Microleakage in bonded amalgam restorations using different adhesive materials.
The aim of this study was to verify the ability of different adhesive materials to prevent microleakage in bonded amalgam restorations. Standard cavities were prepared in both buccal and lingual surfaces of 35 bovine incisors. The gingival wall was located in cementum/dentin and the occlusal wall in enamel. Teeth (n=35) were divided into 5 groups, according to material employed (one glass-ionomer cement, two resin cements, one adhesive system, and Copalex varnish as a control). Following restoration, the teeth were submitted to thermal cycling. The teeth were subsequently immersed in methylene blue dye and sectioned to allow assessment of microleakage. Non-parametric statistical analysis indicated that all materials demonstrated less leakage than the control group (p<0.01). No leakage was found using the resin-modified glass-ionomer cement, which was significantly different from the other adhesive materials (p<0.05). Leakage in enamel was lower than in cementum/dentin margins. It was concluded that bonded amalgam was an effective technique, since all materials prevented microleakage in enamel and cementum/dentin, when compared to the control group, except Panavia in cementum/dentin margins.
Cenci
Maximiliano Sérgio
MS
School of Dentistry, Federal University of Pelotas, Pelotas, RS, Brazil.
Piva
Evandro
E
Potrich
Fernando
F
Formolo
Elenita
E
Demarco
Flávio Fernando
FF
Powers
John M
JM
D000818:Animals; D017438:Bisphenol A-Glycidyl Methacrylate / Q000737:chemistry; D002417:Cattle; D004396:Coloring Agents; D003723:Dental Amalgam / Q000737:chemistry*; D001840:Dental Bonding; D003737:Dental Cavity Preparation; D003739:Dental Cementum / Q000648:ultrastructure; D003743:Dental Enamel / Q000648:ultrastructure; D003763:Dental Leakage / Q000145:classification*; D003764:Dental Materials / Q000737:chemistry*; D003793:Dental Restoration, Permanent; D003804:Dentin / Q000648:ultrastructure; D017220:Dentin-Bonding Agents / Q000737:chemistry; D005899:Glass Ionomer Cements / Q000737:chemistry; D007180:Incisor; D008422:Materials Testing; D008689:Methacrylates / Q000737:chemistry; D008751:Methylene Blue; D010710:Phosphates / Q000737:chemistry; D011092:Polyethylene Glycols / Q000737:chemistry; D011109:Polymethacrylic Acids / Q000737:chemistry; D011897:Random Allocation; D019279:Resin Cements / Q000737:chemistry; D012116:Resins, Plant / Q000737:chemistry; D013696:Temperature
C112274:Clearfil Liner Bond 2; D004396:Coloring Agents; D003764:Dental Materials; D017220:Dentin-Bonding Agents; D005899:Glass Ionomer Cements; D008689:Methacrylates; C093719:Panavia TPN-S; D010710:Phosphates; D011109:Polymethacrylic Acids; C462240:RelyX ARC; D019279:Resin Cements; D012116:Resins, Plant; C067790:Vitrabond; D011092:Polyethylene Glycols; D017438:Bisphenol A-Glycidyl Methacrylate; D003723:Dental Amalgam; C041292:copal rosin varnish; D008751:Methylene Blue