The first electric toothbrush was developed in 1939 in Scotland, but did not appear on the open market until the 1960s, when it was marketed as the Broxodent in the United States by Squibb.[citation needed] In 1961, General Electric introduced a rechargeable cordless toothbrush that moved up and down when activated.[citation needed]
In 1987, the first rotary action toothbrush for home use, the Interplak, appeared in shops for the general public.[citation needed] There are currently many different varieties of model that use this mechanism. Research shows that they tend to be somewhat (but not extremely) more effective at removing plaque and preventing gingival bleeding than manual toothbrushes and vibrating toothbrushes.
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