Electric toothbrush braces). The Broxo Electric Toothbrush was introduced in the U.S. by E. R. Squibb and Sons Pharmaceuticals in 1960. After introduction, it was marketed in the U.S. by Squibb under the names Broxo-Dent or Broxodent. In the 1980s Squibb transferred distribution of the Broxodent line to the Somerset Labs division of Bristol-Myers Squibb. The General Electric automatic toothbrush was introduced in the early 1960s; it was cordless with rechargeable NiCad batteries and although portable, was rather bulky, about the size of a two-D-cell flashlight handle. NiCad batteries of this period suffered from the Memory effect. The GE Automatic Toothbrush came
Electric toothbrush recommend that heads be changed every three to six months at minimum, or as soon as the brush head has visibly deteriorated. Modern electric toothbrushes run on low voltage, 12v or less. A few units use a step-down transformer to power the brush, but most use a battery, usually but not always rechargeable and non-replaceable, fitted inside the handle, which is hermetically sealed to prevent water damage. While early NiCd battery toothbrushes used metal tabs to connect with the charging base, modern toothbrushes use contactless inductive charging: the brush unit and charger stand each contain a coil of wire; when