National Geographic : 1918 Sep
Why Teeth Lose Their Glitter All Statements Approved by High Dental Authorities You Leave the Film Why do well-brushed teeth discolor and decay? Why does tartar form? Why does pyorrhea start? Millions of people are asking those questions, and the answer is this: A slimy film constantly forms on your teeth. It clings to the teeth. It gets into crevices, hardens and stays, and your brushing doesn't remove it. And most tooth troubles are due to that film. That film is what discolors-not your teeth. It hardens into tartar. 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, and many internal troubles are due to them. These facts have been known for years. But dental science found no way to effectively combat the film. A vigorous dental cleaning from time to time was needed to remove it. Now a way has been found to combat it. That way is embodied in a dentifrice called Pepsodent. You can prove it, as thousands have, by a simple one-week test. This is to urge that you do it-at our cost. Return your empty tooth paste tubes See the Difference Pepsodent is based on pepsin, the digestant c. albumin. The film is albuminous matter. The object is to dissolve the film,, then. to constantly prevent its accumulation. Ordinary pepsin will not serve. It must be acti vated, and the usual agent is an acid harmful to the teeth. But science has now found a harmless activating method. Five governments have already granted patents. That method, employed in Pepsodent, makes teeth-cleaning vastly more effective. Able authorities have made clinical tests of Pep sodent. In thousands of cases they have watched its efficiency. Now we are urging all people to prove it in their homes. It means results you do not get without it, and they are all-important. Send the coupon for a One-Week tube. Use it like any tooth paste. Note how clean your teeth feel after using. Mark the absence of the slimy film. See how teeth whiten as the fixed film dis appears. That film is your teeth's chief enemy. One week will show you that you can combat it. Then you will always clean your teeth, we think, in this scien tific way. Cut out the coupon now. to the nearest Red Cross Station SPAT.OFF. REG. U. S. The New-Day Dentifrice A Scientific Product-Sold by Druggists Everywhere (136) IiiiII i I i iiiiiiiiii111111111 11111111111111111111111 i illlllllll I Ill SOne-Week Tube Free I THE PEPSODENT CO., [ I Dept. 204, 1104 S. Wabash Ave. | Chicago, Ill.: [ I Mail One-Week Tube of Pepsodent to I I I Name . ----------------------------------- ---------- SAddress Address-----------------------------------............- "Mention the Geographic-It identifies you."