目的通过尸体解剖及DR-X线摄片系统观测儿童肱骨远端泪滴影的解剖形成及前倾角度。方法利用细铅丝在儿童肘关节尸体标本上模拟肱骨远端泪滴影以探讨其解剖形成,同时利用细铅丝模拟肱骨小头及滑车的形状,通过DR-X线摄片测量肱骨小头及滑车的前倾角度。结果泪滴影前部、后部及下部的致密影分别由肱骨远端冠状窝后缘、鹰嘴窝前缘及滑车相对区肱骨干骺端骺板下骨形成。肱骨小头前倾角为(42.63±2.24)°,滑车前倾角为(10.58±2.82)°。结论儿童肱骨远端泪滴影分别由冠状窝后缘、鹰嘴窝前缘及滑车相对区肱骨远端干骺端骺板下骨等三部分围绕形成,其结构变化可作为诊断隐匿型或者无移位肱骨髁上骨折的参考指标;肱骨远端骨折复位时应注意恢复肱骨小头、肱骨滑车的前倾角度。 Objective To observe the anatomic formation and anteversion angle of distal humerus tear drop by autopsy and DR-X ray system. Methods The thin lead wire was used to simulate the distal humerus tear in the elbow of children to explore its anatomy. At the same time, the use of fine lead wire to simulate the humeral head and the shape of the block, the humeral head and the block were measured by DR-X- Forward incline angle. Results Teardrop shadow of the front, rear and lower dense shadow respectively by the distal humerus coronal fossa, olecranon fossa front and hump relative area humeral metaphyseal epiphyseal plate under the bone formation. The anterior tilt angle of the humerus head was (42.63 ± 2.24) ° and the anteversion angle was (10.58 ± 2.82) °. Conclusions The distal humerus tear drop shadow was formed by the coronal fossa posterior margin, the olecranon fossa anterior margin and the relative humeral humerus distal metaphysis epiphysis under the bones and other three parts around the formation of its structural changes can be used as a diagnostic concealed or without Displacement of the supracondylar fractures of the reference index; reduction of distal humerus fractures should pay attention to the recovery of the humeral head, humeral pulley anteversion angle.