Journal: Materials
Article Title: Influences of Different CAD/CAM Ceramic Compositions and Thicknesses on the Mechanical Properties of Ceramic Restorations: An In Vitro Study
doi: 10.3390/ma16020646
Figure Lengend Snippet: Mean surface roughness (Ra1) of the four study groups before toothbrushing. * Statistically significant at p value < 0.05. a , b , c : Different lowercase letters denote statistically significant differences between the four groups using the Bonferroni-adjusted significance level.
Article Snippet: The specimens were placed in a putty index holder and subjected to a toothbrushing procedure (T1) using the toothbrushing simulation machine (model ZM-3.8; SD Mechatronik GmbH, Feldkirchen-Westerham, Germany) for 40,000 strokes, where 75 strokes were applied for each 60 s using a toothbrush (Colgate Twister, Colgate-Palmolive, São Paulo, SP, Brazil), with a total duration of 4 h and 44 min and a load of 0.2 Newtons [ ].
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