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Meta-Analysis
. 2011 Mar;35(3):331-9.
doi: 10.1007/s00264-010-1008-6. Epub 2010 Apr 8.

Imageless computer assisted versus conventional total knee replacement. A Bayesian meta-analysis of 23 comparative studies

Yaron S Brin  1 , Vassilios S Nikolaou, Lawrence Joseph, David J Zukor, John Antoniou
Affiliations
Meta-Analysis

Imageless computer assisted versus conventional total knee replacement. A Bayesian meta-analysis of 23 comparative studies

Yaron S Brin et al. Int Orthop. 2011 Mar.

Abstract

We have undertaken a meta-analysis of the English literature, to assess the component alignment outcomes after imageless computer assisted (CAOS) total knee arthroplasty (TKA) versus conventional TKA. We reviewed 23 publications that met the inclusion criteria. Results were summarised via a Bayesian hierarchical random effects meta-analysis model. Separate analyses were conducted for prospective randomised trials alone, as well as for all randomised and observational studies. In 20 papers (4,199 TKAs) we found a reduction in outliers rate of approximately 80% in limb mechanical axis when operated with the CAOS. For the coronal femoral and tibial implants positions, the analysis included 3,058 TKAs. The analysis for the femoral implant showed a reduction in outliers rate of approximately 87% and for the tibial implant a reduction in outliers rate of approximately 80%. Imageless navigation when performing TKA improves component orientation and postoperative limb alignment. The clinical significance of these findings though has to be proven in the future.

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Figures

Fig. 1
Fig. 1
Mechanical axis diagram for prospective randomised studies alone
Fig. 2
Fig. 2
Mechanical axis diagram for prospective randomised and retrospective studies
Fig. 3
Fig. 3
Femoral angle diagram for prospective randomised and retrospective studies
Fig. 4
Fig. 4
Tibial angle diagram for prospective randomized and retrospective studies
See this image and copyright information in PMC

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