Laskin R S
Hospital for Special Surgery, New York, NY 10021.
Clin Orthop Relat Res. 1993 Mar(288):270-6.
A seven-year postoperative evaluation of 54 patients with either osteoarthrosis or rheumatoid arthritis was conducted. Uncemented, posterior cruciate-retaining, pegged tibial implants produced clinical and roentgenographic results comparable to those seen with standard cemented total knee arthroplasty (TKA). Subsidence, however, seemed to be slightly increased in the uncemented group especially if there was incomplete coverage of the tibial plateau surface. The mere presence of subsidence was not correlated with any increase in pain, although the four implant failures in which the patients had painful loose prostheses all had some subsidence. The cumulative survival rate at seven years was 92.3%, with four arthroplasty failures. Roentgenographic appearance of condensation about the pegs was not statistically correlated with the presence or absence of pain or subsidence. The roentgenographic appearance of opacification in the declivities of the undersurface of the component, however, was associated with a statistically significant decrease in the incidence of subsidence.
对54例骨关节炎或类风湿性关节炎患者进行了术后七年的评估。非骨水泥型、保留后交叉韧带、带桩胫骨假体产生的临床和影像学结果与标准骨水泥型全膝关节置换术（TKA）相当。然而，非骨水泥组的下沉似乎略有增加，特别是在胫骨平台表面覆盖不完全的情况下。单纯的下沉与疼痛增加无关，尽管在4例植入物失败病例中，患者有疼痛性假体松动，均有一定程度的下沉。七年的累积生存率为92.3%，有4例关节置换失败。桩周围的骨密度影在影像学上的表现与疼痛或下沉的有无无统计学相关性。然而，假体下表面凹陷处的不透光影像学表现与下沉发生率的显著降低相关。
