title: Silica film coating method for veneering resin composite.
abstract: The preceramic polymer perhydropolysilazane (PHPS) is an attractive candidate as a coating material to prevent discoloration of veneering resin composites. At the present time, however, a practical method to apply this material is not available. The purpose of this study was to establish a low-temperature method for applying a silica film coating to a veneering resin composite. Two types of PHPS, NP and NL, were coated onto a veneering resin composite. The specimens were exposed to hydrogen peroxide vapor at 97°C, and the state of the conversion process was evaluated using FT-IR. With exposure to the hydrogen peroxide vapor, a 0.5-µm-thick silica film similar to that produced by baking was formed on the surface of the NP samples in 10 min, while a 0.2-µm-thick film was formed on the NL in 15 min. The silica coating method described in this study may mitigate the discoloration of veneering resin composite.
authors.affiliation: Division of Restorative Dentistry, Department of Oral Medicine, Kanagawa Dental College, 82 Inaoka-cho, Yokosuka, Kanagawa 238-8580, Japan.
authors.forename: Takahiro
authors.initials: T
authors.lastname: Tanaka
authors.forename: Koji
authors.initials: K
authors.lastname: Hanaoka
authors.forename: Masuji
authors.initials: M
authors.lastname: Yamaguchi
authors.forename: Toyohiko
authors.initials: T
authors.lastname: Shindo
authors.forename: Karl-Heinz
authors.initials: KH
authors.lastname: Kunzelmann
authors.forename: Toshio
authors.initials: T
authors.lastname: Teranaka
mesh_terms: D020099:Coated Materials, Biocompatible / Q000138:chemical synthesis / Q000737:chemistry*; D003116:Color; D003188:Composite Resins / Q000737:chemistry*; D047248:Crown Compounds / Q000737:chemistry*; D003764:Dental Materials / Q000737:chemistry*; D003801:Dental Veneers; D006801:Humans; D006859:Hydrogen / Q000032:analysis; D006861:Hydrogen Peroxide / Q000737:chemistry; D008422:Materials Testing; D018613:Microscopy, Confocal; D009584:Nitrogen / Q000032:analysis; D016877:Oxidants / Q000737:chemistry; D044367:Phase Transition; D012825:Silicon / Q000737:chemistry*; D012822:Silicon Dioxide / Q000138:chemical synthesis / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared; D013499:Surface Properties; D013696:Temperature; D013997:Time Factors; D014835:Volatilization
chemical_list: D020099:Coated Materials, Biocompatible; D003188:Composite Resins; D047248:Crown Compounds; D003764:Dental Materials; D016877:Oxidants; C503683:Prossimo; C541372:perhydropolysilazane; D012822:Silicon Dioxide; D006859:Hydrogen; D006861:Hydrogen Peroxide; D009584:Nitrogen; D012825:Silicon