Abstract |
The purpose of this study was to determine colour changes in a composite cured with tungsten- halogen, light-emitting diode (LED) or a plasma arc after 5 years. Five specimens 10 mm in diameter and 2 mm in height were prepared using Hybrid ( Clearfil AP-X) composite for each test group. The corresponding specimens were cured with a tungsten- halogen curing light, a LED unit or with a plasma arc. Specimens were stored in light-proof boxes for 5 years after the curing procedure to avoid further exposure to light and stored in 37 degrees C in 100% humidity. Colorimetric values of the specimens immediately after curing and after 5 years were measured using colorimeter. The DeltaE*( ab ) values varied significantly depending on the curing unit used (p < 0.001). Curing time did not affect the colour changes of the specimens (p = 0.4). The results of this study suggest that composite materials undergo measurable changes due to the curing unit exposure.
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Authors | Onjen Tak, Subutay Han Altintas, Nilgun Ozturk, Aslihan Usumez |
Journal | Clinical oral investigations
(Clin Oral Investig)
Vol. 13
Issue 1
Pg. 29-35
(Mar 2009)
ISSN: 1436-3771 [Electronic] Germany |
PMID | 18769947
(Publication Type: Journal Article)
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Chemical References |
- Clearfil AP-X
- Composite Resins
- Dental Materials
- Methacrylates
- Resin Cements
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Topics |
- Color
- Colorimetry
- Composite Resins
(chemistry, radiation effects)
- Curing Lights, Dental
(classification)
- Dental Materials
(chemistry, radiation effects)
- Equipment Design
- Humans
- Humidity
- Materials Testing
- Methacrylates
(chemistry, radiation effects)
- Radiation Dosage
- Resin Cements
(chemistry, radiation effects)
- Surface Properties
- Temperature
- Time Factors
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