All-polyethylene tibial components generate higher stress and micromotions than metal-backed tibial components in total knee arthroplasty

Abstract

The metal-backed design showed better biomechanical performance during a squat activity at 120° of flexion compared to the all-polyethylene design. These results should be considered when selecting the appropriate tibial component for a patient, especially in the presence of osteoporotic bone or if intense physical activity is foreseen.