Repetitive regenerative endodontic protocol treatment for mature teeth with dens invaginatus and severe perforated internal root resorption: A case report with 24-month follow-up

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 endodontic treatment. A 9-year-old boy was admitted complaints swelling pain. Radiological examination revealed closed apex Oehlers type II severe IRR, as well apical third two lateral perforation lesion. Calcium hydroxide applied in regenerative protocol (REP) intracanal medicament. Differently, bleeding achieved by irritating area. However, tooth showed spontaneous pain sensitivity percussion after 2 months. same REP performed, but a triple antibiotic paste used After years, asymptomatic, radiographic decrease cared on previous sites, one openings surface had closed.