Author/Editor		Dolinar, Drago
Title		Napovedna vrednost kolčnega sklepnega tlaka pri operativnem zdravljenju aseptične nekroze stegnenične glavice
Type		monografija
Place		Ljubljana
Publisher		Univerza v Ljubljani, Medicinska fakulteta
Publication year		2004
Volume		str. 54
Language		slo
Abstract		Introduction - The distribution of contact hip stress is an important factor which conditions the development of the hip joint. It is important to be familiar with the contact hip stress in order to understand the functioning of both a normal and a diseased hip. In the study we analysed the influence of contact hip stress on the development and the course of operative treatment of the hips subject to avascular necrosis of the femoral head. The avascular necrosis of the femoral head results from the ischaemic defect of a part of the femoral head. The disease represents a serious orthopaedic problem because its development is unpredictable and because it mostly affects young people. Consequently, the condition usually leads to an early development of arthrosis of the hip joint. Since the part of the femoral head affected by necrosis does not bear weight the distribution of stress over the rest of the area changes. We used a mathematical model to study how the size of the collapsed part and the position of necrosis on the femoral head affect the change of the contact hip stress. Patients and Methods - The study was performed on 47 patients (50 hips), who were treated for the avascular necrosis of the femoral head at the Department of Orthopaedic Surgery in Ljubljana between 1972 and 1991. The distribution of contact hip stress was evaluated in two groups of patients. The first group comprised 27 patients (30 hips), who were treated with intertrochanteric osteotomy. In this group the biomechanical status of the hips was determined in the early stage of the disease when the femoral head is still firm and bears weight on the whole. Since this kind of operative treatment changes the configuration of the hip area the biomechanical status was evaluated also after the operation. The second group of patients (20 patients / 20 hips) were treated by means of a vascularized bone transplant. (Abstract truncated at 2000 characters).
Descriptors		HIP JOINT FEMUR HEAD NECROSIS STRESS, MECHANICAL BIOMECHANICS WEIGHT-BEARING OSTEOTOMY BONE TRANSPLANTATION MODELS, THEORETICAL TREATMENT OUTCOME LOGISTIC MODELS