A biomechanical analysis of the abduction power of the hip after chiari pelvic osteotomy using two dimentional computer simulation.

概要

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Biomechanical effects of the Chiari pelvic osteotomy were evaluated using two dimentional computer simulation by Kawai's Rigid Body Spring Model. These results were compared with clinical outcomes. 176 patients who had Chiari pelvic osteotomy in our clinic were available for this study. Their abduction power of the hip was measured by Cybex and that was analyzed using the simulation.The results were as follows.1) The abduction power of the hip was decreased temporally after the operation, but was gradually increased to the preoperative level in 6 to 9 months.2) In the younger patients, the abduction power was restored in early period.3) The vector direction of the abductor muscles were changed medially with hip abduction by the simulation.
西日本整形・災害外科学会の論文