Single-step surgical treatment of odontogenic maxillary sinusitis: A retrospective study of 98 cases Publication date: Available online 4 May 2019 Source: Journal of Cranio-Maxillofacial Surgery Author(s): Fabio Costa, Enzo Emanuelli, Leonardo Franz, Alessandro Tel, Massimo Robiony Abstract Purpose The aim of this study was to review clinical and radiological presentation, surgery, and results of treatment in patients with chronic odontogenic maxillary sinusitis (OMS) treated with a single surgical procedure, including endoscopic sinus surgery (ESS) and oral surgical approaches to treat the odontogenic source of infection. Materials and methods A retrospective case series analysis of 98 patients was performed. All the patients received ESS. 88 patients required oral surgical approaches. Results Nasal symptoms were present in 58 patients (59.2%). Nasal endoscopy was positive in 65 patients (66.3%). A positive nasal endoscopy was significantly associated with nasal symptoms (p < 0.05). 60 patients (61.2%) had OMS of iatrogenic origin. Total opacification of the maxillary sinus was the most common radiological presentation (74.5%) and was significantly associated with nasal symptoms (p < 0.05). 91 patients (92.9%) had complete clinical and radiological resolution of the OMS. Conclusions Iatrogenic origin, sinonasal symptoms and positive clinical endoscopy are common in patients with OMS. Nasal symptoms were significantly associated with total maxillary sinus opacification and positive endoscopic clinical examination. Combining treatment of the odontogenic source of infection via an oral surgical approach and of the sinus inflammation by ESS appears to be sufficient for successfully treating patients with OMS.