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Degree of conversion and temperature rise during polymerization of composite resin samples with blue diodes

To ensure an adequate clinical composite filling light source for photopolymerization is of great importance. In everyday clinical conditions commonly used unit for polymerization of composite material is halogen curing unit. The development of new blue superbright light emitting diodes (LED) comes as an alternative to standard halogen curing unit. The purpose of this study was to compare the degree of conversion (DC) and tempeature rise of four hybrid composite materials during 40 sec illumination with standard halogen curing unit Heliolux GTE, Elipar Highlight and 16 LED on the surface and 1 mm depth. The results revealed only a little bit higher DC values in case of polymerization with even 66 times stronger halogen curing units which showed twice higher temperature than blue diodes. Tempeature and DC obtained are higher on the surface than on 1 mm depth ragardless on the light source used.

blue superbright light emitting diodes; degree of conversion; temperature; photopolymeization; composite resins; halogen curing units

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