Impact of two toothpastes on repairing enamel erosion produced by a soft drink: An AFM in vitro study

Objectives The aim of the present in vitro study was the evaluation of two toothpastes (Sensodyne Pronamel and Biorepair Plus on repairing enamel erosion produced by a soft drink (Coca Cola), using Atomic Force Microscopy (AFM) Methods Fifty extracted human central incisors free of canes were selected and divided in a treatment and a control half they were kept in artificial saliva during whole experimentation The treatment halves were divided into five groups group 1 demineralization with soft drink group 2 demineralization with soft drink + Pronamel group 3 demineralization with soft drink + Biorepair Plus group 4 intact enamel + Pronamel group 5 intact enamel + Biorepair Plus Specimen demineralization was carried on in 4 intervals of 2 mm In groups 2, 3 4 and 5 the toothpastes were applied for 3 mm at 0 8 24 and 36 h The surface of each specimen was imaged by AFM and R-rms root mean square roughness and Maximum Depth of the cavities were registered Results Amongst treatment specimens of groups 1 2 and 3 a statistically significant difference (P < 0 01) in R-rms and Maximum Depth values was registered the toothpastes reduced enamel demineralization No statistical differences in R-rms values were registered between the two toothpastes Conclusions The toothpastes tested (Pronamel and BioRepair Plus) offer a degree of protection from erosive drinks (C) 2010 Elsevier Ltd All rights reserved