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. 2024 Apr:143:104901.
doi: 10.1016/j.jdent.2024.104901. Epub 2024 Feb 27.

Characteristics of tin-containing fluoride toothpastes related to erosive tooth wear protection

Letícia Oba Sakae  1 , Cláudia Allegrini Kairalla  1 , Ítallo Emídio Lira Viana  2 , Thiago Saads Carvalho  3 , Samira Helena Niemeyer  3 , Anderson Takeo Hara  4 , Taís Scaramucci  5
Affiliations

Characteristics of tin-containing fluoride toothpastes related to erosive tooth wear protection

Letícia Oba Sakae et al. J Dent. 2024 Apr.

Abstract

Objectives: To assess the effect of different tin-containing toothpastes on the control of erosive tooth wear in enamel and dentin.

Methods: Enamel and dentin slabs were randomly distributed into 7 experimental groups (n = 10/substrate): C-: negative control (Artificial saliva); AmF (regular fluoridated toothpaste without tin); Sn-1 (SnF2/NaF); Sn-2 (SnF2/NaF/SnCl2); Sn-3 (SnCl2/NaF); Sn-4 (SnF2/SnCl2); Sn-5 (SnCl2/AmF/NaF/chitosan). Specimens were submitted to 5-day erosion-abrasion cycling. Surface loss (SL) was determined with an optical profilometer. Tin deposition on the tooth surfaces and some characteristics of the toothpastes (pH, potentially available F-, %weight of solid particles, and RDA) were also assessed. Data were statistically analyzed (α = 0.05).

Results: For enamel, the Sn-2 presented the lowest SL, not differing significantly from AmF, C+, and Sn-3. The SL of these groups was significantly lower than the C-, except for Sn-3. Sn-1 and Sn-4 were also not significantly different from C-. For dentin, C- significantly showed the highest SL values, whilst, Sn-1 presented the lowest SL, not differing significantly from AmF, Sn-2, C+, and Sn-3. There was a significant positive association between enamel SL and the pH and tin deposition. Dentin SL was significantly negatively associated with the %weight of solid particles and RDA.

Conclusions: Most of the tin-toothpastes were able to exhibit some protection against ETW. In this process, the toothpastes characteristics play a role, as lower enamel SL was significantly associated with lower pH values and tin deposition; and lower dentin SL was associated with higher %weight of solid particles and RDA of the toothpastes.

Clinical significance: Tin-containing toothpastes can be used for erosive tooth wear protection, but our study showed that their effect depends on the pH, amount of tin deposition, % weight of solid particles and RDA of the toohpastes.

Keywords: Dental erosion; Erosive tooth wear; Fluoride; Tin; Tooth abrasion; Toothpaste.

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Conflict of interest statement

Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

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