Question: is tooth polishing necessary at the end of a dental visit?

问：洗牙后抛光牙齿是否有必要？

youdao

A smiling boy arrived home from a dental visit, "Hey mom, the says I have no cavities."

小男孩儿看完牙医，面带微笑地回到家：“嘿，妈妈，牙医说，我一颗蛀牙也没有了。”

youdao

A smiling boy arrived home from a dental visit, Hey mom, the dentist says I have no cavities.

小男孩儿看完牙医，面带微笑地回到家：嘿，妈妈，牙医说，我一颗蛀牙也没有。

youdao

Dentists say children should have their first dental visit at least by the time they are one year old.

VOA: special.2009.03.11