Biomechanical study using polyurethane bone surrogates to test how glenoid baseplate tilt angle (15° superior, 0° neutral, 15° inferior) affects force distribution and micromotion at the bone-implant interface in the Reverse shoulder prosthesis (Encore Medical) during simulated humeral abduction.
When implanting a reverse shoulder prosthesis, target approximately 15° of inferior glenoid baseplate tilt: this single positioning decision shifts loading from tensile/shear to uniform compression, keeps micromotion below the bony ingrowth threshold, and directly addresses the primary failure mode of glenoid component loosening.
Biomechanical study using polyurethane bone surrogates to test how glenoid baseplate tilt angle (15° superior, 0° neutral, 15° inferior) affects force distribution and micromotion at the bone-implant interface in the Reverse shoulder prosthesis (Encore Medical) during simulated humeral abduction.
When implanting a reverse shoulder prosthesis, target approximately 15° of inferior glenoid baseplate tilt: this single positioning decision shifts loading from tensile/shear to uniform compression, keeps micromotion below the bony ingrowth threshold, and directly addresses the primary failure mode of glenoid component loosening.