Effect of Topical Fluoride Applications on the Microhardness of Bulk-Fill Composites

Year 2013, Volume: 6 Issue: 4, 1357 - 1363, 01.01.2013

Selçuk Savaş Başak Bölükbaşı Ebru Küçükyılmaz

Abstract

The aim of this study is to assess the effect on the surface microhardness of different bulk-fill composite resin materials after different topical fluoride applications. Twenty-two disc shaped specimens 8.0 x 2.5 mm for each material Clearfil Majesty ES-2, Tetric N-Ceram Bulk Fill, Sonic Fill were prepared and photopolimerized. The samples were stored in distilled water at 37°C for 24 hours and then initial microhardness of the materials was determined. Specimens were randomly assigned to 2 experimental groups according to surface treatment regimens consisting of 2% Sodium fluoride NaF gel and 1.23% acidulated phosphate fluoride APF gel. These groups were assigned to 3 experimental subgroups; 1 minute, 4 minutes and 4x4 minutes gel application. Then, microhardness measurements were repeated. Statistical analysis were made with repeated measures ANOVA and Bonferroni correction a=0.05 . The application that most decreased the microhardness values of Clearfil Majesty ES-2 and Sonic Fill was 4x4 min. APF gel application and it was 4 min APF application for Tetric-N-Ceram Bulk Fill p>0.05 . Different topical fluoride applications did not affect the microhardness values of the composite resins with different content used in the study

Keywords

Bulk-Fill Composite, Microhardness, Topical Fluoride Application

Topikal Flor Uygulamalarının Bulk-Fill Kompozitlerin Mikrosertlikleri Üzerine Etkisi

Abstract

Bu in-vitro çalışmanın amacı, farklı topikal flor uygulamalarının çeşitli bulk-fill kompozit materyallerin mikrosertlik özelikleri üzerine olan etkilerinin belirlenmesidir. Çalışmada kullanılan her bir materyal için Clearfil Majesty ES-2, Tetric N-Ceram Bulk Fill, Sonic Fill disk şeklinde 72 adet örnek 8.0 x 2.5 mm hazırlandı ve polimerize edildi. Polimerizasyonu tamamlanan örnekler 24 saat 37°C’de deiyonize su içerisinde bekletildi ve ardından başlangıç mikrosertlik ölçümleri yapıldı. Örnekler rastlantısal olarak %2’lik Sodyum florid NaF ve %1.23’lük Asidule fosfat florür APF jelin uygulandığı 2 gruba ayrıldı. Bu gruplar da; 1dk, 4 dk ve 4x4 dk jel uygulaması olmak üzere kendi içinde 3 alt gruba ayrıldı. Topikal flor uygulaması sonrası mikrosertlik ölçümleri tekrar edildi. İstatistiksel analizler, tekrarlanan ölçümlü ANOVA testi ve Bonferroni düzeltmesi ile gerçekleştirildi a=0,05 . Materyallerin mikrosertlik değerlerini en çok düşüren uygulama Clearfil Majesty ES-2 ve Sonic Fill materyalleri için 4x4 dk APF uygulaması olurken, Tetric N-Ceram Bulk Fill için 4 dk APF uygulaması oldu p>0,05 . Farklı topikal flor uygulamalarının çalışmada kullanılan bulk-fill kompozit materyallerin mikrosertlik değerlerini etkilemediği görüldü

Keywords

Bulk-Fill Kompozit, Mikrosert

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