Anti-erosive effect of rinsing before or after toothbrushing with a Fluoride/Stannous Ions solution: an in situ investigation Application order of Fluoride/Tin products for erosive tooth wear

Author(s)

Machado, Alana ; Sakae, Leticia ; Niemeyer, Samira Helena ; Carvalho, Thiago Saads ; Amaechi, Bennett ; Scaramucci, Tais

• Document type: Journal article
• Source: Journal of Dentistry; v. 101, p. 6-pg., 2020-10-01.

Abstract

Objective: To evaluate the impact of the application of a F /Sn2+-containing mouthrinse before or after toothbrushing with a F /Sn2+/chitosan toothpaste on the progression of erosion/abrasion on enamel and dentin. Methods: This crossover in situ study had five arms: Control (toothbrushing without toothpaste), Brushing (toothbrushing with toothpaste), Brushing + Rinsing, Rinsing + Brushing, and Rinsing (without toothbrushing). Fifteen subjects used removable mandibular appliances containing 3 enamel and 3 dentin specimens, which were subjected to erosion-abrasion cycling of 60 min salivary pellicle formation followed by 5 min extra-oral erosion with 1% citric acid (4x/day for 5 days). Treatments were performed in situ after first and last erosive challenges with rinse (10 ml; 30 s) and/or toothbrushing with/without toothpaste (with electric toothbrush; 5 s per specimen; total 2 min contact with slurry). Surface loss (SL) was evaluated with an optical profilometer. Data were analyzed by two-way repeated measures ANOVA and Tukey tests (a = 0.05). Results: The Control showed the highest SL (mean +/- SD for enamel: 24.58 +/- 11.32; dentin: 32.32 +/- 10.10; all mu m). Rinsing alone resulted in significantly lower SL value (enamel: 8.30 +/- 4.96; dentin: 16.15 +/- 8.29) compared with arms that applied toothpaste, except Brushing + Rinsing. None of the arms that underwent toothbrushing with the toothpaste differed from each other (p > 0.05). Dentin specimens showed significantly higher SL values than enamel (p < 0.001). Conclusion: The order of treatment applications had no influence on their anti-erosive effect; however, toothbrushing with F /Sn2+/chitosan toothpaste reduced enamel surface loss. Additional rinsing with F /Sn2+ mouthrinse did not offer improved protection. Clinical significance: The use of fluoride- and stannous- containing toothpastes and mouthrinses is an important approach in the prevention of erosive tooth wear. Further evidence is needed to support the benefit of combining these products against this condition. (AU)

• FAPESP's process: 17/09408-3 - In situ evaluation of the anti-erosive effect of the association between sodium fluoride and propylene glycol alginate
• Grantee: Letícia Oba Sakae
• Support Opportunities: Scholarships in Brazil - Master
• FAPESP's process: 17/24714-3 - Effect of the order of application of dentifrices and solutions containing fluorides and tin in the progression of erosive wear on enamel and bovine dentin - in situ study
• Grantee: Alana Cristina Machado
• Support Opportunities: Scholarships in Brazil - Doctorate