title: Wear-simulation analysis of rotating-platform mobile-bearing knees.
abstract: The wear and wear debris from rotating-platform mobile-bearing knees and fixed-bearing knees were compared in knee joint-simulator studies. The wear rate of the fixed-bearing knees was found to increase as the kinematics were increased because of an increase in internal-external rotation and an increase in anterorposterior (AP) translation. The wear rate of the rotating-platform mobile-bearing knees was found to be significantly lower than that of the fixed-bearing knees. The rotating-platform mobile-bearing knee was able to decouple the complex kinematics to pure rotation at the inferior tibial articulating surface and linear flexion-extension and AP sliding at the superior femoral articulating interface, substantially reducing cross-shear and wear. No difference was found in the wear debris between the rotating-platform and fixed-bearing knees. This resulted in a substantially reduced functional biological activity or osteolytic potential for the rotating-platform mobile-bearing knees due to the lower wear rates.
authors.affiliation: Institute of Medical and Biological Engineering, University of Leeds, Leeds, United Kingdom.
authors.forename: John
authors.initials: J
authors.lastname: Fisher
authors.forename: Hannah
authors.initials: H
authors.lastname: McEwen
authors.forename: Joanne
authors.initials: J
authors.lastname: Tipper
authors.forename: Louise
authors.initials: L
authors.lastname: Jennings
authors.forename: Richard
authors.initials: R
authors.lastname: Farrar
authors.forename: Martin
authors.initials: M
authors.lastname: Stone
authors.forename: Eileen
authors.initials: E
authors.lastname: Ingham
mesh_terms: D007720:Knee Prosthesis; D011474:Prosthesis Design; D016059:Range of Motion, Articular