Mutans Streptococci in Plaque from Margins of Amalgam, Composite, and Glass-ionomer Restorations

Abstract

Levels of mutans streptococci in plaque samples from margins of Class II amalgam (Dispersalloy), composite (P-10), and glass-ionomer (Ketac Silver) restorations were compared. Fifty-one children, each having one of the restorations in a permanent first molar, were part of an inter-individual comparison, giving 17 restorations of each material. The age of the children, the age of the restorations, and the salivary levels of mutans streptococci were comparable in the three groups. Another seven children--each having both a composite and a glass-ionomer restoration of the same age placed on contralateral premolar or molar teeth--were part of an intra-individual comparison. The percentage mutans streptococci of total CFU count in plaque was higher on composite (mean 13.7) and amalgam (mean 4.3) than on glass-ionomer (mean 1.1) restorations in the inter-individual comparison, and higher on composite (mean 4.2) than on glass-ionomer (mean 0.4) restorations in the intra-individual comparison. In both comparisons, the differences in values between samples from glass-ionomer restorations and samples from composite or amalgam restorations were statistically significant (p less than 0.05).

Parametric study of the effect of phase anisotropy on the micromechanical behaviour of dentin–adhesive interfaces

“…The premature failure of moderate to large composite restorations can be traced to a breakdown of the bond at the tooth surface-composite material interface (Collins et al 1998;Mair 1998;Nordbo et al 1998) and increased levels of the cariogenic bacteria, Streptococcus mutans, at the perimeter of these materials (Svanberg et al 1990;Dunne et al 1997). The breakdown of this bond has been linked to the failure of our current materials to consistently seal and adhere to the dentin (Meiers & Kresin 1996).…”

Antimicrobial activity of eight root canal sealers before and after setting

“…The result in this study confirmed that alkaline pH produced by Apexit did not exceed this value, thus allowing this microorganism to grow 7) . Glass ionomer cement possess strong antibacterial properties 14,15) , it is mainly due to a fluoride and other ingradients. Ketac Endo is a newly developed glass ionomer-based sealer.…”

Adhesion of Streptococcus Mutans Biofilm on the Surface of Indirect Resin Composites Restorations.

“…Differences in the amount of bacterial adhesion can be explained by the diverse surface characteristics of each type of composite resin. [8][9][10] The success of the esthetic restorations on a long-term basis depends on the quality and amount of adhered biofilm are. The initial adherence and subsequent colonization of bacteria on the surface of composite resins is the key of the pathogenesis of the secondary caries promoted particularly by Streptococcus mutans (S mutans) and Streptococcus sobrinus (S sobrinus) .…”