Fig. 3.

Patient 18. SCDDT resulting from dental treatment complicated by bacterial sinusitis (Class 3b). A) Swelling on the left cheek and B) relevant purulent secretion in the middle meatal and olfactory cleft of the left side with a fetid purulent discharge, in a patient with C) dental caries and presence of dental pathology; D) Coronal CT scan showing complete obliteration of the left maxillary sinus and the anterior ethmoid cells as well as the obstruction of the frontal recess. Note the asymmetrical skull base; E) Nine-month postoperative coronal CT scan showing complete aeration of all paranasal sinuses; F) as well as the complete absence of swelling on the cheek. G, H) The postoperative endoscopic view 9 months after endoscopic endonasal surgery showing the appearance of the anterior ethmoidectomy, turbinoplasty of the middle turbinate and maxillary sinusotomy. I) Intraoral appearance of healing after teeth extraction.