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Relative efficiency of radiation sources for photopolymerization.

Abstract
The aim of this study was to evaluate the characteristics of new-generation light-emitting diode (LED) units in comparison with the conventional tungsten-halogen, plasma arc, and first-generation LED units reported in our previous study. The irradiance of light from new-generation LED units, the temperature rise of the bovine enamel surface, and the depth of cure of composites exposed to each unit were investigated. The irradiances in the range 400-515 nm emitted from the new-generation LED units were greater than those from the first-generation LED units. The temperature increase was 15-25 degrees C for new-generation LED units compared with a typical value of 5 degrees C for the first-generation LED units at 10 s of irradiation. The relationship between the depth of cure and the logarithm of total exposure energy suggested that LED units can cure light-cured composite resins more efficiently than tungsten-halogen or plasma arc units.
AuthorsRie Nomoto, John F McCabe, Keiko Nitta, Susumu Hirano
JournalOdontology (Odontology) Vol. 97 Issue 2 Pg. 109-14 (Jul 2009) ISSN: 1618-1247 [Print] Japan
PMID19639454 (Publication Type: Comparative Study, Evaluation Study, Journal Article)
Chemical References
  • Composite Resins
Topics
  • Animals
  • Cattle
  • Composite Resins (radiation effects)
  • Curing Lights, Dental (classification)
  • Dental Enamel (radiation effects)
  • Dose-Response Relationship, Radiation
  • Light-Curing of Dental Adhesives (instrumentation, methods)
  • Temperature

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