Impact of adhesive and photoactivation method on sealant integrity and polymer network formation

• Autor(a) principal: Borges,Boniek Castillo Dutra
• Data de Publicação: 2012
• Outros Autores: Pereira,Fabrício Lopes da Rocha, Alonso,Roberta Caroline Bruschi, Braz,Rodivan, Montes,Marcos Antônio Japiassú Resende, Pinheiro,Isauremi Vieira de Assunção, Santos,Alex José Souza dos
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Brazilian Oral Research
• Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1806-83242012000300011
• topic: Hardness Tests; Dental Marginal Adaptation; Polymerization

We evaluated the influence of photoactivation method and hydrophobic resin (HR) application on the marginal and internal adaptation, hardness (KHN), and crosslink density (CLD) of a resin-based fissure sealant. Model fissures were created in bovine enamel fragments (n = 10) and sealed using one of the following protocols: no adhesive system + photoactivation of the sealant using continuous light (CL), no adhesive system + photoactivation of the sealant using the soft-start method (SS), HR + CL, or HR + SS. Marginal and internal gaps and KHN were assessed after storage in water for 24 h. The CLD was indirectly assessed by repeating the KHN measurement after 24 h of immersion in 100% ethanol. There was no difference among the samples with regard to marginal or internal adaptation. The KHN and CLD were similar for samples cured using either photoactivation method. Use of a hydrophobic resin prior to placement of fissure sealants and curing the sealant using the soft-start method may not provide any positive influence on integrity or crosslink density.