Feng Xiaoreng, Zhang Sheng, Luo Qiang, Fang Jintao, Lin Chaowen, Leung Frankie, Chen Bin
Department of Orthopaedics and Traumatology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China.
Department of Orthopaedics and Traumatology, Tongji Hospital, Huazhong University of Science and Technology, Wuhan 430000, China.
Injury. 2016 Mar;47(3):702-6. doi: 10.1016/j.injury.2016.01.026. Epub 2016 Feb 1.
The objective of this study was to define a safe zone for antegrade lag screw fixation of fracture of posterior column of the acetabulum using a novel 3D technology. Pelvic CT data of 59 human subjects were obtained to reconstruct three-dimensional (3D) models. The transparency of 3D models was then downgraded along the axial perspective (the view perpendicular to the cross section of the posterior column axis) to find the largest translucent area. The outline of the largest translucent area was drawn on the iliac fossa. The line segments of OA, AB, OC, CD, the angles of OAB and OCD that delineate the safe zone (ABDC) were precisely measured. The resultant line segments OA, AB, OC, CD, and angles OAB and OCD were 28.46mm(13.15-44.97mm), 45.89mm (34.21-62.85mm), 36.34mm (18.68-55.56mm), 53.08mm (38.72-75.79mm), 37.44° (24.32-54.96°) and 55.78° (43.97-79.35°) respectively. This study demonstrates that computer-assisted 3D modelling techniques can aid in the precise definition of the safe zone for antegrade insertion of posterior column lag screws. A full-length lag screw can be inserted into the zone (ABDC), permitting a larger operational error.
本研究的目的是使用一种新型三维技术确定髋臼后柱骨折顺行拉力螺钉固定的安全区域。获取了59名人类受试者的骨盆CT数据以重建三维（3D）模型。然后沿轴向视角（垂直于后柱轴线横截面的视图）降低3D模型的透明度，以找到最大的半透明区域。在髂窝上画出最大半透明区域的轮廓。精确测量了划定安全区域（ABDC）的线段OA、AB、OC、CD以及角OAB和角OCD。所得线段OA、AB、OC、CD以及角OAB和角OCD分别为28.46毫米（13.15 - 44.97毫米）、45.89毫米（34.
