Document Detail

Effect of curing time and light curing systems on the surface hardness of compomers.
MedLine Citation:
PMID:  16130877     Owner:  NLM     Status:  MEDLINE    
This study compared the Vickers hardness of the top and bottom surfaces of two compomers (Compoglass F and Dyract AP) polymerized for 20 and 40 seconds with two different light curing systems. Five samples for each group were prepared using Teflon molds (9x2 mm) and were light-cured either with a conventional halogen lamp (Optilux 501) or LED light (LEDemetron I) for 20 or 40 seconds. After curing, all the samples were stored in distilled water for 24 hours at 37 degrees C. The Vickers hardness measurements were obtained from the top and bottom surfaces of each sample. ANOVA, Scheffé and t-test were used to evaluate the statistical significance of the results. For the top and bottom surfaces, the light curing systems and curing times tested showed no statistical difference, except for Optilux 501, which used 20 seconds for both compomers (p<0.05). There was no significant difference in the microhardness of both surfaces of Compoglass F and Dyract AP cured for either 20 or 40 seconds using LEDemetron I. With Optilux 501, the microhardness of samples cured for 40 seconds was significantly higher than 20 seconds (p<0.05).
Zepnep Okte; Patricia Villalta; Franklin Garcia-Godoy; Franklin Garcia-Godoy; Peter Murray
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Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  Operative dentistry     Volume:  30     ISSN:  0361-7734     ISO Abbreviation:  Oper Dent     Publication Date:    2005 Jul-Aug
Date Detail:
Created Date:  2005-08-31     Completed Date:  2005-10-11     Revised Date:  2007-03-22    
Medline Journal Info:
Nlm Unique ID:  7605679     Medline TA:  Oper Dent     Country:  United States    
Other Details:
Languages:  eng     Pagination:  540-5     Citation Subset:  D    
Department of Pediatric Dentistry, Faculty of Dentistry, University of Ankara, Ankara, Turkey.
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MeSH Terms
Compomers / chemistry*,  radiation effects
Composite Resins / chemistry
Equipment Design
Glass Ionomer Cements / chemistry
Lighting / instrumentation*
Materials Testing
Polymers / chemistry
Surface Properties
Time Factors
Water / chemistry
Reg. No./Substance:
0/Compoglass; 0/Compomers; 0/Composite Resins; 0/Dyract; 0/Glass Ionomer Cements; 0/Polymers; 7732-18-5/Water

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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