National Geographic : 1920 Apr
Why That Tartar If You Keep Teeth Clean? All Statements Approved by High Dental Authorities It is Due to Film ARTAR shows that teeth are not kept clean. The basis is a slimy film. If you removed it daily tartar would not form. That film on your teeth causes most tooth troubles. It is ever-present, ever-form ing. You can feel it with your tongue. The film is what discolors, net the teeth. It holds food substance 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. This film is viscous, so it clings. It gets into crevices and stays. The ordinary dentifrice does not dissolve it. The tooth brush leaves much of it intact. That is why the best brushed teeth so often discolor and decay. Every dentist knows this. Dental science has for years sought a way to combat that film. That way has now been found. And, for daily use, it is embodied in a dentifrice called Pepsodent. We ask you to write for a free 10-day Tube and learn what it means to your teeth. Watch It Disappear Get this free tube of Pepsodent and use like any tooth paste. Note how clean the teeth feel after using. Mark the absence of the slimy film. See how the teeth whiten as the fixed film disappears. You will know in a few days what clean teeth mean. Pepsodent is based on pepsin, the digestant of albumin. The film is albuminous matter. The object of Pepsodent is to dissolve it, then to constantly combat it. The way seems simple but for long it seemed impossible. Pepsin must be activated, and the usual method is an acid harmful to the teeth. Then the invention of a harmless activating method made this application possible. And it seems to solve the problem of this tooth-de stroying film. Pepsodent has been proved under able authorities by many clinical tests. Leading dentists all over America have come to endorse and adopt it. Now we urge you to try it. REG. U. S. The New-Day Dentifrice Now advised by leading dentists. Druggists everywhere are supplied with large tubes Send the Coupon for a 10-Day Tube Note how clean the teeth feel after using. Mark the absence of the slimy film. See how the teeth whiten as the fixed film disappears. Compare the results with the methods you now use. Judge for yourself which best protects the teeth. Do this for your sake and your children's sake. Cut out the coupon now. (223) Ten-Day Tube Free THE PEPSODENT COMPANY, Dept. 181, 1104 S. Wabash Ave., Chicago. Ill.: Mail 10-Day Tube of Pepsodent to Name -----. -- ----- ----- ----- ----- ----. . . ... Address ...--------------------- __- "Mention The Geographic-It identifies you"