title: The influence of the posterior cruciate ligament and component design on joint line position after primary total knee arthroplasty.
abstract: This study investigated the change in joint line position after posterior cruciate-retaining and posterior-stabilized total knee arthroplasty with AMK (DePuy, Warsaw, Ind) and Genesis II (Smith & Nephew, Memphis, Tenn) components. A total of 200 primary total knee arthroplasty patients were randomly selected so as to have 50 patients with each of the 4 prosthesis types. Joint line position was measured on preoperative and 2 year postoperative radiographs by both a lateral and an anteroposterior measurement method. Two-year follow-up functional data were assessed. There were no statistically significant differences in the joint line elevation between posterior-stabilized and posterior cruciate-retaining designs within the same implant system as measured on lateral radiographs. There were no differences in clinical functional outcomes in patients with variable joint line elevation.
authors.affiliation: London Health Sciences Centre, University Hospital, London, Ontario, Canada.
authors.forename: Matthew G
authors.initials: MG
authors.lastname: Snider
authors.forename: Steven J
authors.initials: SJ
authors.lastname: Macdonald
mesh_terms: D019645:Arthroplasty, Replacement, Knee / Q000295:instrumentation* / Q000379:methods*; D017760:Bone Malalignment / Q000000981:diagnostic imaging / Q000517:prevention & control; D005500:Follow-Up Studies; D006801:Humans; D007719:Knee Joint / Q000000981:diagnostic imaging* / Q000502:physiology / Q000601:surgery*; D007720:Knee Prosthesis; D016119:Posterior Cruciate Ligament / Q000601:surgery*; D011474:Prosthesis Design; D011859:Radiography; D016059:Range of Motion, Articular / Q000502:physiology; D016896:Treatment Outcome