Abstract：
We report a series of 95 consecutive patients operated on for total trapeziometacarpal joint replacement, screening for radiological characteristics to differentiating patients with and without preoperative MCP hyperextension. Loss of thumb column length and metacarpal head circularity on lateral view were quantified. Statistically, a combination of reduced length and circular metacarpal head was a determining factor for MCP hyperextension. We therefore believe it is essential to restore thumb column length in surgery for trapeziometacarpal osteoarthritis and to avoid trapeziectomy in patients with a circular head on lateral view. LEVEL OF EVIDENCE: III; prospective cohort study.
摘要：
我们报告了一系列95例连续接受全梯形掌关节置换手术的患者，筛查放射学特征，以区分术前有无MCP过度伸展的患者。对拇指柱长度和掌骨头圆度的缺失进行量化。统计上,长度减少和圆形掌骨头的组合是MCP过度伸展的决定因素。因此，我们认为，在治疗梯形掌骨骨关节炎的手术中，必须恢复拇指柱的长度，并避免在侧面看头部圆形的患者中进行梯形切除术。证据水平：III；前瞻性队列研究。
