[A comparative study of visible light units].

Abstract

The purpose of this investigation was to examine the performance of 10 V.L.C. units according to the depth of cure of the composite resins by measuring the hardness difference (delta H) on the top and the bottom of cylindrical specimens 2.3 and 4 mm high. According to the results (a) there is a different performance between the units when the depth of cure exceeds the 2 mm (b) the type of composite resin (macrofille or microfille) has a significant influence of V.L.C. unit performance and (c) performance of the two types of V.L.C. units--with and without flexible photocolor--is almost the same.