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Effect of initiator and inhibitor concentration on the polymerization shrinkage kinetics of experimental dental composites
- Authors
- Lee, I.B.; Sang, E.J.; Kim, J.Y.; Choi, N.S.
- Issue Date
- Jun-2014
- Publisher
- European Conference on Composite Materials, ECCM
- Keywords
- Experimental dental composite; Inhibitor; Initiator; Polymerization shrinkage stress
- Citation
- 16th European Conference on Composite Materials, ECCM 2014
- Indexed
- SCOPUS
- Journal Title
- 16th European Conference on Composite Materials, ECCM 2014
- Abstract
- We prepared experimental dental composites with different curing rates by varying the concentration of photo-initiator (Camphorquinone) and inhibitor (Butylatedhydroxytoluene). During photo-activated curing, the polymerization shrinkage, maximum shrinkage rate and polymerization shrinkage stress of the composites were measured using a laboratory made strain-stress analyzer for 10 min. The polymerization shrinkage stress of the composites ranged 2.97-7.91 MPa, which increased with increasing initiator concentration. Increased inhibitor concentration reduced shrinkage stress and curing rate.
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