Assessment of coxarthritis risk with dimensionless biomechanical parameters

Purpose: Unfavourable distribution of contact stress over the load bearing area is considered a risk factor for early coxarthritis and it interest to outline respective biomechanical parameters its prediction. The purpose work was develop transparent mathematical model which can be used assess in hip from imaged structures pelvis proximal femora, large population studies clinical practice. Methods: We upgraded previously validated three-dimensional human one-legged stance HIPSTRESS by introducing independent size images. new parameter – dimensionless peak normalized body weight radius femoral head (p max r 2 /W B ) on 172 hips that were childhood subjected Perthes disease exhibited increased proportion dysplastic hips. Results: p smaller number indecisive cases dysplasia predicted than (6% vs. 81%, respectively). A threshold an development H = found 2. Conclusions: proposed with border value as decisive are at degenerative processes presented method determination use nomogram.