牙復(fù)數(shù)的英語單詞怎么寫

　　He's had his front teeth capped.

　　他包了門牙。

　　The front cog has 44 teeth.

　　前齒輪有44個(gè)齒。

　　I've had one of my teeth crowned.

　　我的一顆牙齒鑲了假齒冠。