Abstract
The association of internal root resorption (IRR) with dens invaginatus is an extremely rare finding, and its incidence may be underestimated, adding to the difficulty of endodontic treatment. A 9-year-old boy was admitted with complaints of swelling and pain. Radiological examination revealed closed apex Oehlers type II dens invaginatus and severe IRR, as well as apical third of two lateral root perforation and lesion. Calcium hydroxide applied in the regenerative endodontic protocol (REP) as intracanal medicament. Differently, bleeding was achieved by irritating the lateral perforation area. However, the tooth showed spontaneous pain and sensitivity to percussion after 2 months. The same REP was performed, but a triple antibiotic paste was used as the intracanal medicament. After 2 years, the tooth was asymptomatic, and radiographic examination revealed the decrease was cared on the previous resorption sites, and one of the openings on the lateral root surface had closed.
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