The variability of sagittal spino-pelvic mobility in Indian population
Keywords:Spino-pelvic mobility, Stuck sitting, Stuck standing, Sagittal plane, Hip arthroplasty, Hip instability
Background: Abnormal spino-pelvic mobility is increasingly recognized as a leading cause for hip instability following arthroplasty.
Methods: We studied the lateral spino-pelvic radiographs of 90 patients, with no spine/hip pathology in standing and sitting positions. We measured the change in sacral slope and grouped them into three spino-pelvic patterns.
Results: We found that 50% of study subjects had normal spino-pelvic mobility. The remaining 50% were either hypermobile (24%) or stiff (26%). The stiff spines were either fixed (11%) or hypomobile (15%).
Conclusions: Our study shows that in a normal population without any prior hip/spine pathology a significant percentage (50%) have abnormal spino-pelvic mobility. The significance of spinal stiffness in younger age group need to be looked further to make any changes in acetabular cup placement during hip replacement.
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