Dentifrice abrasiveness on microfill composite resin and dentin: a comparative study.

This in vitro study evaluated the abrasiveness of seven dentifrices on microfill composite resin discs and dentin surfaces. The composite resin discs and dentin surfaces were brushed in groups using slurries of the different dentifrices. Each specimen was subjected to 2400 strokes using medium bristle toothbrushes at a brush tension of 150 g. Any changes in surface roughness were noted through the use of a mechanical profiler or profileometer and scanning electron micrographs. The results of this study have indicated that Rembrandt Whitening Toothpaste was significantly less abrasive to the microfill composite discs and dentin surfaces compared to the other dentifrices tested (p < .05, ANOVA). Further clinical studies may be warranted to test the abrasiveness of dentifrices, especially if they are used over extended periods of time.