A Computed Tomography-Based Assessment of the Anatomical Parameters Concerning S2-Alar Iliac Screw Insertion Using "Safe Trajectory Method" in Indian Population

• Published in: Asian spine journal 2023, 17(1), , pp.130-137
• Main Authors: Kaul, Rahul, Goswami, Bharat, Kumar, Khemendra, Jeyaraman, Madhan, Sangondimath, Gururaj, Chhabra, H S
• Format: Article
• Language: English
• Subjects: Clinical Study; computed tomography; indian population; s2 alar iliac screw; safe trajectory; 정형외과학
• ISSN: 1976-1902; 1976-7846
• DOI: 10.31616/asj.2022.0034

A retrospective computed tomography (CT)-based radiological analysis. To obtain CT-based morphometric data for the S2 alar iliac (S2AI) screw in the Indian population presenting to School of Medical Sciences and Research, Greater Noida, we used the concept of "safe trajectory" by Pontes and his colleagues in a recent study. Although previous CT-based morphometric studies on the S2AI screw have been published for a variety of ethnic groups, morphometric data specifically for the Indian population are scarce. We used the three-dimensional multiplanar reformatting software to conduct a retrospective CT analysis of 112 consecutive patients who met our exclusion criteria for various abdominal and pelvic pathologies. CT imaging planes were rotated between the S1 and S2 foramen until they matched the ideal S2AI screw trajectory, which was represented by the longest and widest iliac osseous channel observed in the axial CT section. Following the concept of a safe trajectory, S2AI screw morphometric parameters were measured on both sides of the pelvis using corresponding axial and sagittal CT images. In the sagittal and transverse planes on both sides of the pelvis, females had significantly higher screw trajectory angulation than males (p