tooth top

例句：

1. 1. She brushed her teeth twice a day to keep them healthy.
   她每天刷牙两次以保持牙齿健康。
2. 2.The dentist examined the tooth top and recommended a filling.
   牙医检查了牙齿顶部并建议填充。
3. 3. The child's tooth top was chipped, so he had to get it fixed.
   孩子的牙齿顶部被磕掉了，所以他不得不去修复它。