COMPARİSON OF MİCROLEAKAGE LEVELS OF CLASS-V HYBRİD COMPOSİTE RESİN RESTORATİONS

Abstract

The aim of study was to compare the microleakage levels of two hybrid composites applied with a total-etch bonding system in Class-V restorations on permanent molars.

15 non-carious, permanent molars were used in study. Teeth were cleaned and polished with brush, rubber cup and nonfluoride pumice. They were stored in distilled water containing 0.1% thymol for disinfecting for 24hours. 30 box-shaped Class-V cavities (4x2x2mm) were prepared on the middle buccal and lingual surfaces of the teeth. After the etching of cavities with phosphoric acid gel a total-etch bonding agent was applied to the cavities and polymerized for 20s with halogen light unit.

A hybrid composite resin was placed in buccal cavities and another hybrid composite resin was applied to the lingual cavities. All samples were polymerized for 40s with halogen light unit. After finishing-polishing procedures, teeth were stored in distilled water at 370C for 24h, thermocycled (+5/+550C/x500) and immersed in 0.5% basic fuchsin at 370C for 24h. Teeth were separated buccolingually and evaluated for dye-penetration using a stereomicroscope (10x2.5magnification). Data were determined with Kruskal-Wallis and Wilcoxon-Signed Range Tests (p<0.05).

There was not statistical difference between two hybrid composite resin groups (p>0.05). Microleakage was found higher at cervical margins than occlusal margins statistically (p<0.05).

Use of both hybrid composites with total-etch bonding system was found appropriate for Class-V restorations in permanent molars. However, the risk of leakage was found higher at cervical margins than occlusal’s.

Keywords

• Total-etch bonding agents,Hybrid resin composites

SINIF-V HİBRİD KOMPOZİT REZİN RESTORASYONLARIN MİKROSIZINTI DÜZEYLERİNİN KARŞILAŞTIRILMASI

Abstract

Bu çalışmanın amacı, daimi azı dişlerin Sınıf-V restorasyonlarında, bir total-etch bağlayıcı sistemle birlikte uygulanan iki hibrid kompozit rezin materyalin mikrosızıntı düzeylerinin karşılaştırılmasıdır.

Çalışmada, 15 adet çürüksüz daimi azı dişi kullanıldı. Çekilen dişler fırça, lastik ve flor içermeyen bir pat yardımıyla temizlendi ve %0.1 timol içeren distile suda 24saat bekletilerek dezenfekte edildi. Dişlerin bukkal ve lingual yüzeylerinin orta üçlüsüne, 4x2x2 ebatlarında 30 adet, kutu şeklinde Sınıf-V kavite açıldı. Kavitelere % 35’lik fosforik asit jel (ve ardından total-etch bağlayıcı ajan uygulandı ve halojen ışık kaynağıyla 20sn süreyle polimerize edildi. Bir hibrid kompozit rezin materyal bukkal kavitelere ve diğer hibrid kompozit rezin materyal lingual kavitelere yerleştirildi. Tüm kompozit rezin örnekler halojen ışık kaynağıyla 40sn süreyle polimerize edildi. Bitirme ve polisaj işlemleri yapılan dişler distile suda, 370C’de 24saat bekletildi ve +5/+550C’de 500 kez termosiklus uygulandı. Ardından %0.5’lik bazik fuksin’de 370C’de 24saat bekletilen dişler bukkolingual olarak kesildi ve mikrosızıntı düzeyleri 10x2.5 büyütmeyle stereomikroskopta incelendi. Bulgular, Kruskal-Wallis ve Wilcoxon-Signed Range Testleriyle istatistiksel olarak değerlendirildi (p<0.05).

Çalışmanın bulguları değerlendirildiğinde, İki hibrid kompozit rezin grubun mikrosızıntı düzeyleri arasında istatistiksel yönden farklılık bulunmadı (p>0.05). Servikal kenarlarda, okluzal kenarlara oranla istatistiksel olarak daha fazla mikrosızıntı olduğu gözlendi (p<0.05).

Bu çalışmada daimi azı dişlerin Sınıf-V restorasyonlarında, total-etch bağlayıcı sistemle birlikte her iki hibrid kompozit rezin materyalin kullanımının da uygun olduğu, bununla birlikte servikal kenarlarda oklüzala oranla daha yüksek mikrosızıntı riskinin bulunduğu sonucuna varıldı.

Keywords

• Total-etch bağlayıcı ajanlar,Hibrid kompozit rezinler

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