title: Addition of fresh amalgam to existing amalgam: microleakage study.
abstract: The purpose of this in vitro study was to determine whether adhesive lining materials reduce microleakage in amalgam restorations, and to observe the degree of microleakage at the interface between freshly placed (new) and existing (old) amalgam. Forty-eight specimens were used in the experimental groups. The materials used to study microleakage in this investigation were: copal varnish, a dentin bonding agent (Clearfil New Bond), and a 4-META adhesive (Amalgambond). No significant difference in microleakage was found at the interfaces between freshly placed and existing amalgam. Significantly less microleakage was noted in specimens using the 4-META adhesive and the dentin bonding agent as compared to specimens in which no lining material was placed. Significantly less microleakage was noted in specimens using the 4-META adhesive compared to specimens using cavity varnish.
authors.affiliation: New York University College of Dentistry.
authors.forename: C
authors.initials: C
authors.lastname: Leelawat
authors.forename: W
authors.initials: W
authors.lastname: Scherer
authors.forename: J
authors.initials: J
authors.lastname: Chang
authors.forename: A
authors.initials: A
authors.lastname: Schulman
authors.forename: T
authors.initials: T
authors.lastname: Vijayaraghavan
mesh_terms: D000704:Analysis of Variance; D003188:Composite Resins; D003722:Dental Alloys; D003723:Dental Amalgam; D001840:Dental Bonding; D003736:Dental Cavity Lining; D003763:Dental Leakage / Q000517:prevention & control*; D017269:Dental Prosthesis Repair; D017220:Dentin-Bonding Agents; D006801:Humans; D008689:Methacrylates; D008963:Molar; D019279:Resin Cements
chemical_list: C070606:Amalgambond; C029849:Clearfil Bonding Agent; D003188:Composite Resins; D003722:Dental Alloys; D017220:Dentin-Bonding Agents; D008689:Methacrylates; D019279:Resin Cements; C033470:Dispersalloy; D003723:Dental Amalgam