Effect of the difference in spectral outputs of the single and dual-peak LEDs on the microhardness and the color stability of resin composites.
10.5395/JKACD.2011.36.2.108
- Author:
Hye Jung PARK
1
;
Sung Ae SON
;
Bock HUR
;
Hyeon Cheol KIM
;
Yong Hoon KWON
;
Jeong Kil PARK
Author Information
1. Department of Conservative Dentistry, Pusan National University School of Dentistry, Yangsan, Korea. jeongkil@pusan.ac.kr
- Publication Type:Original Article
- Keywords:
Alternative photoinitiators;
Camphorquinone;
Color stability;
Dual-peak light emitting diode (LED);
Microhardness;
Spectral outputs
- MeSH:
Camphor;
Composite Resins;
Enzyme Multiplied Immunoassay Technique;
Fungi;
Glass;
Light;
Polytetrafluoroethylene
- From:Journal of Korean Academy of Conservative Dentistry
2011;36(2):108-113
- CountryRepublic of Korea
- Language:English
-
Abstract:
OBJECTIVES: To determine the effect of the spectral output of single and dual-peak light emitting diode (LED) curing lights on the microhardness and color stability of commercial resin composites formulated with camphorquinone and alternative photoinitiators in combination. MATERIALS AND METHODS: Three light-polymerized resin composites (Z100 (3M ESPE), Tetric Ceram (Ivoclar Vivadent) and Aelite LS Posterior (Bisco)) with different photoinitiator systems were used. The resin composites were packed into a Teflon mold (8 mm diameter and 2 mm thickness) on a cover glass. After packing the composites, they were light cured with single-peak and dual-peak LEDs. The Knoop microhardness (KHN) and color difference (DeltaE) for 30 days were measured. The data was analyzed statistically using a student's t-test (p < 0.05). RESULTS: All resin composites showed improved microhardness when a third-generation dual-peak LED light was used. The color stability was also higher for all resin composites with dual-peak LEDs. However, there was a significant difference only for Aelite LS Posterior. CONCLUSIONS: The dual-peak LEDs have a beneficial effect on the microhardness and color stability of resin composites formulated with a combination of camphorquinone and alternative photoinitiators.
