title: Influence of different restorative techniques on microleakage in Class II cavities with gingival wall in cementum.
abstract: This study compared marginal leakage of Class II cavities with gingival margin in cementum using different techniques. Twenty-four recently extracted third molars were used. Proximal standard box cavities were prepared in both mesial and distal surfaces. The gingival margin was located apical to the cemento-enamel junction. All the preparations and restorations were performed by the same operator. Standard cavities were randomly divided into three groups (n = 16) and restored as follow: Group 1-light-cured composite resin; Group 2-self-cured composite resin + light-cured composite resin and Group 3-amalgam + light-cured composite resin. After polishing, the teeth were thermocycled and their gingival margins exposed to dye. Specimens were sectioned and leakage scores observed in accordance with a standard ranking. Data were subjected to statistical analysis (Kruskal-Wallis). Results showed that the amalgam/resin composite combination demonstrated the least leakage.
authors.affiliation: Federal University of Pelotas, School of Dentistry, Rua Gonçalves Chaves, 457, Pelotas-RS, Brazil, 96015-560.
authors.forename: F F
authors.initials: FF
authors.lastname: Demarco
authors.forename: O L
authors.initials: OL
authors.lastname: Ramos
authors.forename: C S
authors.initials: CS
authors.lastname: Mota
authors.forename: E
authors.initials: E
authors.lastname: Formolo
authors.forename: L M
authors.initials: LM
authors.lastname: Justino
mesh_terms: D003188:Composite Resins; D003723:Dental Amalgam; D003737:Dental Cavity Preparation; D003739:Dental Cementum; D003763:Dental Leakage / Q000517:prevention & control*; D018772:Dental Marginal Adaptation; D003793:Dental Restoration, Permanent / Q000379:methods*; D017220:Dentin-Bonding Agents; D005881:Gingiva; D006801:Humans; D008964:Molar, Third; D011897:Random Allocation; D019279:Resin Cements; D012822:Silicon Dioxide; D018709:Statistics, Nonparametric; D015040:Zirconium
chemical_list: D003188:Composite Resins; D017220:Dentin-Bonding Agents; D019279:Resin Cements; C425844:Scotchbond Multi-Purpose Plus; C083568:Z100 composite resin; C078905:Bisfil; D012822:Silicon Dioxide; D003723:Dental Amalgam; D015040:Zirconium