Fracture of the polyethylene tibial post in a NexGen posterior-stabilized knee prosthesis
Fracture of the polyethylene tibial post in a NexGen posterior-stabilized knee prosthesis
复制标题
DOI：
10.1016/j.arth.2004.04.013
复制
发表时间：
2004-12-01
影响因子：
3.5
通讯作者：
Chen, TH
中科院分区：
文献类型：
--
作者：
Chiu, YS;Chen, WM;Chen, TH
我们报道了一例44岁女性在接受3年NexGen后稳定全膝关节置换术后聚乙烯胫骨柱骨折的病例（Zimmer, Warsaw, in）。抛光和分层聚乙烯被发现周围的破坏地点的岗位，特别是在前方面的岗位基地。提示其失效机制可能是金属股骨凸轮与聚乙烯胫骨桩之间的反复前撞击。更换断裂的内嵌物后，患者先前的症状得到完全缓解。据我们所知，这是第一例关于NexGen后稳定膝关节假体断裂的报道。
We reported a case of fracture of a polyethylene tibial post in a 44-year-old woman after 3 years of NexGen posterior-stabilized total knee arthroplasty (Zimmer, Warsaw, IN). Burnishing and delamination of the polyethylene was found around the breakage site of the post, especially over the anterior aspect of the post base. It indicated that the possible failure mechanism was the repeated anterior impingement between the metal femoral cam and polyethylene tibial post. After replacement of the broken insert, the patient obtained complete relief of previous symptoms. To our knowledge, this is the first report of post breakage of a NexGen posterior-stabilized knee prosthesis.