• According to ADA (American dental association) toothbrush has to change every three to four months.
  • Always look at the bristles. If they are frayed, they won't clean teeth as thoroughly. 
  • Because children often brush more rigorously than adults, they may need their toothbrushes replaced more often.
  • Also if u were sick with any oral diseases or throat infection you should change the toothbrush once you are fine with the bacteria from old brush might cause the infection again.


  • No matter which type of toothbrush you use, keep it clean. 
  • The American Dental Association recommends rinsing the toothbrush under tap water after you brush to wash away the left out toothpaste and saliva.
  • Then, store the toothbrush in a vertical position, with the bristles positioned so they can air dry.
  • Storing a toothbrush in a closed container can cause bacteria to build up, so it's best to let the bristles of the toothbrush fully dry between each usage. 
  • Also if very particular you can dip the toothbrush for 5 to 10 seconds in boiling water.


  • Some toothbrushes have bristles that change colours to indicate they’ve worn out (a glaring reminder it’s time to buy a new brush).
  • You can also develop the habit of changing your toothbrush with every check-up (provided you see your dentist every six months) and then again midway before the next appointment. 
  • Or try timing the change to the first day of every season, and remember: To every toothbrush, there is a season.