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International Journal of Morphology

On-line version ISSN 0717-9502

Abstract

DONG, Qiang; TIAN, Wei  and  MA, Baotong. Evaluation and Clinical Application of Sacral S1 Vestibule Measurements in Chinese Adults. Int. J. Morphol. [online]. 2014, vol.32, n.1, pp.202-207. ISSN 0717-9502.  http://dx.doi.org/10.4067/S0717-95022014000100034.

This study aims to measure the anatomic parameters of the sacral 1 (S1) vestibule in Chinese adults and to discuss their clinical application during iliosacral screw fixation for pelvic posterior ring injury. Three-dimensional computed tomography (CT) reconstructions were performed on 36 individuals, and the parameters of their S1 vestibules were measured. Vestibular width (VW) was 25.15±2.91 mm, vestibular height (VH) was 20.94±3.03 mm, and mean vestibular size (VS) was 400.23±85.11 mm2. The mean angle of superior inclination was 30.85°±9.22°, and the mean anterior inclination (AI) was 13.91°±6.25°. VW and VS were significantly smaller in females than in males (p<0.05), but no statistical differences were found between the left and right sides. The S1 vestibules of Chinese patients are smaller than those reported for Caucasians. Therefore, the placement of iliosacral screws should be considered carefully based on the size, gender, and ethnicity of the patient. The anatomic parameters of females were much smaller than those of males and close to the minimum requirement for fracture fixation. Therefore, female Chinese patients who need iliosacral screws should undergo preoperative CT scans to measure S1 vestibule parameters to make individual operational plans.

Keywords : Sacral vestibule anatomy; Sacroiliac joint; Bone screws.

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