title: Secondary caries formation in vitro around glass ionomer-lined amalgam and composite restorations.
abstract: The aim of this in vitro secondary caries study was to examine the glass-ionomer liner's effect on wall-lesion inhibition when a conventional and a light-cured glass ionomer liner was placed under amalgam and composite resin restorations. Class V preparations in extracted upper premolars were used and ten restorations were used for each of the following groups: (i) two layers of copal varnish and amalgam; (ii) conventional glass-ionomer and amalgam; (iii) light-cured glass-ionomer and amalgam; (iv) bonding agent and light-cured composite resin; (v) conventional glass-ionomer, bonding agent and light-cured composite resin; (vi) light-cured glass-ionomer, extended 0.3 mm short of the enamel margin bonding agent and light-cured composite resin; and (vii) light-cured glass-ionomer, extended 1 mm short of the enamel margin, bonding agent and light-cured composite resin. The teeth were thermocycled and artificial caries were created using an acid-gel. The results of this study showed that artificial recurrent caries can be reduced significantly (P < 0.05) with a glass-ionomer liner under amalgam restorations. The results also showed that when the light-cured glass-ionomer liner was placed 0.3 mm from the cavosurface margin under composite resin restoration, the artificial recurrent caries reduced significantly (P < 0.05).
authors.affiliation: Aristotle University of Thessaloniki, Dental School Department of Operative Dentistry, Greece.
authors.forename: P
authors.initials: P
authors.lastname: Dionysopoulos
authors.forename: N
authors.initials: N
authors.lastname: Kotsanos
authors.forename: Y
authors.initials: Y
authors.lastname: Papadogianis
mesh_terms: D000143:Acids; D001641:Bicuspid; D003188:Composite Resins; D003723:Dental Amalgam; D001840:Dental Bonding; D003731:Dental Caries / Q000209:etiology* / Q000517:prevention & control; D003736:Dental Cavity Lining; D003737:Dental Cavity Preparation / Q000145:classification / Q000379:methods; D003743:Dental Enamel / Q000648:ultrastructure; D003764:Dental Materials; D003793:Dental Restoration, Permanent / Q000145:classification / Q000379:methods; D005782:Gels; D005899:Glass Ionomer Cements; D006801:Humans; D007764:Lacquer; D012008:Recurrence; D012116:Resins, Plant; D013816:Thermodynamics
chemical_list: D000143:Acids; D003188:Composite Resins; D003764:Dental Materials; D005782:Gels; D005899:Glass Ionomer Cements; D012116:Resins, Plant; C023806:Copalite; D003723:Dental Amalgam