If your front tooth is Brocken,there are many ways by which it can be restored to normal such as a filling(restoration) or a crown,but before doing so dentist will be needing a diagnostic x ray to evaluate how much part of the tooth is Brocken & whether it will be needing a root canal treatment or not.
Next Steps
visit a dentist & get an iopa x ray done
Health Tips
if u have the Brocken part of the tooth also,get it with you & show it to the dentist.That might be useful.