睡觉前才刷牙是错误的！
Do you brush your teeth before bed every night? This good habit may be wrong.
Doctor Zou Duohong from Shanghai says something important. Brush your teeth 30 minutes after dinner. It is better for your oral health (口腔健康) than brushing before bed.
For example, you have dinner at 6 p.m. You go to bed at 12 a.m. During this long time, food left in your mouth makes bacteria. The bacteria are bad for your oral health.
So brush your teeth after dinner!