title: Effects of polymerization techniques on uniformity of cure of large-diameter, photo-initiated composite resin restorations.
abstract: The polymerization effectiveness of various methods of exposing large-diameter, light-activated composite resin samples is reported. Results of Knoop hardness testing showed that highest mean hardness was achieved by using a wide tip (13 mm) with either the spot cure or overlap method for 60 seconds. More uniform hardness resulted from the wide-tip with scanning methods and 60-second cure than resulted from the narrow-tip (8 mm) with the spot or overlap method and 20-second cure.
mesh_terms: D017438:Bisphenol A-Glycidyl Methacrylate; D055598:Chemical Phenomena; D002627:Chemistry, Physical; D003188:Composite Resins; D003793:Dental Restoration, Permanent / Q000379:methods*; D006244:Hardness; D008027:Light; D011108:Polymers; D013499:Surface Properties
chemical_list: D003188:Composite Resins; D011108:Polymers; D017438:Bisphenol A-Glycidyl Methacrylate