the.com/electric toothbrush
A tiny motor doing the job your wrist was always too lazy for.
means A battery- or charger-powered toothbrush whose bristles vibrate or rotate automatically to clean teeth with less manual effort.
from The toothbrush itself dates back centuries, but the electric version is a 20th-century product of the same impulse that gave us the washing machine and electric razor — motorizing a chore. The first patents and commercial models emerged in the mid-1900s, with Switzerland and the US both credited with early entries, and the technology later picked up oscillating and sonic (ultrasonic-vibration) refinements as dental-hygiene marketing and battery miniaturization matured.
- invented
- switzerland, 1954, for people with no motor control
- bristle speed
- up to 30000 strokes per minute
- real edge
- timer forces full two minutes, not better bristles
- overbrushing risk
- can wear enamel if you press too hard