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首页> 外文期刊>Journal of shoulder and elbow surgery >Geometrical analysis of Copeland surface replacement shoulder arthroplasty in relation to normal anatomy.
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Geometrical analysis of Copeland surface replacement shoulder arthroplasty in relation to normal anatomy.

机译：谷轮表面置换肩关节置换术与正常解剖结构的几何分析。

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摘要

This study examines the effect of humeral head surface replacement on the geometry of the arthritic glenohumeral joint and correlates changes to clinical outcome. Thirty-nine patients undergoing resurfacing arthroplasty were prospectively followed up clinically and radiologically for a mean of 38 months (range, 24 to 72 months). Measurements were taken from coronal radiographs by use of a validated technique. There was an estimated mean 6 mm erosion of preoperative lateral offset (coracoid base to greater tuberosity). The prosthesis reduced the humeral head radius by a mean of 3.5%. Humeral offset (greater tuberosity to center of instant rotation) increased by a mean of 5 mm (95% CI, 3.8 to 6.4; P<.01). Mean age-/sex-adjusted Constant scores improved from 26 to 83 points (P<.01). The improved postoperative motion showed a nonlinear relationship with humeral offset. We conclude that surface replacement restores humeral offset and the lever arm of the deltoid and supraspinatus while otherwise mimicking individual anatomy. Function depends on adequate restoration of this lever arm without overstuffing the joint.
机译：这项研究检查了肱骨头表面置换对关节炎性肱肱关节几何形状的影响，并将其变化与临床结果相关联。前瞻性对39例行表面置换术的患者进行了临床和放射学随访，平均38个月（24至72个月）。使用经过验证的技术从冠状X线片上进行测量。术前侧向偏移估计为平均6 mm侵蚀（喙突基底至更大结节）。假体使肱骨头radius骨平均缩小了3.5％。肱骨偏移（到即时旋转中心的较大结节）平均增加了5毫米（95％CI，3.8至6.4; P <.01）。平均年龄/性别调整后的恒定得分从26分提高到83分（P <0.01）。改善的术后运动表现出与肱骨偏移的非线性关系。我们得出的结论是，表面置换可恢复肱骨偏移以及三角肌和棘上突的杠杆臂，同时还能模仿个体解剖结构。功能取决于该杠杆臂的适当恢复而不会过度填充关节。

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