The purpose of this study was to investigate the effects of the undersurface roughness of total knee prosthesis on clinical outcomes. We compared the clinical and radiological outcomes and prosthesis survivals in patients who underwent total knee arthroplasty using prosthesis with identical designs but different surface roughness (average surface roughnesses (R_a), 5.0 μm vs. 11.6 μm). The results showed that the knee prostheses with a more roughened undersurface (R_a = 11.6 μm) produced significantly better functional results and enhanced prosthesis survival. The difference in surface roughness was associated with incidence of osteolysis and loosening at the tibial baseplate, but not at the femoral component. Overall, our results provided significant evidence that the use of roughened undersurface of tibial baseplate would be a way to prevent aseptic loosening.

中文翻译：

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相同设计的不同表面粗糙度的全膝关节假体的临床结果比较

这项研究的目的是调查全膝关节假体的表面粗糙度对临床结果的影响。我们比较了采用相同设计但表面粗糙度不同的假体进行全膝关节置换术的患者的临床和放射学结果以及假体存活率（平均表面粗糙度（R _a），5.0μm对11.6μm）。结果表明，膝关节假体的表面更粗糙（R _a= 11.6μm）产生了明显更好的功能结果并提高了假体生存率。表面粗糙度的差异与胫骨基板处骨溶解和松动的发生有关，而与股骨组件无关。总体而言，我们的结果提供了重要的证据，证明使用粗糙的胫骨底板下表面将是防止无菌性松动的一种方法。