Franzén H, Mjöberg B, Onnerfält R
Department of Orthopedics, Lund University Hospital, Sweden.
Clin Orthop Relat Res. 1993 Feb(287):131-4.
Roentgen stereophotogrammetric analysis (RSA) was used to evaluate the migration in 17 cemented acetabular components after revision operations for mechanical loosening. All of the hips were examined four months and one year after surgery; ten of the hips were also examined after two years. In 15 of the 17 components, definite migration (0.5-2.7 mm) was identified, whereas two acetabular components showed no significant migration (< 0.25 mm). In 13 hips, the migration was seen within four months after surgery. There was a tendency for larger migration in revisions for severe bone destruction. These findings indicate that prosthetic fixation in revision operations is relatively poor. In cases with severe bone loss, cement fixations is extremely poor.
采用X线立体摄影测量分析（RSA）评估17例因机械性松动而翻修的骨水泥型髋臼假体组件的移位情况。所有髋关节均在术后4个月和1年进行检查；其中10例髋关节在术后2年也进行了检查。在17个组件中的15个中，发现有明确的移位（0.5 - 2.7毫米），而两个髋臼组件未显示出明显移位（< 0.25毫米）。在13例髋关节中，术后4个月内可见移位。对于严重骨破坏的翻修病例，有更大移位的趋势。这些发现表明翻修手术中假体固定相对较差。在严重骨缺损的病例中，骨水泥固定极其不佳。
