He has a small cavity in his premolar.

他的前臼齿上有一个小洞。

Do you know what the function of a premolar is?

你知道前臼齿的功能是什么吗？

The dentist advised me to regularly check my premolar.

牙医建议我定期检查我的前臼齿。

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。

Absence of more than two first premolars or absence of a first and a second premolar.

缺少超过两个第一前臼齿或者一个第一和一个第二前臼齿.

She has a gold crown on her premolar.

她的前磨牙上有一个金牙冠。

The dentist checked my premolar for cavities.

牙医检查了我的前磨牙是否有蛀牙。

The orthodontist said my premolar needs to be extracted.

矫正牙医说我的前磨牙需要拔掉。

The premolar is located between the canine and the molar.

前磨牙位于犬齿和磨牙之间。

I felt a sharp pain in my premolar when I bit into the apple.

当我咬苹果时，我的前磨牙感到一阵剧痛。