De novo glucan synthesis by mutans streptococcal glucosyltransferases present in pellicle promotes firm binding ofStreptococcus gordoniito tooth surfaces

Adherence of 3H-labelled cells of Streptococcus gordonii and Streptococcus milleri to artificial pellicles prepared from saliva supplemented with glucosyltransferases from mutans streptococci was examined using a new assay for sucrose-dependent cell-to-pellicle attachment. Results indicate that S. gordonii, but not S. milleri, could attach tightly to hydroxylapatite surfaces through de novo glucan synthesis by mutans streptococcal glucosyltransferases present in the experimental salivary pellicles.