Influence of Material Selection on the Marginal Accuracy of CAD/CAM-Fabricated Metal- and All-Ceramic Single Crown Copings

BioMed Research International
Matthias RödigerSven Rinke

Abstract

This study evaluated the marginal accuracy of CAD/CAM-fabricated crown copings from four different materials within the same processing route. Twenty stone replicas of a metallic master die (prepared upper premolar) were scanned and divided into two groups. Group 1 (n = 10) was used for a pilot test to determine the design parameters for best marginal accuracy. Group 2 (n = 10) was used to fabricate 10 specimens from the following materials with one identical CAD/CAM system (GAMMA 202, Wissner GmbH, Goettingen, Germany): A = commercially pure (cp) titanium, B = cobalt-chromium alloy, C = yttria-stabilized zirconia (YSZ), and D = leucite-reinforced glass-ceramics. Copings from group 2 were evaluated for the mean marginal gap size (MeanMG) and average maximum marginal gap size (AMaxMG) with a light microscope in the "as-machined" state. The effect of the material on the marginal accuracy was analyzed by multiple pairwise comparisons (Mann-Whitney, U-test, α = 0.05, adjusted by Bonferroni-Holmes method). MeanMG values were as follows: A: 46.92 ± 23.12 μm, B: 48.37 ± 29.72 μm, C: 68.25 ± 28.54 μm, and D: 58.73 ± 21.15 μm. The differences in the MeanMG values proved to be significant for groups A/C (p = 0.0024), A/D (p = 0.008), and...Continue Reading

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Citations

Mar 29, 2020·International Journal of Environmental Research and Public Health·Maximiliane Amelie SchlenzBernd Wöstmann
Feb 6, 2020·Biomaterial Investigations in Dentistry·Per Svanborg
Jun 19, 2020·International Journal of Environmental Research and Public Health·Roberto PadrósFrancisco Javier Gil
Feb 17, 2019·International Journal of Environmental Research and Public Health·Francesco FerriniEnrico Felice Gherlone
Apr 23, 2021·Dental Materials Journal·Masateru AnzaiKatsuhiko Kimoto
Jun 4, 2021·Dental Materials Journal·Laila Azwa Hassan, Chui Ling Goo

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