Author/Editor		Ipavec, M; Iglič, A; Kralj-Iglič, V; Antolič, V
Title		Vpliv nesferičnosti kolčnega sklepa na porazdelitev radialne napetosti v kolčni sklepni plasti
Translated title		Influence of nonspherical shape of the femoral head on the compressive stress in the hip joint articular layer
Type		članek
Source		In: Zajc B, editor. Zbornik 6. elektrotehniške in računalniške konference ERK'97. Zvezek B. Računalništvo in informatika, umetna inteligenca, robotika, razpoznavanje vzorcev - 3. letna konferenca SDRV, biomedicinska tehnika, močnostna elektrotehnika, didaktika, študentski članki; 1997 sep 25-27; Portorož. Ljubljana: Slovenska sekcija IEEE,
Publication year		1997
Volume		str. 351-4
Language		slo
Abstract		It is the aim of this work to calculate the compressive loading stress in the articular layer of the human hip allowing for small deviations from the sphericity of the femoral head and of the acetabular shell. The femoral head and the acetabular shell are assumed to be shaped as rotational elipsoids with arbitrary semiaxes. In this case the compressive stress delta can be expressed analitically. If the deviation from the sphericity is small, it is obtained that delta = delta0.cos gamma(1 + 3 ( delta R / over r)/sin2/ gamma), where delta0 is a constant, gamma is the angle between the stress pole and the point of the observation, delta r is the difference between the semiaxes lenght of the acetabular ellipsoid, and r is the average lenght of the semiaxes of the acetabular ellipsoid. If both, the femoral head and te acetabulum are assumed to be spherical, the known dependence delta = delta0.cos gamma (3) is recovered.
Descriptors		HIP JOINT BIOMECHANICS MODELS, THEORETICAL FEMUR HEAD ACETABULUM