title: Bonding mechanism of Compoglass to dentin in primary teeth.
abstract: This study evaluated the bonding mechanism of Compoglass compomer to dentin in primary teeth. Buccal or labial dentinal surfaces of 20 human extracted, non carious primary teeth stored in 4 degrees C physiological saline solution were obtained by grinding on silicon carbide paper (final grit 600). The specimens were divided into two groups of 10 teeth each: (1) unetched dentin, Compoglass SCA, Compoglass; and (2) dentin etched with 10% phosphoric acid (Etch-AII), Compoglass SCA, Compoglass. The Compoglass SCA and Compoglass compomer were placed according to the instructions of the manufacturer, except Group 2 were the dentin was first etched with 10% phosphoric acid for 30 seconds. Twenty-four hours after placing the compomer over the treated dentinal surface, the specimens were dehydrated with a series of alcohol and freon. Then critically point dried. The specimens were split with a chisel and the compomer/dentin interface evaluation was performed with the SEM. The results showed that when the instructions of the manufacturer were followed (Group 1) the compomer showed a very close relation to the dentin with some tag structures penetrating the dentin. When phosphoric acid etching preceded the compomer placement a hybrid layer with tags penetrating the dentin was noted in most specimens.
authors.affiliation: Department of Pediatric Dentistry, University of Texas Health Science Center at San Antonio 78284-7888, USA.
authors.forename: F
authors.initials: F
authors.lastname: Garcia-Godoy
authors.forename: Y
authors.initials: Y
authors.lastname: Hosoya
mesh_terms: D000134:Acid Etching, Dental; D003188:Composite Resins; D001840:Dental Bonding; D003793:Dental Restoration, Permanent / Q000379:methods; D003804:Dentin / Q000737:chemistry* / Q000648:ultrastructure; D003806:Dentin Permeability; D017220:Dentin-Bonding Agents; D005069:Evaluation Studies as Topic; D005899:Glass Ionomer Cements; D006801:Humans; D008855:Microscopy, Electron, Scanning; D014094:Tooth, Deciduous
chemical_list: C105428:Compoglass; D003188:Composite Resins; D017220:Dentin-Bonding Agents; D005899:Glass Ionomer Cements