Medicine: So You Brush Your Teeth?

All good Americans brush their teeth, but most of them do it wrong. So says the American Dental Association, which should know. Toothbrushing, announced the Association's Journal last week, should begin as follows: "Keeping the handle firmly grasped in front of the nose, place the brushhead on the chewing surfaces of the upper or lower back teeth. . . . Then, lifting the brush, hit down on the teeth six or seven times, with a punching action."

Some other advice on procedure and equipment:

¶ Having given the chewing surfaces a good stiff bristle-battering, the outsides of teeth and gums should be brushed...

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