Effect of light irradiation time on the mechanical properties of two flowable composites with different initiation systems in bonded and unbonded cavities. Dent Mater J. 2007 Sep;26(5):687-93 Authors: Nayif MM, Nakajima M, Foxton RM, Tagami J Abstract The aim of this study was to evaluate the regional mechanical properties of flowable composites with different initiation …