Patient: description of the condition (onset time, main symptoms, hospital visits, etc.): patient male 18 years old, the previous gum redness and swelling did not take it seriously, this time the front lower teeth in the middle of the five exposed tooth roots before paying attention. Shenyang Dental Hospital said periodontitis did not treat how to cure? Can be restored to the original? The Second Hospital of Zhejiang University School of Medicine, Department of Oral Medicine Sun Weilian: Hello! We suggest that you go to the Department of Stomatology as soon as possible to find a periodontist to help you. If you have periodontitis at the age of 18, it is important to rule out the presence of aggressive periodontitis. Periodontitis should be treated as early as possible and regular systematic periodontal treatment is recommended. Early treatment is very effective. If it reaches the middle and late stages, the alveolar bone has absorbed a lot, just like a tree planted, if there is little mud, the tree will shake and is not strong. In advanced periodontitis, it is difficult to restore the lost alveolar bone to its original height after treatment. However, if left untreated, the alveolar bone will continue to resorb and become more and more serious, and the result will be loose, displaced and lost teeth. Regular oral examination is recommended! Early detection and treatment of oral diseases! Enhance the awareness of “oral disease, prevention-oriented” health care! Wish you good luck!