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.
