title: Alignment changes due to incomplete component seating in total knee arthroplasty.
abstract: Mechanical axis restoration remains a primary goal of total knee arthroplasty. Incomplete asymmetrical component seating, through intended or unintended alterations in surgical technique, changes the component alignment and, thus, the overall mechanical axis. Using a trigonometric analysis, it was determined that incomplete seating of 1 to 5 mm can alter the coronal alignment by 0.7° to 4.9°, depending on the amount of asymmetry as well as the size of the femoral or tibial component. This analysis quantifies the degree of changes surgeons should expect when incomplete component seating is encountered intraoperatively.
authors.affiliation: Department of Orthopaedic Surgery, Lenox Hill Hospital, William Black Hall, 130 East 77th St, New York, NY 10075, USA.
authors.forename: H John
authors.initials: HJ
authors.lastname: Cooper
mesh_terms: D019645:Arthroplasty, Replacement, Knee / Q000295:instrumentation*; D001696:Biomechanical Phenomena; D017760:Bone Malalignment / Q000209:etiology*; D005269:Femur / Q000601:surgery; D006801:Humans; D007720:Knee Prosthesis / Q000009:adverse effects*; D008432:Mathematical Computing; D013977:Tibia / Q000601:surgery