Fig. 8

Odontogenic maxillary sinusitis originating from both an impacted third molar and a root infection of an external resorbed first molar in the right maxillary sinus. Preoperative panoramic view (a), Water’s view (b), and axial CT scan view showing an air-bubble and including a sinus mass (c). A coronal CT scan view showing the direct involvement of the right first molar (d) and a sagittal CT scan view showing direct involvement with three molars (e)