Hello there ,
Thanks for writing your query,
in the front teeth indicates that your teeth has undergone physical trauma or impact which may have made the teeth devital.
discoloration of teeth after trauma is usually seen when the teeth are dead or devital.
Such teeth are saved by root canal
procedure, provided the periodontal status of the tooth is good. That is, if the tooth is not mobile.
Root canal procedure disinfects the tooth by removing the infected nerve
tissue and the root canals are cleaned,shaped and filled with permanent restorative material.
Once the treatment is completed , the fractured tooth can be restored with a prosthetic crown coverage.
please discuss the treatment plan with the local dentist
in dali,china . im sure they will help you out .
i hope this helps ,