Geometric analysis and clinical outcome of two cemented stems for primary total hip replacement with and without modular necks.

Introduction: Restoration of the physiological biomechanical principles of the hip is crucial in total hip replacement. The aim of this study was to compare an arthroplasty system with different offset options (a: Exeter) with a dual-modular stem (b: Profemur Xm).

Materials And Methods: A local and an inertial coordinate system were used to assist the description of the components' assembly in the prosthesis.