title: Computer navigation results in less severe flexion contracture following total knee arthroplasty.
abstract: We compared postoperative flexion contracture in navigated total knee arthroplasty (TKA) versus conventional TKA. Two groups (Group 1: conventional, Group 2: navigated) of 235 consecutive patients matched for age and gender were retrospectively compared. Range of motion, mechanical axes, Knee Society Scores, Oxford Knee Scores and Short Form-36® (SF-36) scores were collected prospectively and compared preoperatively and at 2years following TKA. At 2years, patients who underwent navigated TKA averaged significantly lesser flexion contracture of 1 degree compared to 6 degrees in patients who underwent conventional TKA. There were a significantly larger proportion of outliers in the conventional group. Computer navigation results in less severe flexion contracture and less frequent flexion contracture of more than 5 degrees as compared to conventional techniques.
authors.affiliation: Department of Orthopaedic Surgery, Singapore General Hospital, Singapore, Singapore.
authors.forename: Hamid Rahmatullah
authors.initials: HR
authors.lastname: Bin Abd Razak
authors.affiliation: Department of Orthopaedic Surgery, Singapore General Hospital, Singapore, Singapore.
authors.forename: Seng
authors.initials: S
authors.lastname: Yeo Jin
authors.affiliation: Department of Physiotherapy, Singapore General Hospital, Singapore, Singapore.
authors.forename: Hwei
authors.initials: H
authors.lastname: Chong Chi
mesh_terms: D000368:Aged; D019645:Arthroplasty, Replacement, Knee / Q000009:adverse effects*; D003286:Contracture / Q000209:etiology*; D005260:Female; D006801:Humans; D007719:Knee Joint / Q000601:surgery*; D008297:Male; D008875:Middle Aged; D020370:Osteoarthritis, Knee / Q000601:surgery*; D016059:Range of Motion, Articular; D012189:Retrospective Studies; D025321:Surgery, Computer-Assisted
keywords: CAS; computer navigation; flexion contracture; outcomes