Retreatment of a mandibular left second premolar (3.5) with a lateral lesion

A female patient, ASA1, was referred for retreatment of tooth 3.5. She reported intermittent pain, and tenderness to percussion. Preoperative CBCT showed an apical and lateral radiolucency of 7 x 5 mm (CBCT-PAI score 4, Estrela et al.), located mainly…