Scanning Electron Microscopy and Roughness Study of Dental Composite Degradation

Autor(es)

Silva Soares, Luis Eduardo ^{[1, 2]} ; Cortez, Louise Ribeiro ^[1] ; Zarur, Raquel de Oliveira ^[1] ; Martin, Airton Abrahao ^[1]

Afiliação do(s) autor(es)

^[1] Univ Vale de Paraiba, UNIVAP, Lab Biomed Vibrat Spect, Res & Dev Inst, IP&D, BR-12244000 Sao Jose Dos Campos, SP - Brazil

^[2] Univ Vale de Paraiba, UNIVAP, Dept Dent Mat & Operat Dent, Sch Dent, BR-12244000 Sao Jose Dos Campos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Microscopy and Microanalysis; v. 18, n. 2, p. 289-294, APR 2012.
• Citações Web of Science: 7

Resumo

Our aim was to test the hypothesis that the use of mouthwashes, consumption of soft drinks, as well as the type of light curing unit (LCU), would change the surface roughness (Ra) and morphology of a nanofilled composite resin (Z350 (R) 3M ESPE). Samples (80) were divided into eight groups: Halogen LCU, group 1, saliva (control); group 2, Pepsi Twist (R); group 3, Listerine (R); group 4, Colgate Plax (R); LED LCU, group 5, saliva; group 6, Pepsi Twist (R); group 7, Listerine (R); group 8, Colgate Plax (R). Ra values were measured at baseline, and after 7 and 14 days. One specimen of each group was prepared for scanning electron microscopy analysis after 14 days. The data were subjected to multifactor analysis of variance at a 95% confidence followed by Tukey's honestly significant difference post-hoc test. All the treatments resulted in morphological changes in composite resin surface, and the most significant change was in Pepsi Twist (R) groups. The samples of G6 had the greatest increase in Ra. The immersion of nanofilled resin in mouthwashes with alcohol and soft drink increases the surface roughness. Polymerization by halogen LCU (reduced light intensity) associated with alcohol contained mouthwash resulted in significant roughness on the composite. (AU)

• Processo FAPESP: 07/07984-5 - Caracterização vibracional, física e mecânica da degradação de compósitos dentais.
• Beneficiário: Luís Eduardo Silva Soares
• Modalidade de apoio: Auxílio à Pesquisa - Regular