Glass

One of Supertooths innovative teaching aids is a simple glass model of a fissure inside chewing surfaces where over 80% of cavities occur from acid demineralisation where carbohydrate like sugar in food trapped at every meal or snack, is changed to acid by resident plaque bacteria. All cavities occur from acid demineralisation that exceeds saliva and fluoride remineralisation where food left on teeth.

Two identical pieces of square glass with sharp edges removed by rubbing with a fine stone or old diamond drill from the dentist and each square are clamped together with a Celco fold back paper clip.

Place a drop of red or blue food dye on the groove and see how surface tension sucks the dye in under capillary action.

Brush with toothpaste showing that brushing and toothpaste have no access.

Push into chewing gum which has no access.

Push into half a grape, a slice fruit like an orange which will displace the red dye. A piece of celery will also displace the dye after more chewing. Chewing celery after eating forces saliva inside pits anf fissures to neutralise acid and remineralise demineralised teeth.

You can see the glass model on YouTube http://www.youtube.com/watch?v=nRca_whVI4Y

Make your own glass model of a fissure and film your experiment and post it on YouTube.

Grinding the centre of one edge on one side of each square at about 30 or 40 degrees so when these sides of, they form a groove similar to a fissure in a tooth and food is trapped more easily.