Effects of Newer Bleaching Materials Paint-on on the Surface Hardness of Various Restorative Materials

Abstract

The purpose of this in vitro study was to evaluate the effects of new three paint-on bleachingmaterials on surface hardness of a composite resin,a compomer and a high-viscosity glass ionomercement. Fifty cylindrical samples of each restorativematerial were prepared and randomly divided intofive groups n=10 . One group were selected forbaseline and Vickers microhardness measurementswere taken. The other three groups were treatedwith one of three paint-on bleaching agents.Remaining group were selected as control and notsubjected to bleaching treatment. The treated and control samples were alsosubsequently subjected to same microhardness testing by using the same method applied to the baseline measurements. Data were analyzed statistically. Overall, a decrease in surface hardness wasnoted in all of the bleaching groups. Surface hardness differences were also found between restorative materials. The highest hardness was observedin composite resin while the lowest was for glassionomer. It was observed that the effects of paint-onbleaching agents on surface hardness were dependent upon restorative materials

Keywords

• Bleaching, surface hardness,restorative materials

YENİ AĞARTICI AJANLARIN PAINT-ON ÇEŞİTLİ RESTORATİF MATERYALLERİN YÜZEY SERTLİKLERİ ÜZERİNE ETKİLERİ

Abstract

Bu çalışmanın amacı, 3 paint-on ağartıcıajanın bir kompozit rezin, bir kompomer ve bir yüksek viskoziteli cam iyonomer siman›n yüzey sertliği üzerine etkisini değerlendirmekti. Her bir restoratif materyale ait 50 örnek haz›rland› ve rasgele 5’er gruba ayr›ld› n:10 . Bir grup başlang›ç ölçümü için değerlendirildi ve Vickers yüzey sertlik ölçümü al›nd›. Diğer 3 gruptaki örneklere 3 paint-on ağartma ajanlar›ndan biri uyguland›. Kalan son grup kontrol grubu olarak değerlendirildi ve herhangi bir ağartma işlemi uygulanmad›. Kontrol ve tedavi grubu örnekleri başlang›ç ölçümleri ile ayn› şekilde yüzey sertlik ölçümüne maruz b›rak›ld›. Veriler istatistiksel olarak analiz edildi. Toplamda, tüm ağartma gruplar›nda yüzey sertliğinde azalma kaydedildi. Restoratif materyaller aras›nda da yüzey sertliğinde farkl›l›klar izlendi. En düşük yüzey sertliği cam iyonomer simanda, en yüksek de kompozit rezinde görüldü. Ayr›ca, ağartma ajanlar›n›n yüzey sertliği üzerine etkisinin, kullan›lan restoratif materyale bağl› olduğu bulundu.

Keywords

• Ağartma, yüzey sertliği,restoratif materyaller

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