A device for demonstration in the form of the aquarium the effectiveness of 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 of the invention comprises a receptacle containing at solution 12 of dilute acetic acid in which are immersed small objects 13 A, B in the shape of teeth, one A of the objects being a mineral substance which cannot be attacked by carbonic acid, the other B incorporating calcite CO3Ca; the receptacle is closed by a lid 14. IMAGE