title: Comparison of two commercial patellofemoral prostheses by means of computational modeling.
abstract: There are many patellofemoral prostheses designs available for patellofemoral resurfacing, but few studies provide results objectively comparing these designs. In this study two designs are compared on the basis of patella kinematics and patellofemoral kinetics by means of a computational technique. Results indicated that the patellae displaced laterally after trochlear engagement, while tilt patterns were irregular between volunteers. Patellofemoral contact loads increased with knee flexion, whereas medial patellofemoral tension diminished. The results from three volunteer-specific models showed that Prosthesis B would reproduce similar patella kinematics and patellofemoral kinetics to the baseline models. The computational technique provided a means by which prostheses designs could be compared with similar input and boundary values.
authors.affiliation: Department of Mechanical and Mechatronic Engineering, Stellenbosch University, South Africa. cobusmul@sun.ac.za
authors.forename: Jacobus H
authors.initials: JH
authors.lastname: Muller
authors.forename: Cornie
authors.initials: C
authors.lastname: Scheffer
authors.forename: Pieter J
authors.initials: PJ
authors.lastname: Erasmus
authors.forename: Edwin M
authors.initials: EM
authors.lastname: Dillon
authors.forename: Alex
authors.initials: A
authors.lastname: Elvin
mesh_terms: D000328:Adult; D001186:Artificial Limbs; D001696:Biomechanical Phenomena / Q000502:physiology; D003198:Computer Simulation; D005260:Female; D006801:Humans; D007700:Kinetics; D008022:Ligaments / Q000033:anatomy & histology / Q000502:physiology; D008297:Male; D057071:Patellofemoral Joint / Q000502:physiology*; D013710:Tendons / Q000033:anatomy & histology / Q000502:physiology