title: Kinematic analysis of a posterior cruciate retaining mobile-bearing total knee arthroplasty.
abstract: Using video fluoroscopy, 10 subjects having a mobile-bearing posterior cruciate-retaining total knee arthroplasty were analyzed to determine their in vivo kinematic patterns. Under weight-bearing conditions, while in extension, the average contact position was posterior to the mid-tibia sagittal plane with posterior translation of both condyles to 60 degrees of flexion, followed by anterior translation to 120 degrees of flexion. Under non-weight-bearing conditions, the average condylar contact positions were significantly more anterior from full extension to 90 degrees of knee flexion (P=.01). The average range of motion was 129 degrees under non-weight-bearing conditions and 119 degrees during weight-bearing. Although subjects in this study exhibited variable motion patterns, they are accommodated by the unconstrained optimized articulation of this highly conforming mobile-bearing implant.
authors.affiliation: Sport Med SA, Adelaide, Australia.
authors.forename: Roger
authors.initials: R
authors.lastname: Oakeshott
authors.forename: James B
authors.initials: JB
authors.lastname: Stiehl
authors.forename: Richard A
authors.initials: RA
authors.lastname: Komistek
authors.forename: Dylan T
authors.initials: DT
authors.lastname: Anderson
authors.forename: Brian D
authors.initials: BD
authors.lastname: Haas
mesh_terms: D001696:Biomechanical Phenomena; D006801:Humans; D007720:Knee Prosthesis; D011474:Prosthesis Design; D012399:Rotation