title: Kinematic differences between gender specific and traditional knee implants.
abstract: In the ongoing debate about gender-specific (GS) vs. traditional knee implants, there is limited information about patella-specific outcomes. GS femoral component features should provide better patellar tracking, but techniques have not existed previously to test this accurately. Using novel computed tomography and radiography imaging protocols, 15 GS knees were compared to 10 traditional knees, for the 6 degrees of freedom of the patellofemoral and tibiofemoral joints throughout the range of motion, plus other geometric measures and quality of life (QOL). Significant differences were found for patellar medial/lateral shift, where the patella was shifted more laterally for the GS femoral component. Neither group demonstrated patellar maltracking. There were no other significant differences in this well-functioning group.
authors.affiliation: Biomedical Engineering and the McCaig Institute for Bone and Joint Health, University of Calgary, Canada.
authors.forename: Stefan K
authors.initials: SK
authors.lastname: Saevarsson
authors.forename: Gulshan B
authors.initials: GB
authors.lastname: Sharma
authors.forename: Heiko
authors.initials: H
authors.lastname: Ramm
authors.forename: Robert
authors.initials: R
authors.lastname: Lieck
authors.forename: Carol R
authors.initials: CR
authors.lastname: Hutchison
authors.forename: Jason
authors.initials: J
authors.lastname: Werle
authors.forename: Sigrun
authors.initials: S
authors.lastname: Matthiasdottir
authors.forename: Spencer J
authors.initials: SJ
authors.lastname: Montgomery
authors.forename: Carolina I
authors.initials: CI
authors.lastname: Romeo
authors.forename: Stefan
authors.initials: S
authors.lastname: Zachow
authors.forename: Carolyn
authors.initials: C
authors.lastname: Anglin
mesh_terms: D000368:Aged; D019645:Arthroplasty, Replacement, Knee; D001696:Biomechanical Phenomena; D005260:Female; D006801:Humans; D021621:Imaging, Three-Dimensional; D007719:Knee Joint / Q000033:anatomy & histology / Q000000981:diagnostic imaging / Q000503:physiopathology* / Q000601:surgery*; D007720:Knee Prosthesis; D008297:Male; D008875:Middle Aged; D011474:Prosthesis Design; D011859:Radiography; D012737:Sex Factors
keywords: gender specific implants; imaging; kinematics; patella; prosthesis design; total knee arthroplasty