Preventive effect of a high fluoride toothpaste and arginine-carbonate toothpaste on dentinal tubules exposure followed by acid challenge: a dentine permeability evaluation

Shelon Cristina Souza Pinto, Matheus Coelho Bandéca, Michele Carolina Pinheiro, Rodrigo Cavassim, Mateus Rodrigues Tonetto, Alvaro Henrique Borges, José Eduardo Cezar Sampaio, Shelon Cristina Souza Pinto, Matheus Coelho Bandéca, Michele Carolina Pinheiro, Rodrigo Cavassim, Mateus Rodrigues Tonetto, Alvaro Henrique Borges, José Eduardo Cezar Sampaio

Abstract

Background: Considering the current high use of high fluoride toothpastes, the aim of the study was to quantify alterations in the root dentine permeability submitted to treatment with a high fluoride toothpaste and 8% arginine, calcium carbonate, sodium monofluorophosphate toothpaste as a preventive treatment for dentinal tubules exposure followed by acid challenge.

Methods: Thirty-third molars were sectioned below the cementoenamel. The root segments were connected to a hydraulic pressure apparatus to measure dentine permeability after the following sequential steps (n = 10 per group): I) Baseline; II) treatment with phosphoric acid for 30 s (maximum permeability); III) Toothbrushing (1 min) according to the experimental groups (G1- control; G2- 5000 ppm fluoride toothpaste; G3- 8% arginine-calcium carbonate toothpaste); IV) acid challenge for 5 min (orange juice). The data were converted into percentage, considering stage II as 100%.

Results: The results have shown a statistically significant decreasing on dentine permeability after treatment with toothpaste (Friedman test and Dunn's post hoc test). Comparison among groups demonstrated a high increasing on dentine permeability when acid challenge was performed after toothbrushing with distilled water (control group) (Kruskal-Wallis and Dunn's post hoc test).

Conclusion: The toothpaste treatment may provide sufficient resistance on dentine surface, preventing dentinal tubules exposure after acid challenge.

Figures

Figure 1
Figure 1
Schematic presentation showing how specimens were created and how fluid permeability was measured.
Figure 2
Figure 2
Experimental design. The specimens were divided into 3 groups (G1- Negative control; G2 – Duraphat® 5000 toothpaste; G3 – Colgate® Pro-Relief. Dentine permeability evaluation was performed at baseline (Stage 1); after 37% phosphoric acid application (Stage 2); after treatment (Experimental Groups- Stage 3); after erosion (Stage 4).

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