloy thereof through a direct sealing process, or through a metal pressure sealing process or through ceramic surface modification at first and solder welding next; or the sealing layer comprises an oxide sealing layer mainly prepared from a metal oxide and / or a non-metal oxide through welding. The method comprises the step of forming the sealing layer between the ceramic acetabubum and the metal acetabular cup by at least adopting a sealing or welding process so as to allow the ceramic acetabubum and the metal acetabular cup to be tightly bonded together. The novel acetabulum assembly provided by the invention has the characteristics of high bonding strength, good biocompatibility, stable physical and chemical performance, etc.; the preparation method is easy and can overcome the risk of easy breaking of a thin-walled ceramic acetabulum due to a large bulb in a conventional ceramic whole hip joint and enlarge the application scope of the large bulb.

Description

technical field [0001] The invention relates to an artificial joint, in particular to a novel assembly of a ceramic acetabular and a metal titanium acetabular cup formed by a sealing technique, which can be applied to a ceramic surface total hip joint and belongs to the technical field of biomedical materials. Background technique [0002] The use of ceramic-on-ceramic (CoC) interface combinations in total hip replacements began in France and Germany in the early 1970s. The earliest ceramic acetabular prosthesis was a single structure, which was placed and fixed by bone cement or press-fitting during surgery. However, clinical practice has proved that its fixation is not firm enough, and the main cause of failure is aseptic loosening. Since the early 1990s, there has been an important change in the design of CoC prostheses, that is, most acetabular prostheses use a titanium outer cup with a rough or porous outer surface and a ceramic inner cup. combination form. The resul...

AI Technical Summary

Problems solved by technology

However, with the development of large ball heads, the requirements for ceramic acetabulums are getting higher and higher. Although the strength of ceramics continues to increase, the toughness is also increasing. Due to the brittleness of ceramics, as the diameter of the ball head increases, the ceramic acetabular The thickness is getting smaller and smaller, and the risk of crushing is also increasing. At the same time, the processing accuracy of the large ball head is very high for the ceramic acetabular, so as to ensure that it is closely interlocked with the titanium acetabular cup, thereby enhancing the reliability of the ceramic acetabular. , its processing is inconvenient, the cost is high, and it is difficult to popularize and apply