关键词: 肱骨;体层摄影术，X线计算机;形态学

    摘 要:目的 研究肱骨尤其肱骨远端的特殊解剖形态，描述其结构特点，促进肱骨内固定器材研究和改进. 方法 选用青壮年不成对肱骨12根，用3DCT(three dimensoinal com-puted tomography)扫描并重建，对骨表面及髓腔进行全方位测量. 结果 肱骨干大小结节以下大致呈圆柱体，其远段距髁部(6.524±0.625)cm(前屈距)处有向前弯曲，称前屈角，为(13.98±0.48)°.髁上部逐渐变薄向内外扩伸形成内上髁及外上髁，被鹰嘴窝和冠突窝分隔形成两支称内上髁支和外上髁支，其中内上髁支宽:(1.458±0.096)cm，厚:(1.382±0.102)cm，外上髁支宽:(2.073±0.093)cm，厚:(1.583±0.067)cm，与纵轴夹角称内上髁角和外上髁角，分别为:(28.29±0.57)°和(34.15±0.65)°.髓腔于髁上变宽薄，逐渐闭锁. 结论 肱骨干髓腔无明显狭部，上端略大，向下端逐渐减小，未端矢径减小，冠径逐渐增大，不向内外上髁支延伸.髁部前屈角，前屈距，内上髁角以及外上髁角等测量值变异不大.

    Analysis of humeral morphology in chine by three dimensional computedtomography

    LI Jian-Wu，WANG Zhen，HUAN Yi，SUN Jing，SUN Yin-Zhong

    Department of Orthopedics and Traumatology，Xi-jing Hospital，Fourth Military Medical University，Xi'an710033，China

    Keywords:humerus;tomography，X-ray computed;mor-phology

    Abstract:AIM To understand the special configuration of humerus and distal humerus，depict and nam it using the new anatomy words，in order to improve humerus internal fixat-ion.METHODS Angles and lengths of the bones and the marrow cavities of12fresh humerus reconstructed by three dimensional computed tomography were measured.RE┐SULTS Forward flexure of distal humeral naming forward flexure angle was(13.98±0.48)° ......