Hello there.  I can understand your concern.  Mallet finger can be corrected but the appraoch should be right and the treatment should be commenced as soon as possible.  You should have consulted a orthopedician back then so that he would have prescribed mallet splint which could have helped in your condition. As of now, you can go for surgical options but if it can be done would be determined by the orthopedician itself. Consult a orthopedician in person for further evaluation and management.  Best regards. Dr.  Anil kumar jain. Bangalore