Fig. 1

Initial clinical presentation including a hard, non-fluctuating and painless swelling in the vestibule of the right maxilla A. In the periapical radiograph, a well-demarcated radiolucency was visible in the apical region between the roots of the upper second premolar, first and second molar B. The preoperative CBCT showed space-occupying ovoid osteolysis in the right maxilla expanding into the maxillary sinus lumen and to the buccal vestibule C