Varnish and Dental Tubuli Seal
tgvarnish is a Cavity Varnish, applied to the walls of the cavity, reduces the penetration of fluids into the tooth and the subsequent placed restoration.
The penetration of acid from the cement into the dentine, particularly with zinc phosphate and silicate cements, is reduced when tgvarnish is applied over the floor of the cavity but when the layer is thin the thermal protection is inadequate and more than one layer is recommended.
In general it is necessary to use two and sometimes three thin layers of tgvarnish to assure the continuation of the film deposit over the surface of the cavity.
The presence of silicate adjacent to the enamel wall gives an anticariogenic effect.
It is recommended that the varnish not be applied over the enamel in cavities to be restored with this cement.
tgvarnish for cavities can be of value for covering the dentine in shallow cavities to be restored with a silica cement, without damaging the anticariogenic effect.
In the handling of deep cavities, especially when the pulp is exposed, it can be convenient to place a previous protection, with calcium hydroxide, but before the cavity base.