Evaluation of photopolymerization efficacy and temperature rise of a composite resin using a blue diode laser (445 nm).
blue diode laser
light emitting diode
polymerization efficiency
surface microhardness
temperature rise
Journal
European journal of oral sciences
ISSN: 1600-0722
Titre abrégé: Eur J Oral Sci
Pays: England
ID NLM: 9504563
Informations de publication
Date de publication:
12 2020
12 2020
Historique:
accepted:
20
09
2020
pubmed:
24
10
2020
medline:
26
1
2021
entrez:
23
10
2020
Statut:
ppublish
Résumé
The purpose of this study was to evaluate the photopolymerization efficacy of a diode laser (445 nm) for use with a composite containing camphorquinone and to estimate the safety of the method related to the temperature rise. Five cylindrical composite specimens were prepared for each thickness: 1, 2, and 3 mm. Three light-curing modes were investigated: a light emitting diode (LED) unit and a diode laser (445 nm) with output powers at 0.7 W or 3 W. Evaluation of the polymerization efficacy was based on Vickers hardness measurements, and the highest temperatures at the bottom of the specimens were recorded using a K-type thermocouple. The highest microhardness was observed after the diode laser curing operating at 3 W. A comparison of the microhardness of the 0.7 W laser cured specimens with the LED cured specimens showed a statistically significant difference in favor of the laser curing. Laser curing operating at 3 W resulted in extremely high temperatures. Laser curing at 0.7 W resulted in statistically significantly higher maximum temperatures than did LED curing for both 1 mm thick (52.9°C against 45.4°C) and 3 mm thick (43.6°C against 40.9°C) specimens. Diode laser (445 nm) may be an alternative for photopolymerization of composite materials and may result in a higher degree of conversion and depth of cure of composites than what has been seen with LED curing units when they emit at the same energy density.
Substances chimiques
Composite Resins
0
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
535-541Informations de copyright
© 2020 Eur J Oral Sci.
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