Abstract
Objective
This five-phase, single-blind, crossover in situ trial evaluated the effects of desensitizing or anti-erosive toothpastes on dentin erosive wear and tubule occlusion.
Materials and methods
Some characteristics such as relative dentin abrasivity (RDA), viscosity (V), cytotoxicity, and fluoride and calcium (Ca) availability of the toothpastes were also tested. Samples were positioned on removable intraoral appliances from 15 volunteers (n=4), according to the groups, C-control (0 ppm fluoride), F-sodium monofluorophosphate (MFP), A-MFP and arginine+calcium carbonate, CSP-calcium sodium phosphosilicate, and CS-MFP and calcium silicate+sodium phosphate. Erosion-abrasion cycling was performed (1% citric acid, 2min, 6×/day; toothbrushing, 5s, 2×/day). Surface loss (SL) was evaluated by optical profilometry. Environmental scanning electron microscopy images (ESEM) counted the number of open dentin tubules (ODTs). Data were statistically analyzed (α=0.05).
Results
There were no significant differences in SL among groups (p=0.468). The ODT for CSP, CS, and A groups were significantly lower than the control. CSP and CS presented significantly less ODT than F, but they did not significantly differ from A. F and CS were more abrasive than all the other toothpastes; CSP was more abrasive than A, and C was the least abrasive. CSP presented higher V (p<0.05). All toothpastes presented lower cell viability than the control without toothpaste exposure. F and A presented significantly higher values of F- (p<0.05). All fluoride toothpastes had similar amount of Ca, differing from the control (p<0.05).
Conclusion
Although the toothpastes caused similar degree of erosive wear, CSP and CS were able to occlude the dentin tubules.
Clinical relevance
Desensitizing toothpastes containing calcium, sodium, phosphate, and silicate could be a suitable option for treating dentin hypersensitivity.
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Change history
31 May 2021
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Acknowledgements
We would like to thank the State of São Paulo Research Foundation (FAPESP) for the scholarship awarded to the first author (Grant #2015/15629-7) and Prof. Anderson Hara for the RDA test performed at the Oral Health Research Institute, Indiana University School of dentistry. The funder had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.
Funding
The work was supported by the State of São Paulo Research Foundation (FAPESP) Grant #2015/15629-7.
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Conceived and designed the experiments: RL, TS, SF, and AC
Performed the experiments: RL
Analyzed the data: TS, RL
Wrote the paper: RL, TS, SF, and AC
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Lopes, R.M., Scaramucci, T., Walker, C.L. et al. In situ evaluation of desensitizing toothpastes for protecting against erosive tooth wear and its characterization. Clin Oral Invest 25, 6857–6870 (2021). https://doi.org/10.1007/s00784-021-03975-9
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DOI: https://doi.org/10.1007/s00784-021-03975-9