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. 2020 Aug 12;25(3):1423–1431. doi: 10.1007/s00784-020-03450-x

Fig. 3.

Fig. 3

a, b Total artifact volume (AV; a) and corresponding ratio of artifact volume to retainer volume (AV/RV; b) for all retainers investigated. Twistflex retainers caused the largest artifact volumes and highest AV/RV ratios. Among the CAD/CAM retainers, the largest artifact volumes and highest AV/RV ratios were observed for cobalt–chromium CAD/CAM retainers. Grade-5 titanium and nickel–titanium CAD/CAM retainers resulted in the smallest artifact volumes and lowest AV/RV ratios. CAD/CAM, computer-aided design/computer-aided manufacturing