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Comparative study for mechanical properties (wear resistance) of direct posterior restorative composite (hybrid and nanoceramic composite)

دراسة مقارنة لخاصية مقاومة الاهتراء للراتنج المركب الترميمي المباشر الخلفي الهجين و الراتنج المركب ذي الحبيبات الخزفية

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 Publication date 2015
and research's language is العربية
 Created by Shamra Editor




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Introduction :The demand for posterior aesthetic restorations has dramatically increased in recent years. Several new materials have been developed with improved aesthetic, adhesive and mechanical properties. Theoretically, nano-structured dental resin omposites are purported to have increased wear and hardness resistance compared with hybrid composites and may favor the achievement of restoratives with better long-term performance. Aim: The wear resistance of different types of resin composites were evaluated in the in vitro study. Material and methods :Two nanohybrid restorative composites -Tetric®EvoCeram (Ivoclar-Vivadent) and CeramXTM(Dentsply) - were compared with a microhybrid material - Tetric®Ceram (Ivoclar-Vivadent) and hybrid material Spectrom (Dentsply) . wear resistance : fifteen specimens (3x3 mm) of each material were subjected to wear tests . The data were analyzed by 1-way ANOVA(<=0.5). Results : The Tetric®EvoCeram composite resin exhibited significantly less wear than the CeramX and Tetric®Ceram material . Conclusions :In terms of wear resistance, nano-structured composites may perform either similarly or comparatively better than a microfilled and hyprid composite . nanohybrid restorative composites can thus be considered as a good restorative material.



References used
Zeynep Duymus Yesil, DDS, PhD,a Satish Alapati, BDS, PhD,b William Johnston, PhD,c and Robert R. Seghi, DDS, MSd. Evaluation of the wear resistance of new nanocomposite resin restorative materials. J Prosthet Dent 2014;99:435-443
Anderson din,non-metalic denture base materials applied dental materials .5th ed London:Blackwell scientific 1976:248
Bowen RL.Use of epoxy resins in restorative materials.(1956).J Dent Res:360-9
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Regarding the sealing ability of restorative dental materials, this study was done to assess the microleakage of class V cavities restored with a new self-adhesive flowable composite resin and compare to different flowable materials.
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