The Effect of Air-Abrasion Applied on Root Surface Cavities on Microleakage of Composite Resins

Abstract

The aim of this in vitro study was to evaluate the effect of air abrasion as a substitute for acid etching on microleakage of four different type of composite resins at root surface cavities. Eighty extracted maxillary anterior teeth were used. Standardized cavities 2x3 mm at 1mm below the cemento-enamel junction were prepared on the labial root surfaces of each tooth. The teeth were randomly divided into main two groups n=40 . While the margins of cavities of group I were etched for 20 seconds with 37% phosphoric acid, the margins of the cavities of group II were air abraded for 6 seconds as a substitute for acid etching Micadent . Then, the two main groups were divided into 4 subgroups, respectively n=10 . The cavities of each ten teeth belonging to these groups were restored with a flowable Flowline , an ormoser based Admira , a hybrid-packable Glacier , a hybrid Charisma composite resins and polymerized with a halogen light-curing device Hilux Expert . After thermocycling procedure, specimens were immersed in 0.5% basic fuchsin dye for 24 hours. Upon removal from dye solutions, the teeth were sectioned from the midpoint of the composite restorations, evaluated under microscope Leica MZ 12 and scored via a scale. The results were analyzed statistically with ANOVA and Multiple Comparison tests. None of the groups used in this study was able to eliminate the microleakage completely. Flow composite Flowline applied with 37% phosphoric acid showed the lowest microleakage and exhibited statistically significant differences than the other groups p

Keywords

• Air abrasion, composite resin, microleakage, acid etching, root surface

Kök yüzeyi kavitelerine air-abrazyon uygulamasının kompozit rezinlerin mikrosızıntıları üzerine etkisi

Abstract

Bu in vitro çalışmanın amacı, kök yüzeyine açılmış kavitelerde asitle pürüzlendirme yerine uygulanan air abrazyonun 4 farklı tip kompozit rezinin mikrosızıntısı üzerine etkisini değerlendirmektir. Çalışmada, 80 maksiller anterior diş kullanıldı. Sement-mine birleşiminin 1 mm altında her bir dişin labial kök yüzeyine standart kaviteler 2x3 mm açıldı. Dişler önce rastgele 2 ana gruba ayrıldı n=40 . I.gruptaki dişlerin kavite marjinlerine 20 saniye %37’lik fosforik asit uygulanırken, II.gruptaki dişlerin kavite marjinlerine asit ile püzülendirme yerine 6 saniye air abrazyon Micadent uygulandı. Bu 2 ana grup daha sonra 4’er alt gruba ayrıldı n=10 . Dişlerin kaviteleri bir akıcı Flowline , bir ormoser esaslı Admira , bir hybrid- packable Glacier ve bir hibrid Charisma kompozit rezin ile restore edilerek halojen ışık cihazı Hilux Expert ile polimerize edildiler. Termal siklus işleminden sonra örnekler 24 saat %0.5’lik bazik fuksin içerisine yerleştirildi. Boya solüsyonlarının uzaklaştırılmasından sonra, kompozit dolguların ortasından geçecek şekilde dişlerden kesitler alındı, mikroskop ile incelendi Leica MZ 12, Wetzler, Almanya ve skala ile mikrosızıntı dereceleri skorlandı. Sonuçlar ANOVA and Mul-tiple Comparison testleri kullanılarak istatistiksel olarak değerlendirildi. Çalışmadaki hiçbir grup mikrosızıntıyı tamamıyla elimine edemedi. %37 fosforik asit uygulanmış akıcı kompozit Flowline grubu en az mikrosızıntıyı gösterdi ve diğer gruplardan istatistiksel olarak farklı bulundu p

Keywords

• Air abrazyon, kompozit rezin, mikrosızıntı, asit ile pürüzlendirme, kök yüzeyi

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