IJOCP | Volume – 2015| Issue – 2015| Article ID – 2015:75
Conference: Indian Orthopaedic Association Annual Conference IOACON-2013,      India [Click for Full details]  

Authors: Ganesan S, Acharya S

Authors Affiliations:

Address of correspondence: sudhir_axon@yahoo.co.in


Abstract                                                                                                                 

Introduction: Various studies suggest the importance of sagittal alignment and sacropelvic parameters in spinal and hip disorders.We aimed to study the normal thoracic kyphosis, lumbar lordosis,sacropelvic parameters and sagittal alignment of the spine in a prospective cohort of 100 asymptomatic adults of Indian population without any spinal pathology.

Materials and Methods: A prospective cohort of 100 asymptomatic adults without spinal pathology were included. There were 63 males and 37 females with an average age of 41.9 and 39.9 years respectively. For each subject, thoracic kyphosis, lumbar lordosis, pelvic incidence (PI), pelvic tilt (PT), sacral slope (SS) and sagittal alignment by C7 plumb line were measured from standing lateral radiographs in a long cassette extending from C2 to S1 including both the femoral heads. Ratios of SS to PI (SS/PI), PT to PI (PT/PI), and PT to SS (PT/SS) were also calculated.

Results: The mean ± 2 standard deviations (SD) range was 32.5° (18.4°-58.9°) and 53.1° (30.3°-77.5°) for thoracic kyphosis and lumbar lordosis respectively. The mean ± 2 standard deviations (SD) range was 37.1° (28.6°-46°), 17.1° (9.9°-26.9°), 54.2° (44.4°-58.2°) for sacral slope, pelvic tilt and pelvic incidence respectively. There was no statistically significant difference in pelvic incidence, sacral slope, pelvic tilt, PT/PI, SS/PI, or PT/SS between males and females. The sagittal balance was between -1.8 to +2.5 cm from posterosuperior corner of S1.PI was not related to age in either sex group. PT and SS, increased and decreased slightly with aging respectively to compensate for the decreasing lumbar lordosis. PT, SS, PT/PI, SS/PI, and PT/SS presented only weak correlation coefficients (r £0.41) with respect to age.

Conclusion: The current study is the first largest cohort study of asymptomatic adults in Indian literature dedicated to the evaluation of sagittal alignment of the spine and sacropelvic parameters. This study provides invaluable information to clinicians about the normal range of values which will be useful to evaluate pathological conditions associated with abnormal angular parameter values and in calculating the corrections to be obtained during treatment.

How to Cite this Abstract
Ganesan S, Acharya S. Radiographic analysis of the sacropelvic parameters and sagittal alignment of the spine in asymptomatic subjects in Indian population . International Journal of Conference Proceedings 2015;(2015):75