title: The knee adduction moment during gait is associated with the adduction angle measured during computer-assisted total knee arthroplasty.
abstract: Computer-assisted surgery can be used to measure 3-dimensional knee function during arthroplasty surgery; however, it is unknown if the movement of the knee measured during surgery is related to the in vitro, dynamic state of the knee joint, specifically the knee adduction moment during gait, which has been related to implant migration. The purpose of this study was to determine if the preoperative adduction moment is correlated with the knee abduction/adduction angle measured intraoperatively. A statistically significant correlation was found between the mean (r(2) = 0.59; P = .001) and peak (r(2) = 0.53; P = .003) preoperative knee adduction moment and the mean abduction/adduction angle measured intraoperatively. The association found in this study suggests the potential for incorporating functional information that relates to surgical outcome into surgical decision making using computer-assisted surgery.
authors.affiliation: School of Biomedical Engineering, Dalhousie University, Halifax, Nova Scotia, Canada.
authors.forename: Richard D
authors.initials: RD
authors.lastname: Roda
authors.forename: Janie L Astephen
authors.initials: JL
authors.lastname: Wilson
authors.forename: David A J
authors.initials: DA
authors.lastname: Wilson
authors.forename: Glen
authors.initials: G
authors.lastname: Richardson
authors.forename: Michael J
authors.initials: MJ
authors.lastname: Dunbar
mesh_terms: D000368:Aged; D019645:Arthroplasty, Replacement, Knee / Q000379:methods*; D001696:Biomechanical Phenomena; D005684:Gait / Q000502:physiology*; D006801:Humans; D007432:Intraoperative Period; D007719:Knee Joint / Q000502:physiology* / Q000601:surgery; D007720:Knee Prosthesis; D008875:Middle Aged; D020370:Osteoarthritis, Knee / Q000601:surgery*; D057234:Preoperative Period; D011475:Prosthesis Failure; D016059:Range of Motion, Articular / Q000502:physiology*; D012720:Severity of Illness Index; D025321:Surgery, Computer-Assisted / Q000379:methods*; D016896:Treatment Outcome