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Bonding agent is a decisive factor in determining the marginal leakage of dental composites subjected to thermal cycling: an in vitro study
Author(s) -
Mathew M.,
Parameswaran Nair E. K.,
Krishnan V K.
Publication year - 2001
Publication title -
journal of oral rehabilitation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.991
H-Index - 93
eISSN - 1365-2842
pISSN - 0305-182X
DOI - 10.1046/j.1365-2842.2001.00609.x
Subject(s) - composite number , temperature cycling , adhesive , materials science , composite material , leakage (economics) , adhesion , dental bonding , dental composite , thermal , bond strength , layer (electronics) , physics , meteorology , economics , macroeconomics
The marginal leakage at the dentine/composite interface in Class II composite restorations subjected to thermal cycling has been effectively evaluated using the silver staining technique. The presence of a bonding agent at the dentine/composite interface is found to improve adhesion. Scanning electron and optical microscopic observations of sectioned specimens reveal that applying a second coat of bonding agent on the dentinal surface helps in reducing microleakage compared to a single coat application, in all three radiopaque composite/bonding agent systems studied (Z100/Single Bond, Spectrum TPH/Prime & Bond 2·1 and Chitra/Chitrabond 1·0). Thermal cycling during in vitro studies was found to provide a more appropriate representation of the adhesive behaviour of the composite in clinical situations.