[Varnishes and adhesives in the seal of silver amalgam restorations].

The object of this paper is to evaluate the marginal filtration occurring between restoration/teeth in cavities filled with silver alloy when using different cavity varnish and adhesives. In 50 teeth removed as a result of decay, cavities were prepaired on vestibular faces and were divided into 5 equal groups: Group A: with no caviti varnish; Group B: two coats of a linkin agent (Scotch Bond 3M); Group C: an amalgam liner base (Voco); Group D; two coats of copal varnish: Group E: an amalgam bond base (Carl San Remo, Germany). All groups were filled with a silver alloy.

[Adherence test in relation to caries activity].

The amount of streptococcus mutans in saliva has been suggested as a way of estimating caries activity (Klock; Krasse, 1979; Newbrum et al 1984; Sabelli, 1985; Thylstrop; Fejerskov, 1988). This study was carried out no evaluate the relationship between an adherence test (formation of streptococcus mutans colonies which allows to group individuals according to level of risk) with the caries activity was determine in 137 children and samples of saliva (0.1 ml) were obtained from each of them.