氧化锆陶瓷低温老化研究进展

氧化锆陶瓷具有优异的力学性能、化学稳定性和白色美学特性,已广泛用于与牙齿相关的修复体中,如牙冠、牙桥、基台以及最近的种植体。然而,氧化锆陶瓷的生物安全性受到低温老化(LTD)的威胁。LTD现象发生在低温潮湿环境中,例如在人体环境中,氧化锆陶瓷的强度在短期内迅速降低,进而导致早期失效。本文从表征方法、影响因素以及老化理论模型等角度,对近年来各国学者对氧化锆陶瓷LTD现象开展的相研究进行了综述,并对相关研究结果进行梳理了及归纳。

Research Progress on Low-Temperature Degradation of Zirconia Ceramics

Combined with the excellent mechanical properties, chemical stability and white aesthetics, zirconia ceramics have been widely used in the teeth-related restorations in dentistry, such as crowns, bridges, abutments and more recently implants. However, the biosafety of zirconia ceramics has been jeopardized by the low-temperature degradation (LTD). LTD phenomenon occurs at low temperatures and humid environments, e.g. in human bodies,the strength of zirconia ceramics decreases rapidly in the short term, which leads to early failure. In this paper, the research on LTD phenomenon of zirconia ceramics by scholars from various countries in recent years was reviewed from the perspectives of characterization methods, influencing factors and degradation theoretical models, and the related research results were sorted out and summarized.