Effect of Different Curing Lights on Surface Hardness of Hybrid and Nanohybrid Composite Resins

Abstract

The aim of this study was to evaluate the effectof halogen and LED light curing units on surfacehardness of a nanohybrid composite resin and ahybrid composite resin. 40 standard holes, each 2 mm thick and 5 mmin diameter were prepared on the top surfaces ofplexiglass molds. Half of the holes were filled witha nanohybrid composite resin Grandio and theothers were filled with a hybrid composite resin Charisma . 20 specimens were prepared for eachcomposite resin. Half of the composite specimenswere then polymerized 40 s from the top surfacesusing a halogen light curing unit and the otherswere polymerized using a LED light curing unit for10 s. The specimens were divided into four groupseach containing 10 composite specimens. All specimens were placed in dark colored glass containersand were stored at 37°C for one week. Surfacehardness measurements were made by using Barcolsurface hardness measuring device from three different points on the top surface of each specimenand the average values were calculated. The datawere subjected to statistical analysis using threeway ANOVA and Duncan’s Multiple Range test ata significance level of p

Keywords

• Composite resin, light curing unit,surface hardness

FARKLI IŞIK CİHAZLARININ HİBRİT VE NANOHİBRİT KOMPOZİT REZİNLERİN YÜZEY SERTLİĞİNE ETKİSİ

Abstract

Bu çalışmanın amacı; bir hibrit ve birnanohibrit kompozit rezinin yüzey sertliği üzerinebiri halojen ışık cihazı diğeri LED ışık cihazı olmaküzere farklı ışık cihazlarıyla polimerizasyonun etkisini değerlendirmektir. Bu amaçla 2 mm kalınlığındaki pleksiglasskalıplar üzerinde 5 mm çapında 40 adet standartyuva hazırlandı. Yuvaların yarısına nanohibritkompozit rezin Grandio diğer yarısına hibrit kompozit rezin Charisma uygulandı. Bu şekilde kompozit rezinlerin herbiri için hazırlanan 20 adetörneğin yarısı halojen ışık cihazı ile 40 s, diğeryarısı LED ışık cihazı ile üreticilerin tavsiye ettiğisüre olan 10 s süreyle üst yüzeylerinden polimerizeedildi. Her bir kompozit rezin-ışık cihazı kombinasyonunda 10 adet örnek olacak şekildehazırlanan örnekler 4 gruba ayrıldı. Tüm örneklerkoyu renkli cam şiselere yerleştirildikten sonra 37°C de etüvde 1 hafta süre ile bekletildi. SonraBarcol yüzey sertlik ölçüm cihazıyla her bir örneğinüst yüzeyinin üç değişik noktasından yüzey sertlikölçümleri yapılarak ortalamaları hesaplandı.Sonuçlar Üç Yönlü Varyans Analizi ve DuncanÇoklu Karşılaştırma Yöntemi kullanılarak istatistiksel olarak değerlendirildi p

Keywords

• Kompozit rezin, ışık polimerizasyon cihazı, yüzey sertliği

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