Author/Editor		Stankovski, V; Iglič, A; Kralj-Iglič, V; Kersnič, B
Title		Estimation of the hip-joint reaction force R: a 100 cases study
Type		članek
Source		In: Miklavčič D, Bajd T, Stanič U, editors. Proceedings of the 9th international conference on mechanics in medicine and biology; 1996 Jun 30-Jul 4; Ljubljana. Ljubljana: Slovenian society of medical and biological engineering,
Publication year		1996
Volume		str. 580-3
Language		eng
Abstract		The geometrical parameters of the pelvis and the femur which influence the hipjoint reaction force were obtained automatically for 21 male and 79 female healthy human subjects from standard AP radiographs, by using a computeraided system. In addition, some geometrical parameters of the hip-joint which determine the magnitude and the shape of the weight bearing area of the hip-joint were also estimated. To calculate the hip-joint reaction force a three-dimensional mathematical model of the hip in one-legged stance was used. A nonhomogeneous scaling method based on a reference model of the hip musculature by Dostal and adrews was previously used in order to preparate the data as input to the mathematical model of the hip. Our results show that the magnitude of the hipjoint reaction force and its inclination angle are significantly greater for females than for males. Since females have in addition significantly smaller femoral head radius than males, it may be concluded that the stress in the hip-joint articular surface is higher in the female population relative to the male population. Because the increased stress in the hip-joint articular surface is unfavourable regarding the arthrosis development, the presented results could partially explain the fact that females have greater incidence of arthrosis in the hipjoint than males. This is related not only to femoral, but also to pelvic geometry.
Descriptors		HIP JOINT MODELS, THEORETICAL RANGE OF MOTION, ARTICULAR