title: Effect of metal halide light source on hardness, water sorption and solubility of indirect composite material.
abstract: This study evaluates the effects of a metal halide light source on the post-polymerization properties of the Sinfony indirect composite material. Two polymerization systems were employed: the Hyper LII system, comprising a metal halide polymerization unit, and the Visio system, comprising two proprietary units designed for polymerizing the Sinfony composite. The composite material was polymerized for 60, 120 or 180 s with the LII system. As a control, the composite was polymerized for 15 min with the Visio system. Knoop hardness, water sorption and solubility were determined. The results were analyzed by Dunnett's T3 multiple comparison test (P<0.05). Knoop hardness was greater for polymerization with the LII unit than for that with the Visio system. Water sorption was greater for polymerization with the Visio system than that with the LII unit. For polymerization with the LII unit for 180 s, solubility was significantly reduced as compared with the Visio system. Within the limitations of the current experiment, it can be concluded that the metal halide unit exhibited better polymerizing performance for the composite material than the proprietary units.
authors.affiliation: Department of Crown and Bridge Prosthodontics, Nihon University School of Dentistry and Department of Specialized Dentistry, Nagasaki University Hospital of Medicine and Dentistry, Japan. koizumi@dent.nihon-u.ac.jp
authors.forename: Hiroyasu
authors.initials: H
authors.lastname: Koizumi
authors.forename: Hidetada
authors.initials: H
authors.lastname: Satsukawa
authors.forename: Naomi
authors.initials: N
authors.lastname: Tanoue
authors.forename: Tomohisa
authors.initials: T
authors.lastname: Ogino
authors.forename: Minoru
authors.initials: M
authors.lastname: Nishiyama
authors.forename: Hideo
authors.initials: H
authors.lastname: Matsumura
mesh_terms: D003188:Composite Resins / Q000737:chemistry* / Q000528:radiation effects; D003764:Dental Materials / Q000737:chemistry* / Q000528:radiation effects; D004867:Equipment Design; D006244:Hardness; D006801:Humans; D008029:Lighting / Q000295:instrumentation*; D008422:Materials Testing; D011108:Polymers / Q000737:chemistry / Q000528:radiation effects; D012995:Solubility; D013997:Time Factors; D014867:Water / Q000737:chemistry
chemical_list: D003188:Composite Resins; D003764:Dental Materials; D011108:Polymers; C477352:Sinfony composite resin; D014867:Water