Inhibitory Effects of Oolong Tea Extract on Caries–Inducing Properties of Mutans Streptococci

Abstract

The inhibitory effects of oolong tea extract (OTE) on the caries–inducing properties of mutans streptococci were examined in vitro. OTE reduced the rate of acid production by mutans streptococci accompanied with the retardation of growth rate of mutans streptococci, while the action by chromatographically isolated oolong tea polyphenol (OTF6) was weak. On the other hand, both oolong tea products decreased cell surface hydrophobicity of almost all the oral streptococci examined in the present study, and also induced cellular aggregation of Streptococcus mutans, Streptococcus oralis, Streptococcus sanguis or Streptococcus gordonii. In these reactions, OTF6 showed a more pronounced activity than OTE. Furthermore, the oolong tea products inhibited the adherence of mutans streptococci to saliva–coated hydroxyapatite. These results suggest that OTF6 may inhibit bacterial adherence to the tooth surfaces by reducing the hydrophobicity of mutans streptococci, and OTE may inhibit caries–inducing activity of mutans streptococci by reducing the rate of acid production.

The Role of Glucan‐Binding Proteins in the Cariogenicity of Streptococcus mutans

“…The sucrose-independent adherence of strain C1 to salivacoated hydroxyapatites (SHA) was examined by the method of Matsumoto et al (10) and found to be significantly lower than that of strain MT8148 (PϽ0.0001), while A1 showed a similar level of adherence to that of MT8148. Although the dextran-binding activity of strain A1, examined by the method of Lis et al (8), was lower than that of strain MT8148, the difference was not significant.…”

The Effect of Jamblang (Syzygium Cumini (L) Skeels) Leaves Ethanolic Extract on the Adhesion of Streptococcus Mutans to Hydroxyapatite

“…As known that adhesion is important to colonization of microorganisms pathologic. Adhesion of S. mutans to the surface of the tooth is the stage important in the formation of biofilm and led to the development of caries [11,12,13].…”

“…Cell surface hydrophobicity of S. mutans related to surface protein of S. mutans. Polyphenol polymers from plant material can react with surface proteins of S. mutans, causing changes the cell surface hydrophobicity of S. mutans, decline in cellular aggregation and the number of S. mutans attached to hydroxyapatite [11]. The content of eugenyl acetate and polyphenol, namely quercetin, mirisetin, taxifolin, and tannin in Jamblang leaves extract, may play a role in decreasing the number of S. mutans attached to HA [13,15,18].…”

“…The adhesion of S. mutans to the tooth surface is an important step in the formation of dental plaque [11,15]. The first stage of S. mutans adhesion to the tooth surface involves the interaction between the saliva, the bacterial surface, and the tooth surface.…”

Avaliação dos efeitos dos chás de camomila, cidreira e erva doce sobre a fermentação e síntese de polissacarídeos da placa dentária humana. Estudo 'in vitro'

“…A literatura consultada não relata nada sobre a síntese de polissacarídeos com os três chás estudados. Porém quando analisados trabalhos com chá preto, este se mostra inibidor da síntese e conseqüentemente do poder de aderência da placa dentária 17,24,32,35,36,60 .…”