Emine SÜTLAŞ, Zerhan KIZILELMA ÇELİKTEN, Şaziye ARAS

Mine yüzeyi hazırlama tekniklerinin iki farklı fissür örtücünün mikrosızıntısına etkisi

In–vitro çalışmamızda, üç farklı mine yüzeyihazırlama tekniğinin, farklı doldurucu oranlarınasahip rezin esaslı fissür örtücülerin mikrosızıntısına etkisinin araştırılması amaçlanmıştır. Çalışmada, 60 adet çekilmiş çürüksüz yirmi yaş dişi kullanılmıştır n=10 . Mine yüzeylerine; 1. grupta;%37’ lik fosforik asit FGM, Condec 37,USA 30sn, 2. grupta; sadece Er:YAG lazer 240 mJ, 10 Hz,2940nm dalga boyu , 3.grupta; lazeri takiben asit15sn uygulanmıştır. Yıkanıp kurutulan mine yüzeylerine rezin içerikli farklı doldurucu oranlarınasahip iki ayrı fissür örtücü Clinpro TM, 3M ESPE;Helioseal F, Ivoclar Vivadent uygulanarak LEDışık kaynağıyla polimerize edilmiştir. 1000 kez 5/550C termal siklusa tabi tutulan dişler bukkolingual yönde ikiye ayrılarak, bazik fuksinle boyasızıntı testine tabi tutulmuştur. Mikrosızıntı X50büyültmede değerlendirilmiştir. Veriler KruskalWallis Test ile karşılaştırılmıştır. Çalışmamızdamikrosızıntının, fissür örtücülerin yüzey hazırlamatekniği ile ilişkili olarak şekillendiği gözlenmiştir.Lazer grubundaki mikrosızıntı değerleri, asit ve lazeri takiben asit uygulanan gruplara oranla anlamlı şekilde yüksek bulunmuştur p 0.05 . Çalışmanın sonucundahem dolduruculu hem de doldurucusuz resin esaslıfissür örtücülerde mineye tek başına uygulananEr:YAG lazerin mikrosızıntıyı olumsuz yönde etkilediği bulunmuştur. Lazeri takiben uygulanan asidin, mikrosızıntı açısından sadece asit uygulamasına oranla ilave bir yarar sağlamadığı sonucunavarılmıştır

Anahtar Kelimeler:

Pit ve fissür örtücü, ER:YAG lazer, mikrosızıntı

Effect of Enamel Preperation Methods on Microleakage of Two Different Fissure Sealants

This in-vitro study compared the microleakage of unfilled and filled resin–based fissure sealant materials, after acid etched and Er:YAG laser treated enamel. Extracted sound human third molars were randomly assigned into 6 groups n=10/each . The occlusal surfaces were sealed with an unfilled Clinpro TM, 3M ESPE and filled Helioseal F, Ivoclar Vivadent resin-based fissure sealant material after one of the following pretreatments; 1. phosphoric acid etching only 30 sc ; 2. Er:YAG laser 240 mJ, 10 Hz, 2940nm wavelength ; 3. Er:YAG laser + acid etching 15 sc . Teeth were thermal cycled from 5-55 0C 1000 times with 15 sc dwell time at each temperature. Teeth were sectioned bucco-lingually and stained with basic fuchsin. Microleakage was evaluated at X50 optical magnification with a stereo-microscope. Data were statistically analysed with Kruskal-Wallis test. In this study, microleakage was found to be related to the enamel surface conditioning rather than the filler ratio of the material. Marginal leakage of the filled resin sealant was found to be similar with the unfilled resin group p>0.05 . The microleakage in Er:YAG laser group displayed greater microleakage than the other groups p 0.05 . Er:YAG laser irradiation did not eliminate the need for the acid etching of the enamel surface before sealant application

Keywords:

Pit and fissure sealant, ER:YAGlaser, microleakage,

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