The Effect of Sodium Fluoride on the Rate of Acid Production of Surface Aggregates of Streptococci and Lactobacilli

Abstract

SYNOPSIS IN INTERLINGUA

LE EFFECTO DE FLUORURO DE NATRIUM SUPER LE RAPIDITATE DEL PRODUCTION DE ACIDO IN AGGREGATOS SUPERFICIAL DE STREPTOCOCCOS E LACTOBACILLOS.—Le modification del pH in le curso del tempore esseva registrate quando aggregatos superficial del duo mentionate organismos fermentava solutiones de glucosa con un contento de fluor in varie concentrationes. Le presentia de fluoruro reduceva marcatemente le production de acido, e calculationes pareva indicar que isto esseva le effecto de non-dissociate acido fluorhydric. Le concentrationes de fluor que inhibiva le crescentia a differente nivellos de pH esseva determinate, e le concentrationes de non-dissociate acido fluorhydric esseva calculate. Le concentrationes inhibitori de fluor declinava quando le aciditate cresceva, sed le concentrationes de non-dissociate acido fluorhydric cresceva usque a un maximo attingite a un pH de 5,6 ad 5,4 e postea declinava de novo.

Get full access to this article

View all access options for this article.

References

Volker, J.F. Solubility of Fluorosed Enamel and Dentine , Proc. Soc. exp. Biol., 43:643-45, 1940.

Wright, H.D. The Effect of Iodoacetic Acid, Fluoride, Phloridzin and Phenol on Bacterial Fermentation : a Further Consideration of the Fermentation of Disaccharides, J. Path. Bact., 45:117-29, 1937.

Bibby, B.G. , and Van Kesteren, M. The Effects of Fluorine on Mouth Bacteria , J. dent. Res., 19 :391-402, 1940.

Stralfors, A. Investigations into the Bacterial Chemistry of Dental Plaques, Odont. Tidskr., 58:150-341, 1950.

Roberts, M.H. , and Rahn, O. Antisepsis and Ionisation of Sodium Fluoride , J. Bact., 52:612-13, 1946.

Shiota, T. Effect of Sodium Fluoride on Oral Lactobacilli Isolated from the Rat , J. dent. Res., 35:939-46, 1956.

Stephan, R.M. Intra-oral Hydrogen-ion Concentrations Associated with Dental Caries Activity, J. dent. Res., 23:257-66, 1944.

Stephan, R.M. , and Hemmens, E.S. Studies of Changes in pH Produced by Pure Cultures of Oral Micro-organisms. I. Effects of Varying the Microbic Cell Concentration, J. dent. Res., 26:15-24, 1947.

Sims, W. Measurement of the Rates of Acid Production of Surface Aggregates of Lactobacilli, Streptococci and Some Other Oral Micro-organisms, Brit. dent. J., 119:22-28, 1965.

10.

Dawes, C. , Jenkins, G.N. , Hardwick, J.L. , and Leach, S.A. The Relation between the Fluoride Concentrations in the Dental Plaque and in Drinking Water, Brit. dent. J., 119:164-67, 1965.

11.

Gedalia, I. , and Kalderon, S. Fluoride in the Surface Enamel of Teeth from the Same Mouth, J. dent. Res., 43:44-49, 1964.

12.

Gray, J.A. , Francis, M.D. , and Griebstein, W.J. Chemistry of Enamel Dissolution. In Chemistry and Prevention of Dental Caries, chap. 5, R. F. Sognnaes , editor. Springfield, Charles C Thomas, 1962, p. 162.