He should see a dentist.

他应该去看牙医。

Her tooth aches, and she needs to see a dentist.

她的牙齿酸疼，需要去看牙医。

My premolar hurts a bit, I need to see a dentist.

我的前臼齿有点疼，我需要去看牙医。

He went to see a dentist because he has a toothache.

他因为牙疼去看了牙医。

If you have a toothache, it's best to see a dentist.

如果你有牙痛，最好去看牙医。

Her tooth is a bit loose and she needs to see a dentist.

她的牙齿有点宽松，需要看牙医。

If your gums bleed when you brush, you should see a dentist.

如果刷牙时牙龈出血，你应该去看牙医。

Youd better see a dentist.

你最好去看看牙医。

So he must see a dentist.

他必须去看牙医。

He should see a dentist and get an X-ray.

他应该去看牙医并且照X光。