Endoscopic Transnasal Apicoectomy for Odontogenic Maxillary Sinusitis.

Endoscopic transnasal apicoectomy (ETA) is a novel multidisciplinary technique that combines endoscopic sinus surgery with apicoectomy via a transnasal approach. ETA enables direct access to periapical lesions while preserving the causative tooth. Our initial experience suggests that this minimally invasive approach is safe, feasible, and effective for selected cases of odontogenic maxillary sinusitis.