Comparison of the effect of three led light modes and conventional qth curing light on shear bond strength of composite to dentin

ABSTRACT

Objective: Shear bond strength is an important property inherent to the durability of tooth-colored restorative materials namely composite resins. It has been years that halogen light sources have been used for polymerization of composite resins. In recent years Light Emitting Diodes [LED] have been introduced for this purpose. With respect to their longer bulb life, needless of a filter and no heat production, the demand for their use has increased. This study aimed to compare three different LED curing-lights with conventional Quartz Tungsten Halogen [QTH] lights to assess their effects on shear bond strength of composite to dentin