canities

例句：

1. 1. My dentist is very skilled at fixing cavities.
   我的牙医非常擅长修复龋齿。
2. 2. She has been visiting the dentist regularly for her oral health.
   她定期去看牙医，以保持口腔健康。
3. 3. The dentist recommended a new toothpaste for my cavities.
   牙医推荐了一种新的牙膏来治疗我的龋齿。