How many times a day should I brush my teeth?

1. How many times a day should I brush my teeth?

• A

  1

• B

  2

  According to Dr. Doan Hong, Vietnam Institute of Applied Medicine, most experts and dentists recommend that people brush their teeth twice a day with toothpaste (containing fluoride), for two minutes each time. You should also not brush your teeth more than three times a day because too much can wear down the enamel. The best time to brush your teeth is at the beginning and end of the day, but many people skip or often forget at night.
  Saliva actually helps prevent bacteria from attacking tooth enamel, but saliva production is significantly reduced at night, which makes brushing before bed important to your oral hygiene routine.
  Over time, skipping brushing at night can lead to significant damage, including a higher risk of plaque buildup on teeth. So brushing once a day is not enough to maintain good oral hygiene. Studies show that it only takes about 4-12 hours for plaque to start forming on teeth. The longer bacteria stay on teeth, the more dental problems they cause. Some potential side effects of brushing only once a day include tooth decay, gum disease, and chronic bad breath.

• C

  3

2. How often should you change your toothbrush?

• A

  2 months

• B

  3 months

  If you tend to forget to brush your teeth before bed, brush your teeth right after dinner. You should use a soft-bristled toothbrush; replace it every three months.
  According to a study by Bioteca (Korea), after three months, toothbrushes become a breeding ground for 4 million bacteria, including E-coli in human feces. You can floss before going to bed to remove food and debris between teeth, helping to freshen your breath.

• C

  4 months

• D

  5 months

Nhu Loan

Source: https://vtcnews.vn/nen-danh-rang-bao-nhieu-lan-moi-ngay-ar904189.html