Fixing a broken tooth with super glue can cause two serious problems: misalignment of the fragment and damage to the dentin tubules inside the tooth, according to Dr. Charles Bohle of Bohle Family Dentistry. The fragment can also accidentally become stuck to a finger or to the soft tissues of the mouth.
Super glue forms a permanent bond, notes Dr. Bohle. If the fragment does not have the correct placement, a dentist must perform major corrective work. Dentists can dissolve the super glue if necessary, but the solvent itself is toxic.
Glue that gets into the dentin tubules of the tooth can kill the tubules, causing damage inside the tooth. Sometimes this damage is repairable with a root canal, but it's possible for damage to be so severe that the tooth requires extraction. In addition to oral damage, super glue fumes can cause reactions in some people, notes Smile Columbia Dentistry.
If a patient breaks a tooth, he should see a dentist as soon as possible, advises WebMD. In the meantime, he can take over-the-counter remedies for pain, cover sharp edges with sugarless gum or paraffin, and avoid chewing with the broken tooth.