Microleakage in bonded amalgam restorations using different adhesive materials

Brazilian Dental Journal

Maximiliano Sérgio Cenci²  Evandro Piva²  Fernando Potrich²  Elenita Formolo²  Flávio Fernando Demarco²  John M. Powers¹ 

[1] ,Federal University of Pelotas School of Dentistry Pelotas RS ,Brazil

关键词: bonded amalgam;    microleakage;    bovine teeth;   

DOI  :  10.1590/S0103-64402004000100003

来源: SciELO

【 摘 要 】

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.

【 授权许可】

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