1. The head of toothbrush should be obtuse type. Don’t buy those toothbrush with square or triangle head. The recommended toothbrush head have length of 2.5-3.2cm, width of 0.8-1cm, toothbrush head with 2-4 lines of bristles, each line 5-12 bunches of toothbrush bristle.
  2. The bristle should have same height. Many popular toothbrush have curved bristle like middle short. But sometimes, this kind of toothbrush bristle can’t remove dental plaque completely.
  3. The more bunches of bristle of the toothbrush have, the better the toothbrush is. More bunches of toothbrush bristle improve the clean effective.
  4. Toothbrush bristle can’t be too hard or too soft. Press on the toothbrush bristle, if it’s thorn, don’t use it, if it’s too soft, don’t use it either.
  5. Have angle between handle and bristle. Toothbrush handle should match your hand shape, then the strength will be well controlling. The angle will be good at 17o-20o.