title: Clinical and radiographic outcomes of image-based computer-assisted total knee arthroplasty: an evidence-based evaluation.
abstract: Conventional instrumentation systems have limited accuracy in determining the crucial landmarks needed for alignment in total knee arthroplasty (TKA). Given this, the image-based navigation system was introduced to improve the accuracy of implantation of components into the femur and tibia. PubMed, EMBASE, Web of Science, and Evidence-Based Medicine databases were electronically searched to identify eligible studies published until October 2008. A systematic review and meta-analysis of 6 randomized/quasi-randomized controlled trials that compared image-based navigation and conventional techniques was conducted. The operative time was longer in the navigation group in 3 studies. Moreover, there was a higher rate of achieving mechanical leg axis within the range of 3° deviation in patients undergoing navigated TKA. However, all studies between the 2 groups were similar in range of motion, knee scores, and postoperative complication rates at the last follow-up. Overall, these short-term follow-up trials show that there were similar early clinical outcomes between image-based navigation and conventional techniques.
authors.affiliation: Department of Orthopaedic Surgery, Shanghai Sixth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China.
authors.forename: Tao
authors.initials: T
authors.lastname: Cheng
authors.forename: Gouyou
authors.initials: G
authors.lastname: Zhang
authors.forename: Xianlong
authors.initials: X
authors.lastname: Zhang
mesh_terms: D019645:Arthroplasty, Replacement, Knee; D019317:Evidence-Based Medicine; D006801:Humans; D007592:Joint Diseases / Q000000981:diagnostic imaging* / Q000503:physiopathology / Q000601:surgery*; D011859:Radiography; D020127:Recovery of Function; D025321:Surgery, Computer-Assisted; D016896:Treatment Outcome