Grade 3 means the highest mobility of a tooth. it is usually extracted. To save it first the periodontal condition of the tooth will be assessed. accordingly a treatment can be planned.

Although grade 3 mobile tooth is advised for extraction.  An IOPAR or Rvg image can better help in diagnosis of the oral condition , the amount of bone support etc. Considering your age, it seems that there must be some periodontal condition since you say that it's grade 3 mobile. Surgery and bone graft requires a lot of patience and maintenance of oral hygiene along with regular check up.

Hi,Please visit a Periodontist or gum specialist for the same.For Grade 3 tooth mobility it is very difficult to save the tooth.

Hello, you need to consult a periodontist and check the long term prognosis. Regards Dr Sumanmakam

Grade 3 mobile teeth are usually hard to save but your dedication towards ur hygiene after periodontal surgery can do wonders. Visit a dentist to get a x ray done and the treatment plan made. An x ray only can give better answer