الفهرس 
Composition of Resin CompositesOnly 14 pages are availabe for public view
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Abstract
Composite resins are considered material of choice in restorative dentistry because of the increasing request for high-quality aesthetic outcomes in everyday practice. They have been widely used in the restoration of posterior teeth due to increasing request for aesthetics as well as dramatic advancement in newer generations of adhesive systems and resin composite formulations1. Despite the advancement of restorative materials and techniques in the recent decades, the postoperative sensitivity with composite restorations still presents a challenge for the clinicians2. One of the disadvantages of composite resins is the polymerization shrinkage leading to contraction stresses that could generate stress at the tooth-restoration interface, and whether the stresses exceed the bond strength, gaps would be formed that result microleakage3. Flowable composite resins with low viscose property are easily placed in small cavities and they are expected to present better adaptation with the cavity walls compared to composite resins with higher viscosity. Because of lower filler content, these materials have lower modulus of elasticity and higher polymerization shrinkage compared to conventional composite resin.