Efficacy of different strategies to treat root dentin eroded by liquid or gaseous hydrochloric acid associated with brushing abrasion

Author(s)

Faraoni, Juliana Jendiroba ^[1] ; Torres Toro, Carmen Victoria ^[1] ; Machado de Matos, Lais Lopes ^[1] ; Palma-Dibb, Regina Guenka ^[1]

Affiliation

^[1] Univ Sao Paulo, Sch Dent Ribeirao Preto, Dept Restorat Dent, Av Cafe S-N, BR-14040904 Ribeirao Preto, SP - Brazil

• Document type: Journal article
• Source: ARCHIVES OF ORAL BIOLOGY; v. 89, p. 65-69, MAY 2018.
• Web of Science Citations: 1

Abstract

Objective: This study aims to evaluate how casein phosphopeptide-amorphous calcium phosphate (CPP-ACP) associated with Nd:YAG or Diode laser affects dentin exposed to hydrochloric acid (HCl) with or without tooth brushing. Design: One hundred and sixty human root dentin blocks were selected after they were initially eroded with liquid HCl (pH 1.2) 3x for one day. The blocks were divided into the following groups: G1- liquid HCl (HCl-l), G2- HCl-l + brushing, G3- gaseous HCl (HCl-g), and G4- HCl-g + brushing. Each group was randomly assigned to the following treatments (n = 10): A) Control (no treatment), B) CPP-ACP, C) CPP-ACP associated with Nd:YAG laser (lambda = 1064 nm) (40 mJ, 10 Hz, 0.4 W, 15s), and D) CPP-ACP associated with Diode laser (lambda. = 980 nm) (0.5 W, 200 ps, 15 s). The treatment with CPP-ACP (G2, G3 and G4) was applied on the dentine surface for 5 min. Erosion (6x/day/20 s) and erosion (6x/day/20 s) with abrasion (2x/10 s) were performed for five days. Dentin volume loss was determined by 3D confocal laser microscopy. Data were analyzed with two-way ANOVA and Tukey's tests. Results: G1 - CPP-ACP (10.77 +/- 1.66) and CPP-ACP associated with Diode laser (9.98 +/- 0.89) showed lower volume loss in relation Control group (12.86 +/- 0.63) (p < 0.05). G2 - CPP-ACP associated with Diode laser (12.41 +/- 1.08) elicited lower volume loss as compared to the Control (14.42 +/- 1.24) (p < 0.05). As for G3 and G4, all treatments showed similar volume loss. Conclusion: CPP-ACP and CPP-ACP associated with Diode laser could control dental tissue loss in dentin eroded by liquid 110. Moreover, CPP-ACP associated with Diode laser could effectively decrease dental tissue loss in dentin exposed to liquid HCl and brushing. (AU)

• FAPESP's process: 11/12901-7 - In vitro and in situ analysis of dental erosion and prevention methods in patients with gastroesophageal reflux disease
• Grantee: Regina Guenka Palma-Dibb
• Support Opportunities: Regular Research Grants
• FAPESP's process: 12/06711-3 - Nd:YAG and diode lasers effect on eroded and abraded dentin
• Grantee: Regina Guenka Palma-Dibb
• Support Opportunities: Regular Research Grants