Authors: William M Mihalko Devin J Conner Rodney Benner John L Williams
Publish Date: 2011/10/27
Volume: 470, Issue: 1, Pages: 186-192
Abstract
We utilized a computer model LifeMOD™/KneeSIM LifeModeler Inc San Clemente CA USA to show variability in polyethylene contact patterns We imported components of a cruciateretaining TKA into the model and subjected the systems to a simulated lunge We modeled five different combinations of implant positioning in the transverse plane of both the femoral and tibial components in internal or external rotation and compared the resulting changes in joint rotations and displacements of these five variations to those for published fluorokinematic observations using the same modeled lungetype maneuver for five patientsWe observed variations in AP translation of the lateral and medial femoral condyles resembling several of those in the literature for individual patients with the same cruciateretaining knee implant The largest AP translational changes were seen with the tibia internally rotated 5° Using the five different implant transverse plane alignment scenarios resulted in a coefficient of determination of 06 for the linear regression when compared to five subjects from a published fluorokinematic studyOne or more of the authors WMM JLW has received funding from Corin Ltd Cirencester UK and Aesculap Inc Center Valley PA USA WMM has a consultancy and royalty agreement with Aesculap Inc One author JLW has received software licenses from LifeModeler Inc San Clemente CA USA
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