Effect of 457 nm light on the polymerization of dental composite resins / 대한치과재료학회지
Korean Journal of Dental Materials
;
(4): 179-186, 2018.
Article
in English
| WPRIM
| ID: wpr-759664
ABSTRACT
The aim of this study was to determine if a 457 nm blue laser could effectively polymerize dental composite resins. After light curing 6 dental composite resins using a laser or a LED light-curing unit at 530 mW/cm2 and 900 mW/cm2, respectively, degree of conversion and microhardness were evaluated. Degree of conversion of specimens by the laser and LED was similar (on top surface 54.4–67.7% and 55.2–67.1%, respectively; on bottom surface 35.1–53.8% and 45.4–53.1%, respectively). Microhardness was also similar (on top surface 28.5–83.6 Hv and 19.1–82.4 Hv, respectively; on bottom surface 22.5–65.4 Hv and 16.8–74.4 Hv, respectively), although, in some cases, laser-treated specimens showed slightly lower microhardness than the LED-treated on bottom surface. The present study shows that the 457 nm laser can polymerize dental composite resins to the same level as LED achieved.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Polymers
/
Composite Resins
/
Polymerization
Language:
English
Journal:
Korean Journal of Dental Materials
Year:
2018
Type:
Article
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