TODENTJ-25-03-2019_TODENTJ-7-132 1553505482 Bentham Open doi@benthamopen.net Bentham Open The Open Dentistry Journal TODENTJ 1874-2106 9 30 2013 7 1 Meire Coelho Ferreira Maria Letícia Ramos-Jorge Alberto Carlos Botazzo Delbem Ricardo de Sousa Vieirac The aim of the present study was to investigate the abrasive effect of CaCO3 and SiO2-based fluoride-free experimental toothpastes on eroded human permanent dental enamel and evaluate the effectiveness of waiting periods between acid exposure and tooth brushing. Twelve volunteers wore palatal appliances containing human enamel blocks for two periods of five days each. The appliances were immersed in a soft drink for five minutes four times a day (9:00 am, 11:00 am, 2:00 pm and 4:00 pm). On two occasions, two blocks were not submitted to additional treatment; two blocks were brushed (30 s) either with a CaCO3 or SiO2 toothpaste immediately after erosion and two blocks were brushed 1 h after erosion. Thus, the sample was divided into six groups: erosion alone (CaCO3 and SiO2 control); brushing with fluoride-free toothpaste (CaCO3 immediate and 1 h after erosion; SiO2 immediate and 1 h after erosion). Significant differences in wear depth were found between the enamel blocks in the CaCO3 immediate and 1 h after erosion groups and the blocks in the CaCO3 control group (p=0.001; p=0.022). No significant differences were found regarding the change in roughness and wear depth between blocks submitted to immediate abrasion and 1 h after erosion (CaCO3 and SiO2). The data revealed that surface roughness and wear depth is increased when erosion is combined with dental abrasion, regardless of the abrasive used. Waiting for 1 h to brush the eroded blocks offered no protective effect. 9 30 2013 132 139 TODENTJ-7-132 1 10.2174/crossmark_policy opendentistryjournal.com benthamopen.com true Peer Reviewed Single blind Checked with iThenticate 2013-3-31 2013-6-7 2013-6-19 2013-9-30 http://creativecommons.org/licenses/by-nc/3.0/ 10.2174/1874210601307010132 1553505482 https://opendentistryjournal.com/VOLUME/7/PAGE/132/ https://opendentistryjournal.com/contents/volumes/V7/TODENTJ-7-132/TODENTJ-7-132.pdf https://opendentistryjournal.com/contents/volumes/V7/TODENTJ-7-132/TODENTJ-7-132.pdf https://opendentistryjournal.com/contents/volumes/V7/TODENTJ-7-132/TODENTJ-7-132.pdf https://opendentistryjournal.com/contents/volumes/V7/TODENTJ-7-132/TODENTJ-7-132.pdf https://opendentistryjournal.com/contents/volumes/V7/TODENTJ-7-132/TODENTJ-7-132.pdf https://opendentistryjournal.com/contents/volumes/V7/TODENTJ-7-132/TODENTJ-7-132.pdf https://opendentistryjournal.com/contents/volumes/V7/TODENTJ-7-132/TODENTJ-7-132.pdf https://opendentistryjournal.com/contents/volumes/V7/TODENTJ-7-132/TODENTJ-7-132.xml Caries Res Attin T 35 216 2001 Attin T, Knöfel S, Buchalla W, T?t?nc? 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