fluorine crown

例句：

1. 1. The fluorine crown is a popular choice for dental treatments.
   氟化物冠冕是牙科治疗的热门选择。
2. 2. The fluorine crown was designed to protect the teeth from decay.
   氟化物冠冕旨在保护牙齿免受蛀牙侵害。
3. 3. The dentist used a fluorine crown to repair her damaged tooth.
   牙医用一个氟化物冠冕修复了她的损坏牙齿。