National Geographic : 1933 Feb
Remove film-the most important step in saving teeth Y EAR AFTER YEARfilm endan gered this poor tooth. Year after year the neglected molar helplessly resisted. Film formed constantly-and each new coat contained millions of decay germs. One day the acids these germs produced ate through nature's defense-wall of enamel and mo lar's fight was lost. A masterpiece nature had taken years to build a precious tooth-was doomed to come out! What is this film ? What is this film that robs us of our teeth? A slippery, sticky coat ing formed by the mucin in saliva. It stains teeth yellow. It catches bits of food which soon decay. Yes, but that's not all! Film con tains millions of tiny germs. Some are rod-shaped, grouped in clusters. These are decay germs. As they live they give off enzymes that produce lactic acid.This lactic acid dissolves tooth enamel just as other acids eat holes in wool or cloth. Other germs are linked with "trench mouth"- still others with pyorrhea. " What must I do to fightfilm ?" To fight film use Pepsodent in stead of ordinary tooth pastes. Why? Because a tooth paste is only as good as its polishing mate rial-not one bit better. The new polishing material in Pepsodent is one of the great discoveries of the day. Its power to remove every trace of film stain is revolution ary! Its notable distinction of be ing twice as soft as polishing materials in common use has gained wide recognition. Remem ber the one safe way to fight film is to use the special film-removing tooth paste-Pepsodent. Use it without fail twice a day and see your dentist at least twice a year. Pe psodent-i.s the special ilm-removing tooth paste PRESS OF JUDD & DETWEILER. INC. WASHINGTON, D. C. See how rapidly film forms on teeth These teeth were absolutely free of filmat8a. m. At noon-the film wasapplied and this is how they looked. AtSp.m.-thefilm detector*showsstill heavier deposits of film. Two-thirds of the tooth's surface is covered. At 10 p.m.-these same teeth were brushed with Pepsodent. Note howthoroughlyfilm has been removed. - A harmless fluid, used by dentists, which stains film so that the naked eye can see it.