- Research Article
- 10.13107/jocr.2026.v16.i05.7298
The Computed Tomography-based Morphometry of Thoracolumbar Junction (T11\u2013L2) in Western Indian Population: Implications for Transpedicular Screw Fixation
- May 01, 2026
- Journal of Orthopaedic Case Reports
- Sandeep Kumar Yadav + 5 more +5
Introduction:Morphometric data for safe transpedicular screw placement at the thoracolumbar junction (T11–L2) remain limited for Indian populations, despite ethnic variations affecting screw sizing and complications. This study provides prospective computed tomography-based reference values for Western India.Materials and Methods:Prospective analysis of 200 consecutive adults (≥20 years; 110 males, 90 females) with back pain but normal thoracolumbar imaging (June 2021–August 2023) at a Western Indian tertiary center was conducted. Ethical approval taken from Institutional Ethics Committee, AIIMS Jodhpur (IEC No.- AIIMS/IEC/2022/4070). The bilateral pedicle width, interpedicular distance (IPD), anterior cortex depth, and transpedicular angle measured at T11–L2 using digital imaging and communications in medicine viewer (1–2 mm slices). Means ± standard deviation were compared by sex using unpaired t-tests (P < 0.05 significant; Excel).Results:Pedicle width increased caudally (T11: 5.14 ± 0.87 mm; L2: 6.39 ± 0.89 mm), with male > female at T12/L1 (P < 0.01). IPD rose from T11 (1.74 ± 0.20 cm) to L2 (2.15 ± 0.20 cm; L1 P = 0.039 by sex). Transpedicular angle: T11 (19.96 ± 2.20°) to L2 (23.06 ± 1.42°; all P < 0.05 by sex). Anterior cortex depth peaked at L1 (5.05 ± 0.86 cm). Safe screws: Thoracic 4.5–5.5 mm, lumbar 5.5–6.5 mm.Conclusion:Western Indian norms show narrower pedicles than Western data, aligning with other Indian series but adding a T11–L2 focus. This aids in ethnicity-specific screw selection to reduce misplacement in thoracolumbar fixation.
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