Author/Editor		Stankovski, Vlado; Kersnič, Boštjan; Smrke, Dragica; Iglič, Aleš; Kralj-Iglič, Veronika
Title		Difference in size of hip-joint weight bearing area in male and female population
Type		članek
Source		In: Ashton-Miller JA, editor. Proceedings of the 10th international conference on mechanics in medicine and biology; 1998 Mar 2-5; Waikiki, Honolulu. Waikiki: Pacific centre of thermal-fluids engineering (PCTFE),
Publication year		1998
Volume		str. 248-50
Language		eng
Abstract		The aim of the conducted study was to compare the size of hip-joiont weight bearing area in male and female population. A computer system was used to estimate hip-joint weight bearing area for 21 male and 79 female human subjects in one-legged stance. Standard AP radiographs taken from the archive of the Department of Orthopaedic Surgery at the University of Ljubljana, were used as input data. For all examined subjects the hip-joint geometry was found to be without pathological changes of the hip and the pelvis, therefore, only differences in the geometry of healthy hip-joints were observed. A three-dimensional model of stress distribution in the hip-joint articular surface is used to define the magnitude and the shape of the weight bearing area. A computer system in used to estimate some geometrical parameters of the pelvis and the femur, namely, the radius of the hip-joint articula surface, the centre-edge angle of Wiberg, the magnitude of the hip-joint reaction force and its direction, which enable us to determine the magnetude and the shape of the weight bearing area. To calculate the hip-joint reaction force and its direction a three-dimensional mathematical model of the hip in one-legged stance is used. To estimate imput data for each particular human subject a nonhomogeneous scaling method based on a reference model of the hip musculature by Dostal and Abdrws is included in the mathematical model of the hip. Our results show that the hip-joint weight bearing area is greather in males than in females. However, the portion of the articular sphere that represents a weight bearing area is greater in females than in males.
Descriptors		HIP JOINT WEIGHT-BEARING BIOMECHANICS MODELS, THEORETICAL