Effect of different artificial aging protocolson fluorescence of resin composites

Autor(es)

Elielson Nóbrega da Silva ^[1] ; Ayla Macyelle de Oliveira Correia ^[2] ; Eduardo Bresciani ^[2] ; Taciana Marco Ferraz Caneppele ^[2]

Afiliação do(s) autor(es)

^[1] São Paulo State University. Department of Restorative Dentistry. Institute of Science and Technology - Brasil

^[2] Sao Paulo State Univ UNESP, Inst Sci & Technol, Dept Restorat Dent, BR-12245000 Sao Jose Dos Campos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: MATERIA-RIO DE JANEIRO; v. 23, n. 4 2018-12-06.

Resumo

ABSTRACT This study evaluated the effect of different artificial aging on fluorescence of resin composites. Forty-five cylindrical specimens (6mm in diameter and 1mm thick) were made of each resin composite: IPS Empress Direct, Filtek™ Z350 XT, and Durafill. A baseline measurement of fluorescence by the direct method using the fluorescence spectrophotometer RF-5301 PC was performed. After, resin specimens were divided into 3 groups according to artificial aging protocol to be submitted: (1) aging by mechanical brushing: 30,000 cycles were performed, with fluorescence measurements after 10,000, 20,000 and 30,000 cycles; (2) chemical aging by ethanol: the samples were immersed in ethanol for 15 days, with measurements after 5, 10 and 15 days of immersion; (3) light aging: resin specimens were subjected to UV radiation for 216h with fluorescence readings after 72, 144, 216h. Data were submitted to one-way repeated measures ANOVA and Tukey’s test (α=0.05). Baseline fluorescence of the tested resins was ranked in this ascending order: Durafill < Filtek Z350 XT < IPS Empress Direct. Simulated toothbrushing and ethanol immersion reduced fluorescence, except for Z350 XT. For light exposition, fluorescence was reduced after 100h for Empress Direct and Durafill, while a reduction after 100h and 200h was detected for Z350 XT. Artificial aging protocols influenced the fluorescence and that this phenomenon is material dependent. In general, the fluorescence is reduced with aging. (AU)

• Processo FAPESP: 13/21760-3 - Influência de diferentes protocolos de envelhecimento artificial sobre a fluorescência de resinas compostas
• Beneficiário: Elielson Nóbrega da Silva
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica