title: Flexion-extension gaps balanced using navigation assistance in TKA.
abstract: This study evaluated the accuracy of navigation for balancing soft tissue and flexion-extension gaps in primary total knee arthroplasty (TKA). We evaluated 112 knees treated with TKA using the gap technique and navigation system. Flexion-extension gaps were measured before femoral cutting (precutting gaps) and before prosthesis insertion (final gaps). Balanced precutting flexion-extension gaps were shown in 45 cases (40.2%), and balanced final flexion-extension gap was achieved in 105 cases (93.8%). Precutting tight extension gaps resulted from preoperative extension lag. We found TKA using the gap technique with navigation to be an effective means of achieving balanced flexion-extension gaps.
authors.affiliation: Department of Orthopedic Surgery, Chonnam National University Hwasun Hospital, Jeonnam 519-809, Korea.
authors.forename: Eun-Kyoo
authors.initials: EK
authors.lastname: Song
authors.forename: Jong-Keun
authors.initials: JK
authors.lastname: Seon
authors.forename: Sang-Jin
authors.initials: SJ
authors.lastname: Park
mesh_terms: D000368:Aged; D019645:Arthroplasty, Replacement, Knee / Q000295:instrumentation* / Q000379:methods*; D005260:Female; D006801:Humans; D007593:Joint Instability / Q000175:diagnosis* / Q000601:surgery*; D007720:Knee Prosthesis; D008297:Male; D008875:Middle Aged; D016059:Range of Motion, Articular; D025321:Surgery, Computer-Assisted / Q000379:methods*