Toothpaste factors related to dentine tubule occlusion and dentine protection against erosion and abrasion

Autor(es)

Joao-Souza, Samira Helena ; Sakae, Leticia Oba ; Lussi, Adrian ; Correa Aranha, Ana Cecilia ; Hara, Anderson ; Baumann, Tommy ; Scaramucci, Tais ; Carvalho, Thiago Saads

• Tipo de documento: Artigo Científico
• Fonte: CLINICAL ORAL INVESTIGATIONS; v. 24, n. 6, p. 10-pg., 2019-10-17.

Resumo

Objectives To investigate the effect of toothpastes on dentine surface loss and tubule occlusion, and the association of toothpaste-related factors to each of the outcomes. Materials and methods One hundred and sixty human dentine specimens were randomly distributed into 10 groups, according to different toothpastes. The specimens were submitted to artificial saliva (60 min), citric acid (3 min), and brushing abrasion (25 s; totalizing 2 min in toothpaste slurries). This was repeated five times and two outcome variables were analyzed: dentine surface loss (dSL; mu m) and tubule occlusion by measurement of the total area of open tubules (Area-OT; mu m(2)). Data were analyzed with Kruskal-Wallis and Mann-Whitney tests (alpha = 0.05); bivariate and multivariate regressions were used to model the association of the chemical (pH, concentration of F-, Ca2+, and PO43- and presence of Sn2+) and physical (% weight of solid particles, particle size, and wettability) factors of the toothpastes to both outcome variables. Results Toothpastes caused different degrees of dSL and did not differ in Area-OT. All chemical and physical factors, except the presence of Sn2+, were associated with dSL (p < 0.001). Area-OT was associated only with the presence of Sn2+ (p = 0.033). Conclusion Greater dSL was associated with lower pH, lower concentration of F-, higher concentration of Ca2+ and PO43-, greater % weight of solid particles, smaller particle size, and lesser wettability, whereas tubule occlusion was associated with the presence of Sn2+. (AU)

• Processo FAPESP: 15/23620-0 - Efeito de pastas dessensibilizantes na erosão e abrasão inicial de esmalte
• Beneficiário: Samira Helena Niemeyer
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Doutorado