gingivitis

例句：

1. 1.She had a toothache and went to the dentist for treatment.
   她牙痛，去牙医那里治疗。
2. 2.The dentist advised her to brush her teeth twice a day.
   牙医建议她每天刷牙两次。
3. 3. Gingivitis is a common condition that can lead to tooth loss if left untreated.
   牙龈炎是一种常见的状况，如果不治疗可能会导致牙齿脱落。