Brownhill James R, King Graham J W, Johnson James A
Bioengineering Research Laboratory, Hand and Upper Limb Centre, St Joseph's Health Care London, London, Ontario, Canada.
J Shoulder Elbow Surg. 2007 May-Jun;16(3 Suppl):S126-32. doi: 10.1016/j.jse.2006.01.018. Epub 2007 Apr 6.
This study determined the relationship between the medullary canal axis and the flexion-extension axis of the distal humerus as they relate to implant selection and design for elbow arthroplasty. Computed tomography scans of 40 fresh-frozen cadaveric specimens were analyzed with computer-aided design software. The anterior offset and cubital angle were measured between the 2 axes, and the cross-sectional area and diameter were measured for the medullary canal at various intervals. The anterior offset of the flexion-extension axis from the medullary canal axis was proportional to the length of canal used to determine the stem axis. No correlation was established among the width of the articular surface, anterior-posterior canal curvature, and cubital angle. These findings suggest that modular implants that allow for the variability in the natural anterior bow and articular offset of the distal humerus may enhance proper restoration of the flexion-extension axis of the elbow.
本研究确定了肱骨髓腔轴线与肱骨远端屈伸轴线之间的关系，因为它们与肘关节置换术的植入物选择和设计相关。使用计算机辅助设计软件对40个新鲜冷冻尸体标本的计算机断层扫描进行分析。测量两轴线之间的前偏移和肘角，并在不同间隔测量髓腔的横截面积和直径。屈伸轴线相对于髓腔轴线的前偏移与用于确定柄轴线的髓腔长度成正比。关节面宽度、髓腔前后曲率和肘角之间未建立相关性。这些发现表明，允许肱骨远端自然前弓和关节偏移存在变异性的模块化植入物可能会增强肘关节屈伸轴线的正确恢复。
