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Show 0k YOUR DENTAL I. Q. American Dental Association. V- 1 Ai'C jllx 'tft.-Kw v& -Sy-' ' -. ' t.. j "-.'if:. S QI would like to know how much pressure is used when our teeth bite a piece of steak. A Between 35 to 40 pounds of force is required to chew tenderloin ten-derloin beef steak; 40 to 60 pounds to chew chuck beef bteak and from (10 to 80 pounds to chew the common com-mon "boarding house" or "garden variety" of beef steak. The instrument instru-ment used to measure the bite strength is known as a gnathodyna-mometer gnathodyna-mometer (nath'-o-di-nam-om'-et-er) a bite strength measure. The force of the bite or the pounds force with which the jaws may be closed upon any object varies greatly among dif-, dif-, ferent persons. The late Dr. A. D. Black reports that in a tabulation of bite tests made by 1,000 . young adults the average force exerted was 171 pounds on the molar teeth, less on the bicuspids and incisors. The average eight year old with healthy teeth will exert about 35 pounds pressure with his first permanent per-manent molars; the 12 year old, 75 pounds; 18 year old, 140 pounds; and adults 170 to 175 pounds. . A considerable con-siderable number of young., adults have registered as much i as 350 pounds. . ... . Good teeth are essential to good service In our armed forces. They are equally an asset In civil life. Today, that is doubly true, for in every sense we must be fit to fight. We are all In the service. This is no time to indulge the luxury of ills and especially ills caused by bad teeth, that can readily be remedied. atna questions witn seit-aoaressea, stamped envelope, to American Dental Association, 212 East Superior street, Chicago, 111. . V. |