Scientists attempt to regrow living tissue inside dead teeth

This small pilot study tested a new way to treat dead, infected permanent teeth. Doctors took healthy pulp tissue from a patient's own wisdom tooth and transplanted it into the cleaned-out root canal of the dead tooth, along with a special growth factor gel made from the patient's blood. The goal was to see if this could help the tooth heal from the inside, regain some feeling, and avoid extraction. Six patients were followed for one year to check for pain, infection, and signs of healing on 3D X-rays.