Author/Editor		Smrke, Dragica
Title		Klinična, rentgenološka in biomehanska analiza vgraditve kolčnih endoprotez pri medialnih zlomih vratu stegnenice
Type		monografija
Place		Ljubljana
Publisher		Univerza v Ljubljani, Medicinska fakulteta
Publication year		2000
Volume		str. 66
Language		slo
Abstract		Femoral neck fracture, which often occurs in the elderly can be treated by implantation of hip endoprosthesis. In this work we analysed the outcome of the 414 hips that were treated by implantation of bipolar partial or total hip endoprosthesis due to medial femoral neck fracture in the period from January 1,1988 to December 31, 1996. The outcome was evaluated regarding the clinical, biomechanical and rentgenographic status of the hip. The first part of the work considers the choice and establishment of the methods for evaluation of the hip status. The clinical status of the hip was evaluated by the Harris hip score. To evaluate the biomechanical status of the hip we used a mathematical model of the one-legged stance which yields the resultant hip force and the corresponding stress distribution over the weight bearing area. The model takes into account the hip and pelvis geometry for each individual. The geometrical parameters were determined from standard anteroposterior and axial rentgenograms by using a computer aided system. We suggest for the parameter that represents the biomechanical score of the hip the maximal value that the radial stress attains at the weight bearing area (pmax). The radiographic status of the hip was evaluated by the parameters, such as inclination of the neoacetabulum, migration of the hip endoprosthesis with respect to the geometry of the hip joint, osteosclerosis, osteolysis, osteoporosis, fracture of cement, radiolucency between bone and cement and between cement-hip endoprosthesis and periarticular ossification. We found that in the hip with implanted bipolar hip endoprosthesis the clinical and the biomechanical hip score are interdependent. The linear dependence is statistically significant. (Abstract truncated at 2000 characters.)
Descriptors		FEMORAL NECK FRACTURES HIP PROSTHESIS HIP JOINT BIOMECHANICS WEIGHT-BEARING PHYSICAL EXAMINATION DIAGNOSIS, COMPUTER-ASSISTED