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Year : 2021  |  Volume : 9  |  Issue : 1  |  Page : 25-30

A computed tomography-guided analysis of pedicle morphology of the lower thoracic and lumbar spine in the Indian population: An observational study

1 Department of Orthopaedics, Gandhi Medical College, Bhopal, Madhya Pradesh, India
2 Department of Preventive and Social Medicine, Gandhi Medical College, Bhopal, Madhya Pradesh, India

Correspondence Address:
Dr. Santosh Kumar Mishra
Department of Orthopaedics, Gandhi Medical College, Bhopal - 462 001, Madhya Pradesh
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/JOASP.JOASP_48_20

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BACKGROUND: The knowledge of morphometric characteristics of the pedicle is crucial for successful transpedicular screw fixation. Since differences are reported across various ethnic populations; hence, this study was conducted to analyze the morphometry of pedicle from D6-S1 vertebrae among the population of central India. MATERIALS AND METHODS: The prospective cross-sectional observational, study was conducted on 102 patients between January 2018 and March 2019 at a tertiary center in central India with spinal pathology. After the initial workup of each patient, computed tomography scan images of the dorso-lumbosacral spine were obtained. Morphometric characteristics from D6-S1 vertebrae studied in three parameters including transverse pedicle isthmus width (TPIW), pedicle length (PL), and transverse pedicle angle (TPA). RESULTS: In this study, the highest TPIW was observed at S1 and narrowest at T6. In the lumbar region, the widest pedicle was at L5 while in the thoracic region widest TPIW was at T12. The highest PL was observed at S1 with the minimum at T7 level. In the lumbar region, the longest mean PL was found at L2 and shortest at L5. In the thoracic region longest PL was observed at the T12 level. The mean of TPA at thoracic level was <10° except at T7 level at which its value was slightly higher. At the lumbar region, value of TPA increased gradually. There was no statistically significant association of gender with morphometric measures. CONCLUSION: The study includes morphometric analysis of thoracolumbar vertebrae including S1. Hence, giving a rational approach for transpedicular screw fixation taking into consideration of racial variations.

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