title: Tibiofemoral Rotation During Sit-to-Stand Activity After TKA.
abstract: The objective of this study was to describe how tibiofemoral internal/external rotation varies in patients after total knee arthroplasty (TKA) when compared with control participants during a sit-to-stand (STS) maneuver. Motion analysis was used to measure internal/external knee rotation during STS in the control and TKA groups. Fourteen participants were included in the study. Six patients with 7 TKA knees (6 posterior stabilized and 1 cruciate-retaining TKA) were compared with 8 control participants with 8 knees from the current authors' laboratory database. Participants performed 3 STS maneuvers, and the average internal/external rotation of the femur with respect to the tibia was compared. All control participants and 2 TKA participants had internal rotation of the femur with respect to the tibia, whereas 4 TKA participants had external rotation, and 1 had no rotation during STS. Further investigation into the surgical and patient- and implant-related factors that affect this resulting reverse kinematic profile seems to be warranted. [Orthopedics. 2016; 39(3):S41-S44.].
authors.forename: Brooke A
authors.initials: BA
authors.lastname: Sanford
authors.forename: John L
authors.initials: JL
authors.lastname: Williams
authors.forename: Kyle D
authors.initials: KD
authors.lastname: Huffman
authors.forename: Audrey R
authors.initials: AR
authors.lastname: Zucker-Levin
authors.forename: William M
authors.initials: WM
authors.lastname: Mihalko
mesh_terms: D000368:Aged; D019645:Arthroplasty, Replacement, Knee; D001696:Biomechanical Phenomena; D005260:Female; D005269:Femur / Q000503:physiopathology / Q000601:surgery*; D006801:Humans; D007592:Joint Diseases / Q000503:physiopathology / Q000601:surgery*; D007719:Knee Joint / Q000503:physiopathology / Q000601:surgery*; D008297:Male; D008875:Middle Aged; D011187:Posture / Q000502:physiology*; D016059:Range of Motion, Articular; D012399:Rotation; D013977:Tibia / Q000503:physiopathology / Q000601:surgery*