Transenamel and Transdentinal Penetration of H2O2 in Restored Bovine Teeth

Autor(es)

Fraga Briso, Andre Luiz ^[1] ; Goncalves, Rafael Simoes ^[2] ; de Azevedo, Fernanda Almeida ^[3] ; Gallinari, Marjorie de Oliveira ^[3] ; dos Santos, Paulo Henrique ^[4] ; Fagundes, Ticiane Cestari ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Paulista UNESP, Aracatuba Dent Sch, Dept Restorat Dent, Sao Paulo - Brazil

^[2] Univ Sao Paulo, Bauru Sch Dent, Dept Restorat Dent, Bauru - Brazil

^[3] Univ Estadual Paulista UNESP, Aracatuba Dent Sch, Sao Paulo - Brazil

^[4] Univ Estadual Paulista UNESP, Aracatuba Dent Sch, Dept Dent Mat & Prosthodont, Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Journal of Adhesive Dentistry; v. 17, n. 6, p. 529-534, 2015.
• Citações Web of Science: 0

Resumo

Purpose: To quantify hydrogen peroxide (H2O2) penetration into restored bovine teeth subjected to whitening treatment. Materials and Methods: Seventy-five enamel/dentin disks were divided into 5 groups (n = 15): intact disks (G1); cavity preparation only (G2); conventional adhesive system and composite resin (G3); resin-modified glass-ionomer cement (G4); and self-etching adhesive only (G5). After 24 h, the disks were placed into artificial pulp chambers containing an acetate buffer solution, and the first whitening session was performed using a 35% H2O2 (hydrogen peroxide) product. The disks were submitted to 10,000 thermal cycles and then stored for 1 year in deionized water. After this period, a second whitening session was performed. After each whitening procedure, the buffer solutions were analyzed for optical density in a spectrophotometer to assess the amount of H2O2 that had diffused. ANOVA and Tukey's test were used to compare the different groups and a Student's t-test was used to compare the different times (p <= 0.05). Results: Prior to aging, group 2 had the highest penetration of H2O2; the other groups showed similar, lower penetration. After thermocycling and aging, all groups showed a significant increase in H2O2 penetration. The greatest penetration of H2O2 into the pulp chamber was found in groups 2 and 5. Conclusion: Aged restorations allowed greater H2O2 permeation through the tooth structure. (AU)

• Processo FAPESP: 10/17200-4 - Análise neurosensorial da sensibilidade dentária ocorrida durante o clareamento dental caseiro
• Beneficiário: Fernanda Almeida de Azevedo
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica