Adravanti Paolo, Vasta Sebastiano
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Acta Biomed. 2017 Jun 7;88(2S):112-117. doi: 10.23750/abm.v88i2-S.6521.
Total knee arthroplasty is a successful operation that significantly improves patient's quality of life. However, studies demonstrated as only 82% to 89% of patients are satisfied with their surgery, being the other disappointed with regard to their expectations. Two to 5.7% of total knee arthroplasties (TKAs) require revision within 5 years. Both complex primary cases and revision TKA often necessitate for a higher degree of constrain than cruciate retaining or postero-stabilized implant design. In the 1970s varus-valgus constrained (VVC) or semi-constrained implants have been developed by Insall and associates from the PS design, which provide varus-valgus stability preserving a fair amount of host bone. VVC TKAs allows for a small amount of movement in the coronal, antero-posterior and axial planes. In this paper, the authors give an overview of the indications, outcomes and technique for varus-valgus constrained implants, both in the setting of primary and revision knee arthroplasty.
全膝关节置换术是一种成功的手术，能显著提高患者的生活质量。然而，研究表明只有82%至89%的患者对手术满意，其他患者对手术效果感到失望。2%至5.7%的全膝关节置换术（TKA）在5年内需要翻修。复杂的初次病例和翻修TKA通常需要比保留交叉韧带或后稳定型植入物设计更高程度的限制。20世纪70年代，因萨尔及其同事在PS设计的基础上开发了内翻-外翻受限（VVC）或半受限植入物，这种植入物能在保留相当数量宿主骨的情况下提供内翻-外翻稳定性。VVC TKA允许在冠状面、前后平面和轴平面有少量运动。在本文中，作者概述了内翻-外翻受限植入物在初次和翻修膝关节置换术中的适应症、手术效果和技术。
