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Balkan Journal of Stomatology
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Balkan Journal of Stomatology
2013, vol. 17, br. 2, str. 75-78
Effect of different light curing systems on surface hardness of composite resins
(naslov ne postoji na srpskom)
Gokce Kagana, Ersoy Mustafaa, Ozel Emreb, Sabuncu Hilmic
aYeditepe University, Faculty of Dentistry Department of Operative Dentistry Istanbul, Turkey
bUniversity of Kocaeli, Faculty of Dentistry, Department of Operative Dentistry Kocaeli, Turkey
cYeditepe University, Department of Basic Medical Sciences, Istanbul, Turkey

e-adresa: kagangokce@hotmail.com
Sažetak
(ne postoji na srpskom)
Aim: The purpose of this study was to evaluate the effect of different light curing systems on surface hardness of composites. Materials and Methods: Composite samples (2 mm thick, 6 mm in diameter, n=10) were prepared in a teflon mould using different light curing systems. Group 1: Hybrid composite samples Filtek Z250 (3M ESPE, St. Paul MN, USA) were polymerized with halogen light source (PolyLUX II, KaVo, Germany) for 20 seconds. Group 2: Hybrid composite Filtek Z250 samples were polymerized with halogen light source for 20 seconds, then additional polymerization was performed in Coltene D.I.-500 oven. Group 3: Composite samples Filtek Z250 were polymerized with LED light source (Elipar FreeLight 2, 3M ESPE, St. Paul MN, USA) for 20 seconds. Group 4: Composite samples Filtek Z250 were polymerized with LED light source for 20 seconds, then additional polymerization was performed in Coltene D.I.- 500 oven. Group 5: Tescera indirect composite samples were polymerized in Tescera ATL (Bisco, Inc. Schaumburg, IL, USA). The hardness test was performed using a digital microhardness tester (Buehler, Lake Bluff, Illinois, USA) with load of 500 g and dwell time of 15 seconds. The hardness was measured from the top and the bottom of the composite discs. Data were analyzed by using Student t-test, 1-WayANOVA and Tukey's tests (p<0.05). Results: The mean values and standard deviations were as follows: Group 1 (top = 66.50 ± 1.28; bottom = 64.81 ± 1.45); Group 2 (top = 68.06 ± 1.76; bottom = 66.71 ± 2.27); Group 3 (top = 69.80 ± 0.97; bottom = 67.01 ± 2.16); Group 4 (top = 69.85 ± 0.92; bottom = 68.05 ± 0.81); Group 5 (top = 71.05 ± 1.46; bottom = 71.33 ± 1.08). Conclusion: Tescera ATL system exhibited the highest microhardness values. The group in which halogen lamp and additional polymerization was used, showed significantly higher hardness values than the group in which only halogen lamp was used. However, additional polymerization did not affect the values when LED systems were used.
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O članku

jezik rada: engleski
vrsta rada: izvorni članak
objavljen u SCIndeksu: 24.09.2013.

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