Banca de DEFESA: THIAGO CLÍSTINES DE MEDEIROS
Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.DISCENTE : THIAGO CLÍSTINES DE MEDEIROS
DATA : 06/12/2018
HORA: 13:30
LOCAL: Departamento de Odontologia
TÍTULO:
EVALUATION OF BOND STRENGTH OF REPAIRS IN BULK FILL RESINS AFTER DIFFERENT PROTOCOLS OF ADHESION
PALAVRAS-CHAVES:
Dental restoration repair; composite resins; adhesiveness.
PÁGINAS: 52
GRANDE ÁREA: Ciências da Saúde
ÁREA: Odontologia
SUBÁREA: Materiais Odontológicos
RESUMO:
Objective: To evaluate the microtensile bond strength of repairs performed on bulk fill and conventional composite resins subjected to aging, after different adhesion protocols.Materials and methods: 42 specimens (8x8x4 mm3) of each of the following materials were prepared in shade A1: a microhybrid composite (Filtek Z250 XT-3M ESPE, St. Paul, MN, USA) and a regular consistency bulk fill (Filtek Bulk Fill - 3M ESPE, St. Paul, MN, USA). These specimens were aged by storage in artificial saliva at 37 ° C for 30 days. After, they received a mechanical surface treatment by means of abrasion with a diamond bur 4138F, followed by the division in six groups, according to the adhesion protocol employed: FSA - etching with 37% phosphoric acid + silane + conventional adhesive (Single Bond 2 - 3M ESPE, St. Paul, MN, USA); SA - silane + conventional adhesive; FA - etching with 37% phosphoric acid + conventional adhesive; A - conventional adhesive; FU - 37% phosphoric acid + universal adhesive (Universal Bond Single - 3M ESPE, St. Paul, MN, USA); U - universal adhesive. All specimens were repaired with Z250 XT composite, in shade A3, to differentiate them from the base materials. The repaired resin blocks were cut into sticks (8x1x1 mm3) and submitted to microtensile test. Fractured specimens were evaluated by macrophotography to determine the type of fracture (adhesive or cohesive). In order to analyze the differences among the adhesion protocols and among the composite types, two-way ANOVA statistical test was used, with a significance level of 5%. Results: No statistically significant differences were found in bond strength values among the adhesion protocols (p=0.38) and among the composite resins repaired (p=0.13), as well as no interaction between these variables (p=0.16). Conclusion: For the aging pattern adopted in this study, repair bond strength of bulk fill composites was similar to that found in conventional microhybrid composites, with no distinction between several adhesion protocols.
MEMBROS DA BANCA:
Presidente - 2966816 - MARILIA REGALADO GALVAO RABELO CALDAS
Externo ao Programa - 1247082 - DIANA FERREIRA GADELHA DE ARAUJO
Externo à Instituição - ANA KARINA MACIEL DE ANDRADE - UFPB