Avaliação da microinfiltração marginal e da dureza de restaurações classe II de resina composta, utilizando dois sistemas de polimerização e duas tecnicas restauradoras

AUTOR(ES)
DATA DE PUBLICAÇÃO

2001

RESUMO

The aim of this study was to evaluate the marginal microleakage and the microhardness of class II composite resin restorations using two restorative techniques and two polymerization systems. One hundred twenty class II cavity were prepared in bovine teeth and it were randomly divided into four groups: DEME 1- Bulk increment + conventional polymerization (Optilux 500/DEMETROM); DEME 3- Bucco-lingual increments + conventional polymerization; SOFT 1- Bulk increment + soft-start polymerization (Degulux Soft-StartlDEGUSSA); SOFT 3- Bucco-lingual increments + soft-start polymerization. All cavities were restored with the ZlOO/Single Bond system (3M). After thermocycling (1000 cycles at 5 °C and 55°C), the samples were immersed in methilene blue 2% dye solution, for 4 hours, and the microleakage was evaluated. Half of samples was embedded in polyester resin, polished and the Knoop microhardness was measured. Fisher Exact test showed statistical significant difference of microleakage among groups (p<0,05). No statistical differences (ANOV A) were found for hardness for all groups at any depth. Incremental technique showed less leakage, regardless of the polymerization systems used. The soft-start system provided polymerization similar to conventional system, but could not improved the marginal sealing

ASSUNTO(S)

infiltração resinas dentarias

ACESSO AO ARTIGO

Documentos Relacionados