1. How often should a toothbrush be replaced?
- A
1 month
- B
2 months
- C
3 months
According to Dr. Doan Hong, Vietnam Institute of Applied Medicine, you should prioritize using a toothbrush with soft bristles; replace the toothbrush every three months. According to research by Bioteca (Korea), after three months, the toothbrush becomes a reservoir for 4 million bacteria, including E-coli in human feces. You can use dental floss before going to bed to remove food and debris between teeth, helping to freshen your breath.
- D
4 months
2. What time of day is best to brush your teeth?
- A
Beginning and end of day
According to Dr. Doan Hong, 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. In fact, saliva helps prevent bacteria from attacking tooth enamel, but saliva production is significantly reduced at night, which makes brushing your teeth before bed important for your oral hygiene routine. Over time, skipping brushing at night can lead to significant damage, including a high risk of plaque buildup on your teeth.
- B
After every meal
- C
Any time of day
Source: https://vtcnews.vn/ban-chai-danh-rang-dung-bao-lau-thi-nen-thay-moi-ar908917.html
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