2 sentences

1. 他的门牙有点突出。

   tā de mén​yá yǒu​diǎn tū​chū.

   His front teeth are a bit protruding.

   Source: Dong Chinese Dictionary

2. 他不小心摔了一跤，磕断了一颗门牙。

   tā bù xiǎo​xīn shuāi le yī jiāo, kē​duàn le yī kē mén​yá.

   He accidentally fell and broke one of his front teeth.

   Source: Dong Chinese Dictionary