Knoop Microhardness Mapping Used to Compare the Efficacy of LED, QTH and PAC Curing Lights

Abstract

Clinical Relevance The output of a curing light measured at a distance of 0 mm is a poor indicator of how much light energy will be delivered to a restoration in the mouth. When used for manufacturers' suggested curing times and at clinically relevant distances, some curing lights deliver much less energy than is recommended (<10J/cm2) and produce softer composites.