Endodontic Mx of dens invaginatus type III associated with a
Dens invaginatus (DI) is a dental developmental abnormality, probably resulting from an infolding of the dental papilla during tooth development.

The following case report, published in the Journal of Conservative Dentistry presents a case of Type III DI with apicomarginal defect and peri-radicular lesion, diagnosed with cone-beam computed tomography scan and treated with combined orthograde endodontic therapy and peri-radicular regenerative surgery.

Follow-up examination at 2 years revealed uneventful healing and improvement in the status of the tooth-supporting structures.

A 16-year-old female with a chief complaint of pain and pus discharge was referred for endodontic treatment of her maxillary left lateral incisor (#22). Clinical examination revealed no caries, no discoloration, normal tooth morphology and the presence of a fistula in relation to #22. The tooth was mildly tender on percussion and recorded normal mobility.

Periodontal examination revealed a deep pocket on the buccal aspect of the tooth #22. Remaining dentition revealed excellent gingival health. There was no history of previous orofacial trauma. Medical history was noncontributory. Pulp sensibility tests with refrigerant spray (Endo-Frost; Roeko, Langenau, Germany) and electric pulp tester (Digitest, Parkell Inc., Farmingdale, NY, USA) revealed negative response from #22.

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