J Knee Surg 2014; 27(03): 235-248
DOI: 10.1055/s-0033-1360659
Original Article
Thieme Medical Publishers 333 Seventh Avenue, New York, NY 10001, USA.

Navigated versus Conventional Total Knee Arthroplasty

Joseph T. Moskal
1   Department of Orthopaedic Surgery, Virginia Tech Carilion School of Medicine, Roanoke, Virginia
,
Susan G. Capps
2   BENSOL, Warsaw, Indiana
,
John W. Mann
3   Department of Orthopaedic Surgery, Carilion Clinic Orthopaedics, Roanoke, Virginia
,
John A. Scanelli
4   Department of Orthopaedic Surgery, University of Virginia, Charlottesville, Virginia
› Author Affiliations
Further Information

Publication History

23 February 2013

23 September 2013

Publication Date:
14 November 2013 (online)

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Abstract

Computer-aided navigation in total knee arthroplasty (TKA) promises improved alignment, performance, and survivorship. Previous meta-analyses demonstrated that navigation yields better component alignment; however, they did not discuss other indicators of performance. This meta-analysis compares navigated (NAV) and conventional (CONV) TKAs and includes clinical outcomes and adverse events. Forty-seven studies (22 randomized trials) of varying methodological quality involving 7,151 TKAs created the sample population. Statistical analyses included analysis of variance of weighted means and random effects modeling. As seen in previous meta-analyses, NAV is favored over CONV TKA. Analysis of surgical characteristics found that length of surgery and tourniquet times were lower for CONV, but not significant. Meta-analysis found that tourniquet times favored CONV but not a strong relationship for length of surgery. Analysis of individual adverse events did not reveal any significant differences. However, when examining adverse events in their totality, the NAV experienced significantly fewer complications. TKA performed with imageless navigation improves component alignment, provides for lower blood loss, improves clinical outcomes as measured by Knee Society and WOMAC scores, and has fewer total adverse events. Published data are insufficient to determine any correlations between component alignment and outcomes.