title: Effects of opacity and oxygen inhibition of coating resin composites on bond strength to enamel.
abstract: The purpose of this in vitro investigation was to study the effects on bond strength to primed human enamel stemming from opacity and polymerization inhibition by oxygen due to two coating resins. The coating resins and primers used were White Coat and an experimental material, SIR. The bond strengths on fine-ground enamel were evaluated for three shades of each of these coating resins after 24-hour storage in water. In addition, their degrees of opacity and oxygen inhibition depths were measured. The mild self-etch primer solutions produced very shallow but distinct etching patterns for micromechanical retention of the coating resin. Significant linear relationships between bond strength on the one hand and opacity and oxygen inhibition depth on the other were found for the three shades of each coating resin. Generally, the bond strength mediated on enamel is sufficiently high when these resins are combined with their proprietary adhesives. Therefore, the decrease in bond strength with increasing opacity of the coating resin shades has to be taken into account during application and light-curing.
authors.affiliation: Department of Clinical Cariology and Endodontology, Showa University School of Dentistry, Kitasenzoku, Ohta-ku, Tokyo, Japan. amanabe@dent.showa-u.ac.jp
authors.forename: Atsufumi
authors.initials: A
authors.lastname: Manabe
authors.forename: Masafumi
authors.initials: M
authors.lastname: Kanehira
authors.forename: Werner J
authors.initials: WJ
authors.lastname: Finger
authors.forename: Hisashi
authors.initials: H
authors.lastname: Hisamitsu
authors.forename: Masashi
authors.initials: M
authors.lastname: Komatsu
mesh_terms: D020099:Coated Materials, Biocompatible / Q000737:chemistry; D003188:Composite Resins / Q000737:chemistry*; D003743:Dental Enamel / Q000737:chemistry*; D045662:Dental Etching / Q000379:methods*; D003764:Dental Materials / Q000737:chemistry; D019232:Dental Restoration Failure; D003799:Dental Stress Analysis; D003801:Dental Veneers; D006801:Humans; D007180:Incisor; D055115:Light-Curing of Dental Adhesives / Q000379:methods*; D008437:Maxilla; D010100:Oxygen / Q000737:chemistry; D033081:Shear Strength; D013499:Surface Properties
chemical_list: D020099:Coated Materials, Biocompatible; D003188:Composite Resins; D003764:Dental Materials; C501421:White Coat tooth coating material; D010100:Oxygen