Introduction: An operating surgeon can carry out these treatments more accurately and safely if they are aware of slight anatomical heterogeneity. Prior to implant implantation, general orthopedic surgery guidelines encourage templating with precise measurements. It is known that there is a significant discrepancy between both the historically recorded diameter of the outer cortical and the effective cancellous diameter, suggesting that a safe screw selection might not always be possible with the use of traditional methods. It is strongly believed by the surgeon community that appropriate morphometric information on the lumbar pedicles is essential to undertake these treatments in a risk-free setting. Aims and Objectives: To determine and analyze the dimensions of lumbar vertebral pedicles in adult Indian population. Methods: This is a prospective and observational study conducted on 35 specimens of lumbar vertebrae. The study considered 35 dry, fully ossified, healthy lumbar vertebral pairs from the Department of Anatomy were used in the investigation. All vertebrae were divided into typical (L1 to L4) and atypical categories for the study (L5). The specimens were determined for variation in their dimensions and required analysis were carried out for proper analysis. Results: Pedicles in normal vertebrae (L1 to L4) ranged in length and height from 8.86 millimetres to 10 millimetres and 13.12 millimetres to 13.89 millimetres, respectively. The typical vertebra’s pedicle thickness ranged from 7.12 to 11.23 millimetres. PDL, PDH, and PDTh for L5 had mean values of 8.81 mm, 12.78 mm, and 16.11 mm, respectively. Pedicle axial length increased from L1 to L3 and then decreased from L4 to L5, with the mean transverse angle of the right and left side of the pedicle at L5 being larger than L4 (16.97 degrees and 15.82 degrees). The study found that there is shows statistically significant variations in the sizes of the pedicles of each of the five lumbar vertebrae. With the exception of height, a highly significant (P < 0.01) difference was seen for all measures. Conclusion: The study has concluded that there are significant differences in dimension of pedicles of both the typical and atypical variant of lumbar vertebrae.

Introduction: An operating surgeon can carry out these treatments more accurately and safely if they are aware of slight anatomical heterogeneity. Prior to implant implantation, general orthopedic surgery guidelines encourage templating with precise measurements. It is known that there is a significant discrepancy between both the historically recorded diameter of the outer cortical and the effective cancellous diameter, suggesting that a safe screw selection might not always be possible with the use of traditional methods. It is strongly believed by the surgeon community that appropriate morphometric information on the lumbar pedicles is essential to undertake these treatments in a risk-free setting. Aims and Objectives: To determine and analyze the dimensions of lumbar vertebral pedicles in adult Indian population. Methods: This is a prospective and observational study conducted on 35 specimens of lumbar vertebrae. The study considered 35 dry, fully ossified, healthy lumbar vertebral pairs from the Department of Anatomy were used in the investigation. All vertebrae were divided into typical (L1 to L4) and atypical categories for the study (L5). The specimens were determined for variation in their dimensions and required analysis were carried out for proper analysis. Results: Pedicles in normal vertebrae (L1 to L4) ranged in length and height from 8.86 millimetres to 10 millimetres and 13.12 millimetres to 13.89 millimetres, respectively. The typical vertebra’s pedicle thickness ranged from 7.12 to 11.23 millimetres. PDL, PDH, and PDTh for L5 had mean values of 8.81 mm, 12.78 mm, and 16.11 mm, respectively. Pedicle axial length increased from L1 to L3 and then decreased from L4 to L5, with the mean transverse angle of the right and left side of the pedicle at L5 being larger than L4 (16.97 degrees and 15.82 degrees). The study found that there is shows statistically significant variations in the sizes of the pedicles of each of the five lumbar vertebrae. With the exception of height, a highly significant (P < 0.01) difference was seen for all measures. Conclusion: The study has concluded that there are significant differences in dimension of pedicles of both the typical and atypical variant of lumbar vertebrae.