Guyen Olivier, Pibarot Vincent, Vaz Gualter, Chevillotte Christophe, Carret Jean-Paul, Bejui-Hugues Jacques
Department of Orthopedic Surgery, Pavillon T, Hôpital Edouard Herriot, Lyon, France.
J Arthroplasty. 2007 Sep;22(6):849-58. doi: 10.1016/j.arth.2006.11.014. Epub 2007 Jul 25.
We performed a retrospective study on 167 primary total hip arthroplasty (THA) procedures in 163 patients at high risk for instability to assess the reliability of unconstrained tripolar implants (press-fit outer metal shell articulating a bipolar polyethylene component) in preventing dislocations. Eighty-four percent of the patients had at least 2 risk factors for dislocation. The mean follow-up length was 40.2 months. No dislocation was observed. Harris hip scores improved significantly. Six hips were revised, and no aseptic loosening of the cup was observed. The tripolar implant was extremely successful in achieving stability. However, because of the current lack of data documenting polyethylene wear at additional bearing, the routine use of tripolar implants in primary THA is discouraged and should be considered at the present time only for selected patients at high risk for dislocation and with limited activities.
我们对163例存在高脱位风险患者的167例初次全髋关节置换术（THA）进行了一项回顾性研究，以评估非限制性三极植入物（压配式金属外杯与双极聚乙烯组件相连接）预防脱位的可靠性。84%的患者至少有2个脱位风险因素。平均随访时间为40.2个月。未观察到脱位情况。Harris髋关节评分显著改善。6例髋关节进行了翻修，未观察到髋臼杯无菌性松动。三极植入物在实现稳定性方面极为成功。然而，由于目前缺乏关于额外承重面聚乙烯磨损的数据，不建议在初次THA中常规使用三极植入物，目前仅应考虑用于选定的高脱位风险且活动受限的患者。
