An energy dissipation and cross shear time dependent computational wear model for the analysis of polyethylene wear in total knee replacements.
The cost and time efficiency of computational polyethylene wear simulations may enable the optimization of total knee replacements for the reduction of polyethylene wear. The present study proposes an energy dissipation wear model for polyethylene which considers the time dependent molecular behavior of polyethylene, aspects of tractive rolling and contact pressure. This time dependent - energy dissipation wear model was evaluated, along with several other wear models, by comparison to pin-on-disk results, knee simulator wear test results under various kinematic conditions and knee simulator wear test results that were performed following the ISO 14243-3 standard. The proposed time dependent - energy dissipation wear model resulted in improved accuracy for the prediction of pin-on-disk and knee simulator wear test results compared with several previously published wear models.
University of Manitoba, Winnipeg, MB, Canada; Concordia Joint Replacement Group, Winnipeg, MB, Canada.
Sean T
ST
O'Brien
University of Manitoba, Winnipeg, MB, Canada; Concordia Joint Replacement Group, Winnipeg, MB, Canada.
Eric R
ER
Bohm
Concordia Joint Replacement Group, Winnipeg, MB, Canada; Orthopaedic Innovation Centre, Winnipeg, MB, Canada.
Martin J
MJ
Petrak
University of Manitoba, Winnipeg, MB, Canada; Concordia Joint Replacement Group, Winnipeg, MB, Canada; Orthopaedic Innovation Centre, Winnipeg, MB, Canada.
Urs P
UP
Wyss
University of Manitoba, Winnipeg, MB, Canada; Concordia Joint Replacement Group, Winnipeg, MB, Canada. Electronic address: jbrandt@cjrg.ca.
Jan-M
JM
Brandt
D019645:Arthroplasty, Replacement, Knee; D001696:Biomechanical Phenomena; D003198:Computer Simulation; D006801:Humans; D007719:Knee Joint / Q000502:physiology* / Q000601:surgery; D007720:Knee Prosthesis; D008954:Models, Biological; D020959:Polyethylene / Q000737:chemistry*; D011312:Pressure
D020959:Polyethylene
Computational Simulation; Finite Element; Polyethylene; Total Knee Replacement; Tribology; Wear; Wear Simulation