Ali Rıza ÇETİN, Ahmet Ercan HATAYSAL, Bilal AKTAŞ

Yeni iki tip kompozit materyalin mekanik özelliklerinin karşılaştırılması

Amaç: Bu çalışmanın amacı posterior ve üniversal kullanım için üretilen dental kompozit materyalleri, bükülme dayanımı, mikro sertlik ve yüzey pürüzlülüğü gibi mekanik özellikleri açısından şu an piyasada yaygın olarak kullanılan kompozit materyallerle karşılaştırmaktır. Gereç ve Yöntemler: Bu çalışmada, yeni üretilen NOVA Compo-HS ve NOVA Compo-N ile şu an piyasada yaygın olarak kullanılan kompozit materyallerden olan Photoposterior, Estelite Posterior, Xtra fill, AELITE™ All-Purpose Body, Filtek Bulkfill ile Tetric N-Ceram Bulkfill kullanıldı. Her bir materyalden silindir şeklinde (10x2mm boyutlarında) 20’şer örnek hazırlandı ve sonrasında örneklerin Ra cinsinden yüzey pürüzlülüğü ve Vickers sertlik değerleri belirlendi. Daha sonra her bir materyalden (2x2x25 mm boyutunda) dikdörtgen şeklinde örnekler hazırlanarak, instron cihazında 1 mm/dk hızda bükülme dayanımı değerleri belirlendi. İstatistiksel analiz için tek yönlü ANOVA ve Tukey’s HSD ve Scheffe testleri kullanıldı. Bulgular: Materyaller arasında bükülme dayanımları, sertlik ve pürüzlülük açısından farklılıklar gözlendi (p

Comparison of mechanical properties of two different types of new composite materials

Background: The aim of this study is to compare new dental composite materials produced for posterior or universal use in terms of their mechanical properties such as flexural strength, micro hardness and surface roughness. Methods: New formulation composites NOVA Compo-HS, NOVA Compo-N and currently existing composites: Photoposterior, Estelite Posterior, X-tra fill, AELITE™AllPurpose Body, Filtek Bulkfill, Tetric N-Ceram Bulkfill were used in this study.20 cylindrical specimens were prepared (10x2mm) of each material. Vickers hardness was determined under 300g load on the surface of each specimen. Surface roughness was measured with Computerize Roughness Tester twice as Ra on each specimen and mean roughness value was obtained. After that, 20 rectangular specimens (2x2x25mm) were prepared of each material and the specimens were tested for flexural strength using a three-point bending test with an Instron machine at a crosshead speed of 1mm/min. For statistical analyses, One–way ANOVA, Tukey’s HSD and Scheffe were used. Results: It was observed that Photoposterior and AELITE™All-Purpose exhibited significantly higher bending strength when compared to Compo-HS and Compo-N (p

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