Abstract
The bacterial population in the dentogingival area under a calculus splint was examined.
Streptococcus salivarius with urease activity decreased and granular organisms (A. viscosus) increased significantly.
The dry weight of the deposition decreased significantly.
There was no viable count of cariogenic bacteria, Streptococcus mutans either before or after wearing the calculus splint.
Therefore, although the glicolitic bacteria increased when the calculus splint was worn and the local PHdecreased, there is no fear of suffering from dental caries.
The ratio of Streptococcus mutans to total Streptococcus was measured at various times after a 10% glucose rinse.
Streptococcus mutans could be counted only rarely on the labio-lingual surface of the anterior teeth, but in the pits and fissures of the molars, the maximum ratio was measured between 5 and 15 minutes after rinsing after 30 minutes there was a sharp decrease and after 60 minutes the ratio was gradually returning to the initial ratio.
