title: Comparison of kinematics in the healthy and ACL injured knee using MRI.
abstract: Magnetic Resonance Imaging (MRI) was used to examine the characteristics of abnormal motion in the injured knee by mapping tibiofemoral contact. Eleven healthy subjects and 20 subjects with a unilateral ACL injury performed a leg-press against resistance. MRI scans of both knees at 15 degrees intervals from 0 degrees to 90 degrees of flexion were used to record the tibiofemoral contact pattern. The tibiofemoral contact pattern of the injured knees was more posterior on the tibial plateau than the healthy knees, particularly in the lateral compartment. The tibiofemoral contact pattern of the loaded knees did not differ from the unloaded knees. The difference in the tibiofemoral contact pattern in the ACL injured knee was associated with more severe knee symptoms, irrespective of the passive anterior laxity of the knee.
authors.affiliation: Trauma and Orthopaedic Research Unit, 12A The Canberra Hospital, Yamba Drive, Garran ACT 2605, Australia. jennie.scarvell@act.gov.au
authors.forename: Jennifer M
authors.initials: JM
authors.lastname: Scarvell
authors.forename: Paul N
authors.initials: PN
authors.lastname: Smith
authors.forename: Kathryn M
authors.initials: KM
authors.lastname: Refshauge
authors.forename: Howard
authors.initials: H
authors.lastname: Galloway
authors.forename: Kevin
authors.initials: K
authors.lastname: Woods
mesh_terms: D000328:Adult; D016118:Anterior Cruciate Ligament / Q000503:physiopathology*; D000070598:Anterior Cruciate Ligament Injuries; D001696:Biomechanical Phenomena / Q000379:methods; D003198:Computer Simulation; D005260:Female; D006801:Humans; D007090:Image Interpretation, Computer-Assisted / Q000379:methods*; D007593:Joint Instability / Q000503:physiopathology; D007718:Knee Injuries / Q000503:physiopathology*; D007719:Knee Joint / Q000503:physiopathology*; D008279:Magnetic Resonance Imaging / Q000379:methods; D008297:Male; D008875:Middle Aged; D008954:Models, Biological; D009068:Movement; D011187:Posture; D016059:Range of Motion, Articular; D016474:Weight-Bearing