【摘要】 作者参照Abdu方法设计成经椎弓根椎体间内固定器治疗腰椎滑脱症,其特点为骶骨螺钉从S₁椎弓根斜向上、内、前方穿过椎间盘,进入L_s椎体,不穿透前方皮质骨.手术技术有相当难度、本文通过尸体解剖观察,旨在研究骶骨螺钉安全的进针点、进针方向和钉道长度,作者认为骶骨螺钉的植人应以S₁后孔上缘中点进针,冠状面内倾10°,结合X线侧位透视决定矢状面角度是安全的方法.更多还原

【Abstract】 Pedicular transvertebral screw fixation(PTSF) for treatment of lumbar spondylolisthesis has been established in reference of Abdu’ s method. The characteristic of PTSF is its sacral screw. It is inserted via the pedicules of S1 in anterosuperior and anteromedial direction, then directed across the sacral promontory, L5S1 intervertebral disc space and into the anterior part of L5 vertebral body, and the anterior L5 vertebral body cortex should not be penetrated. The technique of surgery is relatively difficult. The purpose of this study is to find safe insertion point, direction and screw length according to the results of anatomical analysis and observation. The midpoint of superior edge of the first posterior sacral foramen should be chosen as ideal insertion point,from which the sacral screw proceeds at 10?medial in the coronal plane and the degree in the sagittal plane determined by lateral X - film before operation or C -arm machine during operations.更多还原