全人工膝関節置換術による膝関節接触力の変化とその影響 : 第1報, 二次元モデルによる歩行動作時の解析

概要

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Total knee replacement changes the shapes of articular surfaces and the condition of cruciate ligaments depending on the type of artificial knee joints. This affects the contact conditions, i.e. contact forces and contact positions between femur and tibia. In order to evaluate and improve the performance of artificial knee joints it is necessary to recognize the variation of contact conditions to which the components are subjected during various motions. In this paper, the contact conditions between two components during gait were calculated using motion analysis, inverse dynamics and non-linear optimization methods on a two dimensional lower limb model, and moreover, a stress analysis on the fixation interfaces of tibial components was performed. Results indicated that differences in the shape of the articular surfaces and the condition of cruciate ligaments made remarkable differences in the contact conditions and stress distributions on the interface. It is generally considered that these differences would affect the loosening of the components and the life of the joints.
社団法人日本機械学会の論文
1999-01-25