冠周炎

例句：

1. 1. He had a toothache and went to the dentist for treatment.
   他牙痛，去看了牙医治疗。
2. 2. The doctor diagnosed her with gum disease, which required regular cleanings.
   医生诊断出她患有牙龈病，需要定期洗牙。
3. 3. Gum disease can lead to serious health problems if left untreated.
   如果不及时治疗，牙龈病可能会导致严重的健康问题。