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KLAS ı ı KOMPOZıT RESTORASYONLARıN APROKSIMAL V E PULPAL YÜZEYLERININ MIKROSERTLIĞININ İN VİTRO OLARAK İNCELENMESI

MICROHARDNESS OF T H E APPROXIMAL AND PULPAL SURFACES IN CLASS ı ı COMPOSITE RESTORATIONS:AN IN VITRO STUDY

Journal Name:

  • İstanbul Üniversitesi Diş Hekimliği Fakültesi Dergisi

Publication Year:

  • 2008

Key Words:

Keywords (Original Language):

Author NameUniversity of AuthorFaculty of Author
Abstract (2. Language): 
The aim of this in vitro study was to examine the surface microhardness of composite resin materials when placed in class II cavities using two different matrix systems (Quickmat, Polydentia and Lucifix, HaweNeos). A hybrid composite (Tetric EvoCeram-Ivoclar Vivadent), two nanohybrid composites (Grandio-Voco, Synergy D6-Coltene/Whaledent) and a nanofil composite (Filtek Supreme X T - 3M Espe) were placed in the silicon dublicates of class II cavities which were primarly prepared in plastic teeth without levels (4x4x4) mm (n=160). The cavity was prepared in plastic teeth (4mm bucco-lingual x 4 mm depth x 3mm mesio-distal) ( KaVo,EWL model). Cavosurface margins were not beveled. The impressions of the tooth with the cavity preparation were taken using polyvinyl siloxan(Speedy/PuttyLigth-Coltene). A silicon material (AffinisPrecious-Coltene) was injected in the impressions and a silicon mold of the teeth and the cavity were obtained. The prepared silicon teeth were mounted in plastic jaw (KaVo,EWL model) to simulate proximal contact. Metal sectional matrix (Quickmat-Polydentia) (n=20) and clear matrix system (Lucifix-HaweNeos) (n=20) were prepared for each tooth. Wedges were used to stabilize the matrix. The cavities were restored incrementally in oblique layers with all four restorative materials. And each increment was light cured for 40 s (Celalux-Voco). The restorations were then removed from the cavities and surface hardness of the proximal and axio-pulpal surfaces were immediatly measured with Microhardness Vickers Test device (Cleme x CMT 7, Clemex Labs.). Data were statistically analyzed with one way ANOVA and Tukey's Multiple Comprassion test. No significant differences were found between metal matrix and clear matrix (p>0.05). Microhardness of axio-pulpal surfaces were found significantly lower than the proximal surfaces for each restorative materials (p<0.05). Metal or clear matrix systems both could be used in the class II cavities in regard the surface microhardness of composite resins materials.
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Abstract (Original Language): 
Bu in vitro araştırmada, iki ayrı matriks sistemi kullanılarak hazırlanan Klas II kompozit restorasyonların aproksimal ve pulpal yüzeylerinin mikrosertlik değerleri karşılaştırılmıştır. Plastik çenelerdeki alt büyük azı dişlerine 4x4x4 mm'lik kaviteler açılıp (n=160) dişlerin silikon duplikatları hazırlanmıştır. Kavitelere Tetric EvoCeram, Grandio, Synergy D6, Filtek Supreme X T kompozit restoratif materyaller, metal matriks sistemi (Quickmat, Polydentia) ve şeffaf matriks sistemi (Lucifix, Hawe Neos) kullanılarak uygulanmıştır. Yüzeylerin mikrosertlikleri Vickers Mikrosertlik Test cihazı ile ölçülmüştür ve verilerin istatistik analizleri One Way ANOVA ve Tukey's çoklu karşılaştırma testleri kullanılarak yapılmıştır. Metal ve şeffaf matriks kullanılan gruplar arasında istatistiksel olarak fark yoktur (p>0,05). Pulpal ve aproksimal yüzeyler karşılaştırıldığında ise, aproksimal yüzeyin mikrosertliğinin pulpal yüzeyden istatistiksel anlamlı olarak daha yüksek olduğu saptanmıştır (p<0,05). Klas II kompotit restorasyonların ara yüzeyleri mikrosertlik açısından değerlendirildiğinde metal veya şeffaf matriks sistemler arasında fark bulunmamıştır.
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