Ryd L, Albrektsson B E, Herberts P, Lindstrand A, Selvik G
Department of Orthopedics, University Hospital, Lund, Sweden.
Clin Orthop Relat Res. 1988 Apr(229):205-12.
Micromotion of the tibial component of eight Freeman-Samuelson arthroplasties without cement for gonarthrosis were followed for two years and studied by roentgen-stereophotogrammetric analysis (RSA). In five cases, displacement over time was studied, and in all cases migration was found to range from 0.7 to 4.8 mm after two years. One tibial component migrated continuously during the period studied, while the remaining prostheses migrated mostly during the first six months. The direction of the migration was erratic. Inducible displacement ranging from 0.8 to 5.0 mm was found in all cases. Clinically, all of the patients were scored as successful although one with continuous migration had the lowest score. This degree of micromotion is compatible with good results after two years, and appears to be a characteristic of the immediate interlocking fixation used in the Freeman-Samuelson prosthesis.
对八例用于膝关节病的非骨水泥型弗里曼 - 萨缪尔森人工关节置换术的胫骨部件进行了两年的微动跟踪，并通过X线立体摄影测量分析（RSA）进行研究。在五例病例中研究了随时间的位移，发现在所有病例中，两年后迁移范围为0.7至4.8毫米。在研究期间，一个胫骨部件持续迁移，而其余假体大多在头六个月内迁移。迁移方向不稳定。在所有病例中均发现可诱导位移范围为0.8至5.0毫米。临床上，所有患者均被评为成功，尽管有一例持续迁移的患者得分最低。这种微动程度与两年后的良好结果相符，并且似乎是弗里曼 - 萨缪尔森假体中使用的即时联锁固定的一个特征。
