Role of desensitizing/whitening dentifrices in enamel wear

• Published in: Journal of dentistry 2020-08, Vol.99, p.103390-103390, Article 103390
• Main Authors: Lima, Leonardo Custódio de, Viana, Ítallo Emídio Lira, Paz, Sara Laís Pereira da, Bezerra, Sávio José Cardoso, João-Souza, Samira Helena, Carvalho, Thiago Saads, Scaramucci, Taís
• Format: Article
• Language: English
• Subjects: Abrasion; Brushing; Citric acid; Dental Enamel; Dentifrices; Dentin; Dentistry; Desensitization; Desensitizing toothpastes; Enamel; Erosive tooth wear; Fluoride treatments; Fluorides; Humans; Humidity; Impact analysis; Profilometers; Repair; Saliva; Slurries; Surface roughness; Teeth; Tooth Abrasion; Tooth Erosion; Toothbrushing; Toothpastes; Wear; Whitening toothpastes
• ISSN: 0300-5712; 1879-176X
• DOI: 10.1016/j.jdent.2020.103390

To analyze the impact of desensitizing (D) and/or whitening (W) dentifrices on erosion and erosion-abrasion. Enamel specimens were allocated into 10 groups (n = 20): 1. Artificial saliva (control); 2. Sensodyne Repair&Protect (SRP–D); 3. Sensodyne Repair&Protect Whitening (SRP–W); 4. Colgate Sensitive Pro-Relief (CSPR–D); 5. Colgate Sensitive Pro-Relief Real White (CSPRR–W); 6. Colgate Total 12 (CT); 7. Colgate Total 12 Professional Whitening (CTP–W); 8. Sensodyne True White (ST–W); 9. Curaprox Black is White (CB–W); 10. Oral-B 3D White Perfection (OB3D-W). For abrasion (n = 10), 30,000 brushing strokes were performed and surface roughness (SR) was evaluated. Erosion-abrasion (n = 10) consisted of 1 % citric acid (2 min), artificial saliva (60 min); 6×/day; 5 days. Toothbrushing was carried out 2×/day (45 strokes). Surface loss (SL) was determined with an optical profilometer. Data were statistically analyzed (α = 0.05). Relative to SR, only OB3D-W had a significantly rougher surface than the control (p = 0.014). SRP-D, CSPR-D and ST-W showed no difference from the baseline. High SL was observed for ST-W, OB3D-W and CTP-W, without significant differences from the control. CT showed the lowest SL, not differing from SRP–D and SRP–W. There was a weak negative correlation between SL and concentration of free fluoride in the slurries, SL and SR, and SL and pH, all p > 0.05. Only one dentifrice increased surface roughness of enamel to a higher degree than brushing with saliva. Brushing with the test dentifrices did not cause higher enamel erosive wear than brushing with saliva. This study enhances our knowledge on the effect of desensitizing and whitening dentifrices, indicating that they do not worsen enamel loss due to abrasion and they might be a safe option for individuals with erosive tooth wear.