Clinical Applied Anatomic Study And CT Measurement Of The Sacroiliac Screw Internal Fixation

[Objective] By studying the applied anatomy of Chinese adult pelvic posterior ring structure and CT measurement of the parameter of screw fixation for the sacroiliac joint to provide the related morphological data for the application of iliosacral screw fixation in sacroiliac joint disruption.[Method] â‘ 15 pelvis specimens of native adults were studied, a total of 30 sacroiliac joint anthropometric measurement were taken. From the most narrow part of pedicle of vertebral arch to the posterior-lateral surface of the iliac ala, a screw was implanted regressively along the central axis of pedicle of vertebral arch. The point on the iliac ala is the optimal entry point. Measure the direction of the screw, the length of the screw, long axis and short axis of S1,2 pedicle of vertebral arch and the adjacent structure of the sacroiliac joint etc. to find the optimal direction of screw and the length and caliber of screw to find the optimal direction of screw and the length and caliber of screw to confirm the optimal entry point.â‘¡30 pelvis of healthy native adults were scaned by CT to measure the broad and height of the pedicle of S1,2; The distance from the optimal entry point to contrary anterior cortex of S1,2vertebral body respectively, to the middle part of S1,2vertebral body respectively, to the most narrow part of the pedicle of S1,2 respectively. The distance from the optimal entry point to the posterior superior iliac spine(PSIS), to the posterior inferior iliac spine(PIIS), to the greater sciatic notch; and the distance between PSIS and PIIS. The direction of the centre axis of the pedicle of S1,2.[Result] 1, from S1 pedicle of vertebral arch: the shape of pedicle of vertebral arch...