Influence of different restorative techniques on microleakage in Class II cavities with gingival wall in cementum.
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.
Demarco
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FF
Federal University of Pelotas, School of Dentistry, Rua Gonçalves Chaves, 457, Pelotas-RS, Brazil, 96015-560.
Ramos
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OL
Mota
C S
CS
Formolo
E
E
Justino
L M
LM
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
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