The device of the demonstration of the effective fluorine in the prevention of dental caries

摘要

The subject of the present invention is a device for demonstrating the effectiveness of fluorine in the prevention of dental caries. A demonstration device comprises a tube 1 containing a solution 2 of dilute acetic acid in which are immersed small tooth-shaped objects, namely A consists of fluorine and B of calcite, the tube being closed by a screw cap 4 provided with a seal 5. IMAGE