Influence of a hydrophobic monomer on the physical and mechanical properties of experimental surface sealants

Autor(es)

Maria Cecília Caldas GIORGI ^[1] ; Amalie Perez VOGT ^[2] ; Carina de Jesus CORNETA ^[2] ; Marilia Mattar de Amoêdo Campos VELO ^[4] ; Débora Alves Nunes Leite LIMA ^[5] ; Giselle Maria Marchi BARON ^[2] ; Flávio Henrique Baggio AGUIAR ^[7]

Afiliação do(s) autor(es)

^[1] Universidade Estadual do Amazonas. School of Health Sciences - Brasil

^[2] Univ Estadual Campinas Unicamp, Piracicaba Dent Sch, Dept Restorat Dent, Piracicaba, SP - Brazil

^[3] Universidade de São Paulo. Bauru School of Dentistry. Department of Operative Dentistry, Endodontics and Dental Materials - Brasil

^[4] Universidade Estadual de Campinas. Piracicaba Dental School. Department of Restorative Dentistry - Brasil

^[5] Universidade Estadual de Campinas. Piracicaba Dental School. Department of Restorative Dentistry - Brasil

• Tipo de documento: Artigo Científico
• Fonte: Brazilian Oral Research; v. 32, 2018-10-11.

Resumo

Abstract This study evaluated the effect of adding the hydrophobic monomer 1,12 dodecanediol dimethacrylate (DDDMA) to experimental sealants with and without thermocycling on degree of conversion (DC), water sorption (WS), water solubility (WSB), color stability (ΔE), and micro-shear bond strength (μSBS). Five experimental and one commercially available sealant (Bisco - BIS) were tested. The experimental sealants were formulated by mixing different percentages of DDDMA monomers and urethane dimethacrylate (UDMA). The photoinitiator system was composed by camphorquinone (CQ) and tertiary amine 4-ethyl benzoate dimetilamiono (EDBA). Ethanol was used as a solvent. The experimental groups were named sequentially according to the monomeric content (DDDMA/UDMA): S40/40 (40/40), S50/30 (50/30), S60/20 (60/20), S70/10 (70/10) and S80/0 (80/0). Data were analyzed separately by one-way ANOVA, followed by Tukey’s test (p<0.05). The values of DC ranged from 94.59% (S40/40) to 54.02% (S80/10). BIS showed the highest WS value (p<0.05) and S40/40, S50/30, S60/20 and S80/0 showed the lowest WS values of all tested sealants. WSB values ranged from 7.88 µg/mm3 (BIS) to 13.27 µg/mm3 (S70/10). The highest ΔE value was 11.05±2.88 for BIS and the highest μSBS value was found for S60/20. No significant difference was observed in bond strength between sealants and bovine enamel after thermocycling. Adding DDDMA to the composition of surface sealants can improve its performance, once the monomer increased the degree of conversion and the color stability. (AU)

• Processo FAPESP: 13/25376-3 - Avaliação da resistência de união de selantes de superfície experimentais aplicados ao esmalte bovino
• Beneficiário: Carina de Jesus Corneta
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica
• Processo FAPESP: 13/17868-3 - Avaliação de propriedades físicas de selantes de superfície experimentais e da influência na estabilidade de cor de um compósito
• Beneficiário: Amalie Perez Vogt
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica