A Biometrological Procedure Preceeding the Resurfacing

Abstract

This paper presents a preoperative hip reconstruction method with diagnosed osteoarthritis using Durom Hip Resurfacing System (DHRS). The method is based on selection and application of the resurfacing to the pelvis reconstructed on the basis of computed tomography. Quality and geometrical parameters of distinguished tissues have a fundamental significance for locating and positioning the acetabular and femoral components. The application precedes the measurements of anatomical structures on a complex numerical model. The developed procedure enables functional selection of endo-prosthesis and its positioning in such a way that it secures geometric parameters within the bone bed and the depth , inclination angles and ante-version of the acetabular component, the neck-shaft angle and ante-torsion angle of the neck of the femoral bone, and reconstruction of the biomechanical axis of the limb and the physiological point of rotation in the implanted joint. Proper biomechanics of the bone-joint complex of the lower limb is determined by correlation of anatomicalgeometrical parameters of the acetabular component and parameters of the femoral bone.

Identification of the Cause of the Stem Neck Fracture in the Hip Joint Endoprosthesis

“…The analysed radiogram gives rise to certain doubts regarding the conditions of recreating the rotation axis of the implanted joint [19][20][21]. The rotation centre for the artificial joint is higher than the one for the natural joint.…”