Figure 1.

Radiological and clinical findings of tooth 11 with external cervical resorption (ECR). The tooth diagnosed with Class 3 ECR according to Heithersay's bi-dimensional classification was extracted due to failure of the conservative treatment. (A) The periapical radiography shows the extension of the resorptive lesion in the coronal third of the root, and the endodontic treatment performed prior to the external repair of the lesion, without the possibility to evaluate the lateral spread of the lesion and its depth. (B) Buccal view of the extracted tooth with the lesion repaired with glass ionomer cement. (C and D) From mesial and distal view, the circumferential spreading of the lesion and also its depth was able to be observed.