tooth parts

例句：

1. 1.The dentist examined the patient's teeth parts.
   牙医检查了病人的牙齿部分。
2. 2.The study revealed that tooth parts can be a source of infection.
   研究发现牙齿部分可能是感染的来源。
3. 3. The dentist advised the patient to take care of their tooth parts regularly.
   牙医建议病人定期照顾他们的牙齿部分。