摘要
目的应用CT三维重建技术测量骶髂关节理想螺钉的形态,并验证其准确性与探讨其临床意义。方法应用CT三维重建技术,对11例冰冻正常成人骨盆标本左右侧骶髂关节进行模拟骶髂螺钉内固定术,并测量骶髂关节理想螺钉的形态;根据CT测量结果,在11例骨盆标本(22个骶髂关节)上进行个体化置钉验证。结果理想螺钉的长度与最大直径分别为(87.62±1.68)mm与(20.26±1.20)mm,理想螺钉与冠状面、水平面的夹角分别是(25.85±1.06)°与(19.79±1.60)°,进针点与髂后上、下棘的距离分别为(37.02±1.67)mm与(38.30±1.14)mm;左右侧骶髂关节所置螺钉均安全、准确到达预定位置。结论应用CT三维重建技术模拟骶髂螺钉内固定术,可准确测量骶髂关节理想螺钉的形态并进行评估,对术中置入螺钉的进针点、角度和形态的选择有指导意义;同一个体左右侧骶髂关节理想螺钉的形态无明显差别。
Objective To study the application of three-dimensional computed tomography（CT） reconstruction in measuring the morphometry of ideal screw of the sacroiliac joint,validate the accuracy and explore the clinical significance.Methods The left and right sacroiliac joints of 11 frozen pelvic specimens of normal adults underwent internal fixation using sacroiliac screw by three-dimensional CT reconstruction,and the ideal shapes of the sacroiliac screw were measured.According to the measurement results,11 pelvic specimens（22 sacroiliac joints） were individually validated by the iliosacral screws.Results The diameter of the deal screw was（20.26±1.20） mm,and the length was（87.62±1.68） mm.The direction of the ideal screw was（25.85±1.06）° to the coronal plane,and（19.79±1.60）° to the horizontal plane.The distance from the entry point to the posterior superior iliac spine was（37.02±1.67） mm,and to the posterior inferior iliac spine（38.30±1.14） mm.All the inserted iliosacral screws of the left and right sacroiliac joints were entirely within the pedicle.Conclusion The ideal shapes of the screw of the sacroiliac joint can be accurately measured and evaluated,and the selection of the entry point,angle and shape of the screw of the sacroiliac joint can be directed by the simulation of the internal fixation operation using sacroiliac screw using three-dimensional CT reconstruction.There is no significant difference between the shapes of the left and right ideal screw in the same individual.
出处
《华南国防医学杂志》
CAS
2012年第3期208-211,218,共5页
Military Medical Journal of South China
关键词
骶髂关节
骶髂螺钉
CT
Actciliac joint
Sactciliac screw
Computed tomography
