title: Autoradiographic determination of marginal leakage of a pressed glass ceramic inlay.
abstract: The marginal integrity and microleakage of pressed glass ceramic inlays were evaluated using autoradiography. IPS/Empress ceramic inlays were fabricated for 10 human molar mandibular teeth. After adjusting the inlays, they were etched with 37% phosphoric acid gel for 30 s and silanized with Monobond S for 30 s. Before cementation with dual cure resin cement the inlays and cavity walls were gently covered with a thin layer of bonding agent. When the cementation process was completed the samples were cycled 300 times between a 55 degrees C hot bath and a 5 degrees C cold bath. The samples were placed in each bath for 60 s, with 5 s intervals between immersions, then the specimens were immersed in an aqueous solution of Ca-45. After 24 h the inlay and tooth assemblies were removed, rinsed with water and placed in cold-cured acrylic resin, then sectioned through the long axis for autoradiographic analysis. According to the penetration of Ca-45, the microleakage level was scored for each section. The results indicated slight penetration of Ca-45 on autoradiographic films.
authors.affiliation: Department of Prosthodontics, Faculty of Dentistry, University of Hacettepe, Ankara, Turkey.
authors.forename: R S
authors.initials: RS
authors.lastname: Canay
authors.forename: N E
authors.initials: NE
authors.lastname: Hersek
authors.forename: G
authors.initials: G
authors.lastname: Uzun
authors.forename: M T
authors.initials: MT
authors.lastname: Ercan
mesh_terms: D000134:Acid Etching, Dental; D000180:Acrylic Resins; D000538:Aluminum Silicates / Q000737:chemistry; D001345:Autoradiography; D002132:Calcium Radioisotopes; D002484:Cementation; D002516:Ceramics / Q000737:chemistry; D001840:Dental Bonding; D003737:Dental Cavity Preparation; D003738:Dental Cements / Q000737:chemistry; D003763:Dental Leakage / Q000175:diagnosis*; D018772:Dental Marginal Adaptation; D003776:Dental Porcelain / Q000737:chemistry; D005782:Gels; D005898:Glass / Q000737:chemistry; D006801:Humans; D007101:Immersion; D007284:Inlays; D008334:Mandible; D008963:Molar; D010756:Phosphoric Acids / Q000737:chemistry; D016613:Plastic Embedding; D019275:Radiopharmaceuticals; D019279:Resin Cements / Q000737:chemistry; D012821:Silanes / Q000737:chemistry; D013499:Surface Properties; D013816:Thermodynamics
chemical_list: D000180:Acrylic Resins; D000538:Aluminum Silicates; D002132:Calcium Radioisotopes; D003738:Dental Cements; D005782:Gels; C075815:IPS-Empress ceramic; C076808:Monobond S; D010756:Phosphoric Acids; D019275:Radiopharmaceuticals; D019279:Resin Cements; D012821:Silanes; D003776:Dental Porcelain