Fig. 6From: Novel implant design of the proximal interphalangeal joint using an optimized rolling contact joint mechanismLocations of the average centers of rotation (ACRs) obtained in three participants. The “x” marks appearing in the proximal and middle phalanges represent the ACRs of the respective finger. a ACRs of participant 1. b ACRs of participant 3. c ACRs of participant 8Back to article page