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Why do we change our toothbrush frequently?

May 19th,2018

Toothbrushes play an important role in the regimen of our dental hygiene. Without toothbrush, it is very difficult to remove germs, debris and other plaque-causing agents present in our mouth. Dentists reveal that your toothbrush will become a source to infect your oral health if you do not replace your toothbrush for every 3 months.

You may also know this or it may be suggested by your dental health specialist. Using an old toothbrush for many months is one of the common dental mistakes done by many people without their knowledge.

In this post, we have explained the important reasons which make replacing toothbrush at regular duration is essential.

1. Old toothbrushes are ineffective

The bristles of a new toothbrush are sturdy enough to clean your teeth. As the bristles constantly rub the teeth when you are brushing, they become frayed and loses their sturdy. It seems like efficient in cleaning your teeth but the bristles become dull.

Such frayed bristles cannot remove the debris present between the small nooks present between the teeth. Such deposition in the teeth will lead to various oral complications and probably result in Tooth loss.

2. Reintroducing Bacteria

When you are brushing, the oral bacteria present in your mouth stick to the bristles. If you do not properly rinse the brush after brushing, it is sure that the bacteria are not still eliminated.

Similarly, we maintain the toothbrush in wet condition. The germs and bacteria present in the bristles take advantage of the moisture and begins to inherit. Thus your toothbrush becomes a habitat of bacteria. Researchers and Dental health Professionals say that approximately 10 million bacteria will present in a toothbrush.

If you use the same toothbrush for more than 3 months, it is sure that the bacteria in the bristles are again transferred to our mouth. Hence it is important to get a new toothbrush to avoid such kind of bacterial infections.


Rinse your brush with clean water after brushing and keep it dry by placing it on up straight position. This will minimize the number of bacteria in the bristles.

3. Erode the teeth enamel

In general, a toothbrush is provided with sturdy bristles having sharp and cut edges. The edges of the bristles are slightly arched in order to make them less abrasive. Thus the sharp bristles clean the teeth without damaging the enamel and gum tissues.

As we us the brush regularly, the bristles lose the dome present in the edges and become very sharp. Such sharp bristles are effective to erode the enamel and bruise the receding gums.

Such enamel erosion and damages in gum tissues will lead to serious complications like Periodontal diseases and require costly dental treatments.

When do you want to change your toothbrush?

You can purchase a new soft-bristled toothbrush when you identify the following signs in the toothbrush you are currently using.

  • The bristles become dull or discolored.
  • Bent out of shape in the bristles
  • The bristles appear dirty or contaminated

Similarly, you need to change your toothbrush once you are recovered from health issues that appear in the mouth like cold, flu and sore throat.


Using the same toothbrush for a long time makes the toothbrush to lose its efficiency in removing bacteria. Bacteria also use the bristles to reside. In such cases, your brushing actions remain neutral even though you brush your teeth more than twice a day. Hence you need to change or replace your old toothbrush with a new one at regular intervals.

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