title: Study on ceramic coating on the enamel surface using a carbon dioxide laser.
abstract: The aims of this study were to evaluate a new restorative method using a carbon dioxide laser (CO(2)-laser) and to evaluate the acid resistance of teeth. Experimental calcium phosphate glass (CPG) powder and two low melting point ceramics (Finesse and zirconium silicate) were fused to enamel surfaces using a CO(2)-laser at an irradiation intensity of 1.0 watt for 30 seconds with a beam size of 0.49 mm at the focal point. The treated teeth were observed with a scanning electron microscope, and the acid resistance of the treated enamel surfaces was evaluated. The CPG fused successfully to the enamel surface, and the treated enamel surface showed high acid resistance compared with the low melting point ceramics and the non-irradiated surfaces. This system may lead to the development of new restorative methods that do not require the use of bonding agents.
authors.affiliation: Division of Restorative Dentistry, Department of Oral Medicine, Kanagawa Dental College, 82 Inaoka-cho, Yokosuka, Kanagawa 238-8580 Japan. niheitom@kdcnet.ac.jp
authors.forename: Tomotaro
authors.initials: T
authors.lastname: Nihei
authors.forename: Shigeaki
authors.initials: S
authors.lastname: Kurata
authors.forename: Katsura
authors.initials: K
authors.lastname: Ohashi
authors.forename: Kozo
authors.initials: K
authors.lastname: Umemoto
authors.forename: Toshio
authors.initials: T
authors.lastname: Teranaka
mesh_terms: D019342:Acetic Acid / Q000009:adverse effects; D000134:Acid Etching, Dental / Q000379:methods; D000818:Animals; D002118:Calcium / Q000032:analysis; D002130:Calcium Phosphates / Q000737:chemistry*; D002417:Cattle; D002516:Ceramics / Q000737:chemistry*; D020099:Coated Materials, Biocompatible / Q000737:chemistry*; D001840:Dental Bonding / Q000379:methods; D003743:Dental Enamel / Q000648:ultrastructure*; D003764:Dental Materials / Q000737:chemistry*; D003776:Dental Porcelain / Q000737:chemistry; D003793:Dental Restoration, Permanent / Q000379:methods*; D006863:Hydrogen-Ion Concentration; D054020:Lasers, Gas / Q000627:therapeutic use*; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning; D011829:Radiation Dosage; D017640:Silicates / Q000737:chemistry; D013997:Time Factors; D014077:Tooth Erosion / Q000517:prevention & control; D015040:Zirconium / Q000737:chemistry
chemical_list: D002130:Calcium Phosphates; D020099:Coated Materials, Biocompatible; D003764:Dental Materials; D017640:Silicates; D003776:Dental Porcelain; C003784:zircon; C037884:finesse; C023506:Glass ceramics; C020243:calcium phosphate; D015040:Zirconium; D019342:Acetic Acid; D002118:Calcium