Once you get over the initial shock of breaking a tooth, it is imperative that you see a dental professional for a thorough evaluation and treatment. One method for saving a tooth broken off at the gum line is through “crown lengthening”. But don't let this small surgery fool you—it packs big benefits. It is typically done using local anesthesia to numb the area in question. Small incisions are made inside the gum line, both cheek and tongue side, to expose the tooth's supporting bone so that a minor amount can be sculpted away to actually lengthen the tooth. After what is usually quite an uneventful healing, a permanent crown can be placed to return your smile to its former look.
Learn more about the process in Saving Broken Teeth.