Although the Mode Toothbrush only has one setting, and a fairly simple bristle head, it’s powerful. With a battery that lasts 30 days on a single charge and a brush rate of 38,000 strokes per minute, ...

The toothbrush may eventually give way to the Orajet, a device developed by Manhattan Dentist Charles L. Hyser (TIME, Feb. 22, 1943). Like many other dentists, Dr. Hyser has long been dissatisfied ...