Effect of patient-specific model scaling on hip joint reaction force in one-legged stance - study of 356 hips.

摘要: PURPOSE Estimation of hip joint loading is fundamental for understanding function, injury and disease. To predict patientspecific loading, a musculoskeletal model must be adapted to the patient's unique geometry. By far most common cost effective clinical images are whole pelvis plain radiographs. This study compared accuracy anisotropic isotropic scaling force prediction by taking patient-specific bone geometry from standard anteroposterior radiograms. METHODS 356 hips 250 radiograms adult human were analyzed. A was constructed sequential Visible Human Male. The body position one-legged stance substituted midstance phase walking. Three methods applied: a) interhip separation, ilium height, width, lateral inferior greater trochanter, b) pelvic width c) separation. Hip in estimated inverse static model. RESULTS Isotropic affects all proportions equally, what results small difference reaction among patients. Anisotropic increases variation patients considerably. may surpass weight. CONCLUSIONS depends mostly on reference Individual's estimation could improved including additional geometrical parameters method.