Ishii Orthopaedic and Rehabilitation Clinic, Gyoda Saitama, Japan.
J Arthroplasty. 2011 Feb;26(2):255-9. doi: 10.1016/j.arth.2010.05.023.
The purpose of this study was to clarify the changes between preoperation and postoperation in each posterior condylar offset (PCO) using computed tomography (CT) and to compare them to conventional radiographic (x-ray) evaluation in total knee arthroplasty. One hundred nine knees in 97 patients were evaluated. The medial PCO was significantly larger before surgery. The lateral PCO was significantly larger after surgery. Changes in the PCO on x-ray showed no significant correlation with the changes observed in the CT-evaluated medial (R = 0.028) and lateral PCO (R = 0.190). Changes in PCO observed by x-ray did not reflect those of the medial or lateral condyles on CT. We recommend CT-based evaluation of PCO by condyle when assessing the influence of PCO on range of motion following total knee arthroplasty.
本研究旨在通过计算机断层扫描（CT）阐明全膝关节置换术中每个髁后偏移（PCO）在术前和术后的变化，并将其与传统放射学（X 射线）评估进行比较。共评估了 97 名患者的 109 个膝关节。术前内侧 PCO 明显较大。术后外侧 PCO 明显较大。X 射线检查中 PCO 的变化与 CT 评估的内侧（R=0.028）和外侧 PCO（R=0.190）的变化无显著相关性。X 射线检查中 PCO 的变化并不反映 CT 上内侧或外侧髁的变化。我们建议在评估 PCO 对全膝关节置换术后关节活动范围的影响时，通过髁进行基于 CT 的 PCO 评估。
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