Comparison of in vivo contact positions for PS and PCR TKA implants using Lowest Point and full-contact techniques
by Saikat Pal, Mohamed R. Mahfouz, Richard D. Komistek, Paul J. Rullkoetter
International Journal of Biomedical Engineering and Technology (IJBET), Vol. 5, No. 2/3, 2011

Abstract: Evaluation of in vivo tibiofemoral contact following total knee arthroplasty provides valuable feedback to clinicians and researchers. The objective of the present study was to evaluate in vivo contact positions using a combination of fluoroscopy and Finite Element (FE) modelling. Center-of-Pressure (COP) contact locations from FE models were compared to Lowest Point (LP) results. Six P.F.C^® Sigma Posterior Stabilised (PS) and 6 P.F.C^® Sigma Posterior Cruciate Retraining (PCR) implants were analysed during weight-bearing knee flexion from 0° to 90°. Statistically significant differences were observed between the means of anterior-posterior contact position from the LP and COP methods (α = 0.05).

Online publication date: Wed, 21-Jan-2015

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