Grossman, E. S.Sparrius, O.2022-02-082022-02-081986Grossman, E. S. and Sparrius, O. 1986. Marginal adaptation in composite resin restored dentine cavities Showing gross marginal leakage. Elektronmikroskopieveriniging van Suidelike Afrika, 16: 41-42.https://hdl.handle.net/10539/32705MRC/ University of the Witwatersrand Dental Research Institute, JohannesburgThe aim of bonding composite resin restorations to the tooth is to ensure retention and also to prevent marginal leakage at the tooth restoration interface, a process which can lead to further caries. An in vitro marginal leakage study' of composite resins in combination wTEh acid' etching and dentine and enamel bonding agents highlighted the lower sealing potential of both enamel and dentine bonding agents to dentine (36%>seal) compared to enamel (79%>seal). Several studies 2-4 suggest that if the inner surface of the resin restoration appears as a well replicated negative impression of the adjacent tooth surface, bonding has been achieved. This study was undertaken to examine the appearance of the inner surface of resin restorations which showed gross marginal leakage in restored dentine cavities to determine the degree of marginal adaptation between the restoration and cavity surface.enSurface PropertiesRhodaminesMicroscopy, Electron, ScanningArticle