parodontitis

例句：

1. 1.He has been suffering from parodontitis for the past two weeks.
   他过去两周一直遭受牙周炎的折磨。
2. 2.The dentist advised him to take antibiotics and get regular dental check-ups to prevent parodontitis.
   牙医建议他服用抗生素并定期进行牙齿检查，以防止牙周炎。
3. 3. Parodontitis can lead to tooth loss if left untreated.
   如果不治疗，牙周炎可能会导致牙齿丢失。