National Geographic : 1918 Oct
The Errors Made in Tooth Pastes All Statements Approved by High DentalAuthorities Why They Failed The evidence shows that the tooth-brush needs aid Tooth troubles have constantly increased. Millions find that well-brushed teeth still discolor and decay. Modern dentists know the reason. It lies in a film-a slimy film-which brushing does not end. Most tooth trouble finds its source in that film. That film is what discolors - not your teeth. It hardens into tartar. It gets into crevices and stays. It holds food which ferments and forms acid. It holds the acid in contact with the teeth to cause decay. Millions of germs breed in it. They, with tartar, are the chief cause of pyorrhea. So any brushing which omits that film does very little good. Tooth pastes have aimed to remove food debris, or counteract acid, or combat germs. But the cause of tooth troubles lay imbedded in film, where the tooth-brush failed to reach them. Science now has found a way to combat that film. Able authorities have proved it by clinical tests. It is now embodied in a dentifrice called Pepsodent, and we are asking all to prove it by a simple trial test. We Now Use Pepsin That film is albuminous, so Pepsodent is based on pepsin, the digestant of albumin. The object is to dissolve the film, then to constantly prevent its ac cumulation. Ordinary pepsin mixtures cannot serve this pur pose. Pepsin must be activated, and the usual agent is an acid harmful to the teeth. But science has discovered a harmless activating method. Five governments have already granted patents. It is that method, used in Pepsodent, which makes it possible nowadays to keep teeth from film accumulation. Many clinical tests have proved the effects of Pepsodent. They are now beyond possible question. You can prove them yourself, and in one week, if you will make the test. Send the coupon, with 10 cents, for a special trial tube. Use it like any tooth paste and watch results. Note how clean the teeth feel after using. Mark the absence of the slimy film. See how teeth whiten as the fixed film disappears. A short trial will give you a new conception of what teeth-cleaning means. And we do not believe you will ever return to old, inefficient methods. Cut out the coupon now. Return your empty tooth-paste tubes to the nearest Red Cross Station P04Ta< PAT.OFF. I SPECIAL 10-CENT TUBE S|I A size not sold in Drug Stores REG. U.S. I THE PEPSODENT CO. The New-Day Dentifrice I Dept. 222, 1104 S. Wabash Ave., Chicago, Ill. ThEnclosed find O1c. for a Special Tube of Pepsodent. A Scientific Product - Sold by , S- Name.----------------------------------------------- Druggists Everywhere (131) 111111111111111111111111 11111111111111111111 1111111111111111111 Address. -- - - - I. ---- --- .... "Mention the Geographic-It identifies you."