Effect of sacral morphological changes in adults on the transverse sacroiliac screws of the third sacrum path

doi:10.13418/j.issn.1001-165x.2026.2.12

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Chinese Journal of Clinical Anatomy ›› 2026, Vol. 44 ›› Issue (2) : 201-205. DOI: 10.13418/j.issn.1001-165x.2026.2.12

Effect of sacral morphological changes in adults on the transverse sacroiliac screws of the third sacrum path

Zhang Yueteng, Zhang Yuanzhi, Liu Gang, Miao Pengpeng, Li Yi, Chang Qing*

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Abstract

Objective To examine the alterations in the shape of the sacrum and investigate its correlation with the presence of a third sacral segment sacroiliac screw pathway. Methods In a retrospective analysis involving 1,264 patients who underwent pelvic X-rays and CT scans between December 2013 and December 2023, comprising 539 males and 725 females aged 18 to 70 years with an average age of was (46.71±15.58) years, the patients were categorized into distinct groups based on their pelvic anatomy, and the presence or absence of related passages was examined within each group. Results The probability of the existence of the 3rd sacral segment channel in each group was as follows: normal sacrum was 40.30 %, acute lateral tilt of the sacral wings was 74.94 %, 79.84 % of the L5-S1 was intervertebral disk being parallel to the iliac crest, 93.64 % of the upper sacral foramen deviating from regularity, 57.21 % residual L5-S1 intervertebral disk, 81.73 % cleft of the tongue fossa, 72.82 % transitional vertebrae of the lumbar-sacral region, 89.13 % of the mastoid process, and 58.97 % of the sacral vertebral column defect. Conclusions In this study, various abnormal sacral morphologies all affect the existence of the S3 sacroiliac screw trajectory. When these morphological variations are present in the sacrum, the possibility of the presence of a bony canal in the third sacral segment is greater.

Key words

Sacrum / / / Anatomy / / / Sacroiliac joint / / / Screw pathway

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Zhang Yueteng, Zhang Yuanzhi, Liu Gang, Miao Pengpeng, Li Yi, Chang Qing. Effect of sacral morphological changes in adults on the transverse sacroiliac screws of the third sacrum path[J]. Chinese Journal of Clinical Anatomy. 2026, 44(2): 201-205 https://doi.org/10.13418/j.issn.1001-165x.2026.2.12

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