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Materials (Basel). 2014 Jan 20;7(1):554-562. doi: 10.3390/ma7010554.

Visible Light Curable Restorative Composites for Dental Applications Based on Epoxy Monomer.

Author information

1
Politecnico di Torino, Department of Applied Science and Technology, C.so Duca degli Abruzzi 24, Torino 10129, Italy. alessandra.vitale@polito.it.
2
Politecnico di Torino, Department of Applied Science and Technology, C.so Duca degli Abruzzi 24, Torino 10129, Italy. marco.sangermano@polito.it.
3
Politecnico di Torino, Department of Applied Science and Technology, C.so Duca degli Abruzzi 24, Torino 10129, Italy. roberta.bongiovanni@polito.it.
4
Ivoclar Vivadent AG, Macromolecular Chemistry & Synthesis, Bendererstrasse 2, Schaan FL-9494, Liechtenstein. peter.burtscher@ivoclarvivadent.com.
5
Ivoclar Vivadent AG, Macromolecular Chemistry & Synthesis, Bendererstrasse 2, Schaan FL-9494, Liechtenstein. norbert.moszner@ivoclarvivadent.com.

Abstract

A cationic photo-curable cycloaliphatic epoxy resin has been investigated as reactive monomer in blue light crosslinking process. We have demonstrated that camphorquinone is able to abstract labile hydrogen from the epoxy monomer, giving rise to the formation of carbon-centered radicals that are oxidized by the onium salt; a complete epoxy group conversion was reached after 50 s of irradiation. The presence of water up to 1 wt% was tolerated without any important detrimental effect on the kinetics of light-curing. The presence of the inorganic filler up to 65 wt% did not significantly influence the curing process.

KEYWORDS:

cationic photopolymerization; epoxy monomer; visible light curing

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