Maccauro G, Piconi C, Burger W, Pilloni L, De Santis E, Muratori F, Learmonth I D
Department of Orthopaedics, The Catholic University, Rome, Italy.
J Bone Joint Surg Br. 2004 Nov;86(8):1192-6. doi: 10.1302/0301-620x.86b8.15012.
We studied factors contributing to the initiation of fracture and failure of a zirconia ceramic femoral head. The materials retrieved during a revision total hip replacement were submitted to either visual, stereomicroscopic and scanning electron microscopy (SEM) or SEM and energy-dispersive X-ray analysis. X-ray diffraction was performed in order to investigate the extent of tetragonal to monoclinic phase transition. Histological examination was performed on the periprosthetic tissues. The results showed that failure was due to the propagation during clinical use of defects which may have been introduced into the material during the processing of the ceramic, rather than those intrinsic to zirconia. The literature relating to previous failures of zirconia components is reviewed.
我们研究了导致氧化锆陶瓷股骨头骨折和失效的因素。在翻修全髋关节置换术中取出的材料，分别进行了肉眼、体视显微镜和扫描电子显微镜（SEM）检查，或SEM和能量色散X射线分析。进行X射线衍射以研究四方相向单斜相转变的程度。对假体周围组织进行了组织学检查。结果表明，失效是由于临床使用过程中陶瓷加工时可能引入材料中的缺陷扩展所致，而非氧化锆本身固有的缺陷。本文回顾了与氧化锆部件先前失效相关的文献。
