In vivo contact kinematics and contact forces of the knee after total knee arthroplasty during dynamic weight-bearing activities.

ABSTRACT: Analysis of polyethylene component wear and implant loosening in total knee arthroplasty (TKA) requires precise knowledge of in vivo articular motion and loading conditions. This study presents a simultaneous in vivo measurement of tibiofemoral articular contact forces and contact kinematics in three TKA patients. These measurements were accomplished via a dual fluoroscopic imaging system and instrumented tibial implants, during dynamic single leg lunge and chair rising-sitting. The measured forces and contact locations were also used to determine mediolateral distribution of axial contact forces. Contact kinematics data showed a medial pivot during flexion of the knee, for all patients in the study. Average axial forces were higher for lunge compared to chair rising-sitting (224% vs. 187%

SUBMITTER: Varadarajan KM 

PROVIDER: S-EPMC3177238 | biostudies-literature | 2008 Jul

REPOSITORIES: biostudies-literature