Department of Orthopaedics, University of Miami, Miami, Florida, USA.
J Arthroplasty. 2011 Dec;26(8):1165-9. doi: 10.1016/j.arth.2011.01.009. Epub 2011 Mar 16.
A prospective randomized study was conducted to determine if a design change in the articular surface geometry introduced in the Optetrak total knee to increase prosthetic joint conformity and further reduce polyethylene stress had any impact on implant survival, particularly when the all-polyethylene version of the implant was used. Forty-seven patients undergoing bilateral simultaneous total knee arthroplasties were randomized for the side, receiving an all-polyethylene tibial component and followed up for a mean 11.6 years. Survival rates for the all-polyethylene and metal-backed modular versions of the implant were both 98%, excluding a single case of deep infection. Survival rates with revision for aseptic loosening as an end point were 100%. The increase in tibial and femoral radii in the coronal plane of the Optetrak posterior stabilized knee did not result in a reduced implant survival rate in either the metal-backed modular or all-polyethylene versions of the implant.
一项前瞻性随机研究旨在确定 Optetrak 全膝关节中引入的关节表面几何形状设计改变是否会影响假体关节的一致性，从而进一步降低聚乙烯的应力，特别是在使用全聚乙烯植入物版本时。对 47 例双侧同期全膝关节置换患者进行随机分组，一侧使用全聚乙烯胫骨组件，平均随访 11.6 年。全聚乙烯和金属背衬模块式植入物的生存率均为 98%，排除了 1 例深部感染病例。以无菌性松动为终点的翻修生存率为 100%。Optetrak 后稳定膝关节冠状面胫骨和股骨半径的增加并未导致金属背衬模块式或全聚乙烯植入物版本的植入物生存率降低。
