Authors: Xiguang Tian Jiazhen Li Weichao Sheng Dongbin Qu Jun Ouyang Dachuan Xu Shenghua Chen Zihai Ding
Publish Date: 2009/11/20
Volume: 32, Issue: 5, Pages: 455-462
Abstract
We evaluated the length inner width and angle of three screw trajectories starting at the iliac tubercle posterior superior iliac spine and posterior inferior iliac spine toward the anterior inferior iliac spine Measurements were made on specimen two and 3D computed tomography using 18 embalmed cadaveric pelvesThere was no significant difference among three measure methods The path between the posterior superior iliac spine and anterior inferior iliac spine had the largest iliac column length with 135 mm in male and 110 mm in female The canal allowed placement of 8mm screw in male and 65 mm in female with the angle of 25° laterally directed from the midsagittal plane The line between the posterior inferior iliac spine and anterior inferior iliac spine was below or just located at the top of greater sciatic notch in the majority measurements The safe section for transiliac screw approximately located above the greater sciatic notch and could be divided into anterior and posterior partsThe measurements among anatomic measurement 2D and 3D computed tomography are consistent The screw path from the posterior superior iliac spine toward anterior inferior iliac spine provided the longest anchor site At the same time the line between the posterior inferior iliac spine and anterior inferior iliac spine is not available for transiliac screw insertion of eastern population The posterior of the safe section also can be regarded as another ilium anchorage area for transiliac screws
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