Fifty-year follow-up of dens invaginatus treated by nonsurgical and surgical endodontic treatments: a case report

This case report presents a lateral maxillary incisor with dens invaginatus (DI) type IIIb that was treated both nonsurgically and surgically over 50 years. Treatment of teeth with DI can be challenging. Suggested options may include nonsurgical root canal treatment, endodontic surgery, or extraction. In this case report, a 13-year-old patient with a lateral maxillary incisor with DI type IIIb was treated by nonsurgical root canal treatment, modern endodontic surgery, and reoperation over the course of 50 years. There was complete healing at the last follow-up, 11 years after the reoperation. Correct diagnosis and proper treatment using modern endodontic techniques can enable teeth with DI to survive throughout the life span of the patient.