双动全髋关节置换髋臼杯的长期磨损：取出研究
Long-term wear of dual mobility total hip replacement cups: explant study.
作者信息
Boyer Bertrand, Neri Thomas, Geringer Jean, Di Iorio Alexandre, Philippot Remi, Farizon Frederic
机构信息
Mines de Saint-Etienne, Unité SAINBIOSE, INSERM U1059, Université de Lyon-St Etienne, Lyon, France.
Laboratoire de Physiologie de l'Exercice, Centre d'Orthopédie Traumatologie CHU St Etienne, Université Jean Monnet, 42055, St Etienne Cedex 2, France.
出版信息
Int Orthop. 2018 Jan;42(1):41-47. doi: 10.1007/s00264-017-3525-z. Epub 2017 Jun 3.
PURPOSE
Dual mobility THA implantations are increasing. THA survival of more than 15 years is considered long-term survival based on the Charnley prosthesis, which has a median wear rate of 39 to 98 mm/year. What is the median wear rate of dual mobility THA cups and its repartition on the liner volume? What are the factors influencing dual mobility wear?
METHODS
Thirty-five explants were analysed. The liners were entirely mapped with a fully automatic stripe light scanner that uses green LED light.
RESULTS
The liners had a median wear rate of 38 mm/year. The distribution of the wear between the two bearings varied greatly. No factor was found influencing wear volumes.
CONCLUSIONS
The median annual wear of dual mobility liners is at least as low as the wear of cemented polyethylene liners and lower than equivalent cementless liners. The two articulations of the dual mobility THA do not cause more wear.
LEVEL OF EVIDENCE
Level IV - case series.
目的
双动全髋关节置换术（THA）的植入数量在不断增加。基于Charnley假体，超过15年的THA存活被视为长期存活，其平均磨损率为每年39至98毫米。双动THA髋臼杯的平均磨损率是多少，以及其在衬垫体积上的分布情况如何？影响双动磨损的因素有哪些？
方法
分析了35个翻修假体。使用绿色发光二极管（LED）光的全自动条纹光扫描仪对衬垫进行了完整测绘。
结果
衬垫的平均磨损率为每年38毫米。两个轴承之间的磨损分布差异很大。未发现影响磨损量的因素。
结论
双动衬垫的年平均磨损至少与骨水泥聚乙烯衬垫的磨损一样低，且低于同等的非骨水泥衬垫。双动THA的两个关节不会导致更多磨损。
证据水平
IV级——病例系列。
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