In vivo estimation of wear in total hip and knee arthroplasty

This seminar presents how an index of wear can be computed from motion analysis data, combining estimated/measured slip velocity and contact forces. Different datasets with bi-pane fluoroscopy or X-ray, instrumented implants, and clinical gait analysis with musculoskeletal modeling are analyzed. This index of wear is used to investigate the effect of the implant design (total hip arthroplasty with single or double mobility, total knee arthroplasty with or without cruciate retaining) and of the activity (gait, sit to stand…).