Effect of commercial fluoride dentifrices against hydrochloric acid in an erosion-abrasion model.

Objectives: This study assessed the effect of three commercial dentifrices with different fluoride-containing compounds in controlling the progression of dentin loss using an in vitro erosion-abrasion model.

Materials And Methods: Dentin specimens were randomized into four groups (n = 10): control (no F), Elmex (1,400 ppm AmF), Meridol (1,400 ppm AmF/SnF2), and Crest Pro-Health (1,100 ppm SnF2). The dentin specimens were submitted to cycles of demineralization (HCl 0.01 M for 60 s), remineralization (artificial saliva for 60 min), and immersion in 1:3 w/w of dentifrice/artificial saliva, followed by toothbrushing (150 brushing strokes). The cycle was repeated three times daily for 5 days. Surface loss was quantified by stylus profilometry. Data were submitted to one-way ANOVA and Tukey's tests (p < 0.05).

Results: Wear (μm ± SD) was control 4.1 ± 1.2, Elmex 3.7 ± 1.5, Meridol 1.3 ± 0.4, and Crest Pro-Health 2.1 ± 0.7. Therefore, all products (except Elmex) produced statistically significantly less mineral loss (p < 0.05) when compared with the control.

Conclusion: None of the dentifrices avoided the erosive-abrasive process; however, SnF2-containing dentifrices were effective in statistically significantly reducing dentin loss.

Clinical Relevance: Scientific literature shows evidence that fluoride can strengthen dental tissue against erosive acid damage. However, the beneficial effect of different fluorides present in commercial dentifrices is questionable. Thus, a determination of an effective fluoride dentifrice may be beneficial in the reduction of the erosive process in patients with gastric disorders.