title: Colour changes on curing light-activated anterior restorative resins.
abstract: With many composite resins operators may notice a change in colour after light curing the restoration. Three types of specimen--a disc, a simulated Class III and a veneer--were made using a series of composite resins. Generally, resins became lighter or more translucent on irradiation. This was not only true for a range of resins from a single company but also the extent of the change was brand dependent. For most resins the opacity decreased with curing and most of this change occurred with a 20 seconds cure. The reflectance was approximately 50 per cent greater for resins placed over a white background than on a dark background for the thin disc specimens.
authors.forename: O F
authors.initials: OF
authors.lastname: Makinson
mesh_terms: D003116:Color; D003188:Composite Resins; D003481:Cuspid; D004955:Esthetics, Dental; D007180:Incisor; D008027:Light; D013499:Surface Properties
chemical_list: D003188:Composite Resins