Background: The glass ionomer cements developed by Wilson and Kent have several advantages such as fluoride release, adhesion to mineralized dental tissues and a coefficient of thermal expansion similar to that of tooth structure. In spite of so many favorable properties, its poor mechanical properties, limited indication range and low esthetic value led to the further development of resin-based composites. Cention N is an “alkasite” restorative material which like compomer or ormocer is essentially a subgroup of the composite material class. This new category utilizes an alkaline filler, capable of releasing acid-neutralizing ions.