A novel method to measure rim deformation in UHMWPE acetabular liners

Fluoroscopy studies of total hip replacement (THR) have shown that the femoral head and acetabular cup can separate in vivo, causing edge loading on the rim of the cup [1 –3]. It is thought that this may be caused by sub-optimal component positioning, such as a steeply inclined cup or unmatched centres of rotation of the head and cup, or by joint laxity or lever-out following femoral neck impingement [4–8]. Pre-clinical testing of THR involves ISO standard motion and loading parameters that are representative of a standard walking gait [9].
Source: Medical Engineering and Physics - Category: Biomedical Engineering Authors: Tags: Technical note Source Type: research