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

Autor(es)

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

Afiliação do(s) autor(es)

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

• Tipo de documento: Artigo Científico
• Fonte: ARCHIVES OF ORAL BIOLOGY; v. 89, p. 65-69, MAY 2018.
• Citações Web of Science: 1

Resumo

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)

• Processo FAPESP: 11/12901-7 - Análise in vitro e in situ da erosão dental e de métodos de prevenção em pacientes portadores da doença do refluxo gastroesofágico
• Beneficiário: Regina Guenka Palma-Dibb
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 12/06711-3 - Efeito dos lasers Nd:YAG e diodo na dentina erodida e abrasionada
• Beneficiário: Regina Guenka Palma-Dibb
• Modalidade de apoio: Auxílio à Pesquisa - Regular