Silberstein M J, Brodeur A E, Graviss E R
J Bone Joint Surg Am. 1979 Mar;61(2):244-7.
The capitellum is the first epiphyseal center of the elbow to ossify. Its normal position is easily subject to misinterpretation as a separation fracture because: (1) the ossification center for the capitellum is situated anteriorly, (2) it is often tilted downward during development, and (3) its epiphysis tends to be wider posteriorly than anteriorly. The capitellum frequently fuses with the trochlea and lateral epicondyle before uniting with the humerus. We reviewed the normal anatomical configuration of the elbow. Some useful methods for evaluating the position of the normally situated and minimally displaced capitellum and distal end of the humerus are presented.
肱骨小头是肘部最早开始骨化的骨骺中心。其正常位置很容易被误解为分离骨折，原因如下：（1）肱骨小头的骨化中心位于前方；（2）在发育过程中它常常向下倾斜；（3）其骨骺的后部往往比前部更宽。肱骨小头在与肱骨融合之前常常先与滑车和外侧髁融合。我们回顾了肘部的正常解剖结构。介绍了一些评估正常位置及轻度移位的肱骨小头和肱骨远端位置的有用方法。
