Saxler G, Temmen D, Bontemps G
Klinik und Poliklinik für Orthopädie, Universität Duisburg-Essen.
Orthopade. 2004 Nov;33(11):1267-76. doi: 10.1007/s00132-004-0727-z.
Since its introduction in the 1970s, unicompartmental knee arthroplasty (UKA) has become a standardized routine technique. Increasing experience in determining the indication for UKA and improvements in design and materials of the prosthesis have led to better results. The AMC UKA has an unconstrained mobile bearing with congruent area contact from 0 degrees to 30 degrees of flexion. The principle is that a polyethylene mobile bearing, concavely spherical above and flat below, can maintain perfect congruity between the spherical metal femoral condyle and the flat metal tibial plateau. This ensures complete freedom to rotate and slide upon one other with physiologic kinematic and low intrinsic stability. The low contact stress results in reduced polyethylene wear. The 361 AMC UKA replacements of the current study showed safe anchorage of the prosthesis and good durability of the mobile bearings. The clinical results of the investigated patients demonstrate that the AMC UKA is a successful concept. The comparison of 30 minimally invasive UKA with 30 conventional UKA and 30 total knee replacements shows an advantage of the minimally invasive technique with regard to reduced rehabilitation time. The accuracy of implantation was comparable between the conventional and the minimally invasive techniques.
自20世纪70年代首次引入以来，单髁膝关节置换术（UKA）已成为一种标准化的常规技术。在确定UKA适应症方面经验的增加以及假体设计和材料的改进带来了更好的效果。AMC UKA具有无约束活动轴承，在0度至30度屈曲范围内具有全等面积接触。其原理是，一个聚乙烯活动轴承，上方为凹球形，下方为平面，可在球形金属股骨髁和平面金属胫骨平台之间保持完美贴合。这确保了两者之间能够以生理运动学方式完全自由地相互旋转和滑动，且固有稳定性较低。低接触应力导致聚乙烯磨损减少。本研究中的361例AMC UKA置换术显示了假体的安全固定以及活动轴承的良好耐用性。所研究患者的临床结果表明AMC UKA是一个成功的理念。30例微创UKA与30例传统UKA及30例全膝关节置换术的比较显示，微创技术在缩短康复时间方面具有优势。传统技术和微创技术在植入准确性方面相当。
