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SPINAL SAGITTAL ALIGNMENT AND BALANCE IN NORMAL NIGERIAN: GP46.

Kawu, Ahidjo Abdulkadiri1; Olawepo, Ayokunle2; Salami, Olayinka OA3; Kuranga, Sulaiman A4

Spine Journal Meeting Abstracts: October 2011 - Volume - Issue - [no page #]
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1University Of Abuja Teaching Hospital, Gwagwalada, Gwagwalada, Nigeria;

2University of Ilorin, Ilorin, Nigeria; 3National Orthopaedic Hospital, Lagos, Lagos, Nigeria; 4University of Ilorin Teaching Hospital, Ilorin, Ilorin, Nigeria

BACKGROUND: The clinical significance of sagittal plane alignment has been established. The aim of this study is to determine the radiographic parameters of the sagittal profile of the spine in Nigeria subjects and compare it to parameter in established studies to ascertain if there would be geographic and racial differences in the parameter observed.

METHODS: A digitized standing sagittal radiographs of the spine and pelvis of 100 asymptomatic subjects were evaluated using SurgimapSpine (DePuy Spine, USA) software. Lumbar lordosis, thoracic kyphosis, T9 sagittal offset, sacral slope, pelvic incidence, pelvic tilt, intervertebral angulation, and vertebral wedging angle from T9 to S1 were measured. The relationship between these parameters was explored using a descriptive and a multivariate analysis, and unpaired t‐test was used to establish the racial and geographic difference from findings of previous studies.

RESULTS: The mean values of maximum lumbar lordosis, sacral slope, pelvic tilt, pelvic incidence and T9 sagittal offset were 56° ± 8.2°, 38° ± 6.2°, 16° ± 7.4°, 51° ± 9.6° and 9.4° ± 2.7° respectively. These mean values of the parameter studied were lower without statistical significance, but with similar relationship between these parameters as noted in that of the Europeans.

CONCLUSION: With respect to the difference in mean values noted in the parameters studied, there is a need to establish an acceptable normal range of mean values of the radiographic parameters of the sagittal profile of the spine even when our study did not show statistical difference with that of the Europeans. This may be useful in the management of patient with spinal sagittal imbalance from different racial and geographic background.

Key‐words: Nigeria; sagittal balance; digitized radiograph; multivariate analysis

© 2011 Lippincott Williams & Wilkins, Inc.