title: Navigation-assisted less invasive total knee arthroplasty compared with conventional total knee arthroplasty: a randomized prospective trial.
abstract: The purpose of this study was to evaluate the hypothesis that a less invasive (LIS) surgical technique using a navigation system would promote rapid recovery and improve alignment compared with conventional technique in total knee arthroplasty (TKA). This study compared 49 navigation-assisted LIS TKAs with 53 conventionally performed TKAs using a medial parapatellar arthrotomy with patellar eversion. Navigation-assisted LIS TKA used a shorter skin incision, a midvastus approach without patella eversion, and a navigation system. Navigation-assisted LIS TKA had better pain scores, shorter times to achieve 90 degrees flexion and straight leg raise, and a smaller extension lag during the very early postoperative period. However, there were no differences between the groups 2 weeks postoperatively. There were no differences in mean prosthetic alignment between the 2 groups, but the navigation-assisted LIS group had fewer "outliers" than the conventionally performed TKA group.
authors.affiliation: Department of Orthopedics, Center for Joint Disease, Chonnam National University Hwasun Hospital, Jeonnam, Korea.
authors.forename: Jong Keun
authors.initials: JK
authors.lastname: Seon
authors.forename: Eun Kyoo
authors.initials: EK
authors.lastname: Song
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D019645:Arthroplasty, Replacement, Knee / Q000379:methods*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D019060:Minimally Invasive Surgical Procedures; D010147:Pain Measurement; D010329:Patella / Q000601:surgery; D011446:Prospective Studies; D016059:Range of Motion, Articular; D020127:Recovery of Function; D018709:Statistics, Nonparametric; D025321:Surgery, Computer-Assisted; D016896:Treatment Outcome