Document Detail

Assessing the irradiance delivered from light-curing units in private dental offices in Jordan.
MedLine Citation:
PMID:  23904579     Owner:  NLM     Status:  In-Data-Review    
BACKGROUND: The authors conducted a study to examine the irradiance from light-curing units (LCUs) used in dental offices in Jordan.
METHODS: Two of the authors visited 295 private dental offices (15 percent) in Jordan and collected the following information about the LCUs: age, type (quartz-tungsten-halogen or light-emitting diode), date of last maintenance, type of maintenance, last date of use, number of times used during the day, availability of a radiometer, exposure time for each resin-based composite increment, size of light-curing tips and presence of resin-based composite on the tips. The authors used a radiometer to measure the irradiance from the LCUs. They used linear regression with stepwise correlation for the statistical analysis. The authors set the minimum acceptable irradiance at 300 milliwatts/square centimeter.
RESULTS: The mean irradiance of the 295 LCUs examined was 361 mW/cm(2), and 136 LCUs (46.1 percent) delivered an irradiance of less than 300 mW/cm(2). The unit's age, type and presence of resin-based composite on the light-curing tips had a significant effect on the irradiance (P ≤ .001).
CONCLUSIONS: Only 37 of the 141 quartz-tungsten-halogen units (26.2 percent) and 122 of the 154 light-emitting diode units (79.2 percent) delivered at least 300 mW/cm(2). Resin contamination on the light-curing tips had a significant effect on the irradiance delivered. The irradiance from the LCUs decreased with use. Practical Implications. The irradiance from many of the units in this study was less than 300 mW/cm(2), which may affect the quality of resin-based composite restorations. Dentists should monitor the performance of the LCUs in their offices weekly.
Ghada A Maghaireh; Hanan Aizraikat; Nessrin A Taha
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of the American Dental Association (1939)     Volume:  144     ISSN:  1943-4723     ISO Abbreviation:  J Am Dent Assoc     Publication Date:  2013 Aug 
Date Detail:
Created Date:  2013-08-01     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7503060     Medline TA:  J Am Dent Assoc     Country:  United States    
Other Details:
Languages:  eng     Pagination:  922-7     Citation Subset:  D; IM    
Dr. Maghaireh is an assistant professor, Department of Conservative Dentistry, Jordan University of Science and Technology, P.O. Box 3030, Irbid-22110, Jordan,
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