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Curing effectiveness of a light emitting diode on dentin bonding agents
Sun-Young Kim1, In-Bog Lee, Byeong-Hoon Cho
1Department of Conservative Dentistry, School of Dentistry, Seoul National University, Seoul, Korea.
Journal of Biomedical Materials Research. Part B, Applied Biomaterials
|September 30, 2005
Summary
Light emitting diode (LED) curing lights may not always match halogen light curing units in bonding effectiveness for dental materials. Some dentin bonding agents showed lower bond strength with LED curing, rejecting the hypothesis of similar performance.
Area of Science:
- Dental Materials Science
- Biomaterials Engineering
- Polymer Chemistry
Background:
- Dentin bonding agents (DBAs) are crucial for dental restorations.
- Light curing units (LCUs) polymerize DBAs, with LED and halogen technologies being common.
- Assessing the comparative effectiveness of different LCUs is vital for clinical success.
Purpose of the Study:
- To test if light emitting diode (LED) LCUs provide statistically similar dentin shear bond strength (DSBS) compared to halogen LCUs.
- To evaluate five commercial DBAs using both LED and halogen LCUs.
- To determine if irradiance similarity translates to equivalent curing effectiveness.
Main Methods:
- Characterized emission spectrum and spectral irradiance of LED and halogen LCUs.
- Measured DSBS for five DBAs cured by each LCU type.
- Employed two-way analysis of variance to analyze differences in DSBS.
Main Results:
- Halogen LCU exhibited higher total irradiance than the LED LCU.
- Spectral irradiance differences were minimal within camphoroquinone activation wavelengths.
- Most DBAs showed similar DSBS regardless of LCU type, but Clearfil SE Bond performed best with halogen light.
Conclusions:
- The null hypothesis was rejected, indicating potential differences in curing effectiveness.
- LED LCUs may demonstrate lower curing effectiveness for certain DBAs compared to halogen LCUs.
- Bond strength outcomes can vary depending on the specific DBA and LCU combination.