Effect of therapeutic dose X rays on mechanical and chemical properties of esthetic dental materials
Adriana Dibo da Cruz, Mário Alexandre Coelho Sinhoreti, Gláucia Maria Ambrosano, Alessandra Nara de Souza Rastelli, Vanderlei Salvador Bagnato, Frab Norberto Bóscolo
ARTIGO
Inglês
The aim of this study was to investigate the influence of therapeutic dose X rays on the microhardness (MH) and degree of conversion (DC) of two different esthetic restorative dental materials. The materials were photo-activated with a LED light-curing unit using three cure-times: 5, 20 and 40...
Ver mais
The aim of this study was to investigate the influence of therapeutic dose X rays on the microhardness (MH) and degree of conversion (DC) of two different esthetic restorative dental materials. The materials were photo-activated with a LED light-curing unit using three cure-times: 5, 20 and 40 seconds. The photo-activation was carried out in two distinct periods: before and after irradiation with doses of 5, 35 and 70 Gy, from a 6 MV X rays beam. In accordance with the methodology used, it was conclude that a therapeutic dose does not have a detrimental effect on the photoinitiator molecules, because the photo-activation occurred after they were irradiated. When the irradiation was applied before photo-activation, the materials showed MH improvement, but when photo-activation was performed after irradiation, there was less improvement. However, there was no correlation between MH and DC. Thus, a therapeutic dose applied to cured material can promote linking and breaking of chain bonds in a non-linear way.
Ver menos
Aberto
Effect of therapeutic dose X rays on mechanical and chemical properties of esthetic dental materials
Adriana Dibo da Cruz, Mário Alexandre Coelho Sinhoreti, Gláucia Maria Ambrosano, Alessandra Nara de Souza Rastelli, Vanderlei Salvador Bagnato, Frab Norberto Bóscolo
Effect of therapeutic dose X rays on mechanical and chemical properties of esthetic dental materials
Adriana Dibo da Cruz, Mário Alexandre Coelho Sinhoreti, Gláucia Maria Ambrosano, Alessandra Nara de Souza Rastelli, Vanderlei Salvador Bagnato, Frab Norberto Bóscolo
Fontes
Materials research. Ibero-american journal of materials (Fonte avulsa) |