CT features of a chronic maxillary sinusitis secondary to an ectopic tooth in the maxillary antrum.
Ectopic tooth outside the oral cavity is rarely described in the literature, especially within the maxillary sinus. The exact etiology is poorly understood and can be due to defects in embryological development, uneven teeth, genetic factors, trauma, and iatrogenic/idiopathic factors 1,2.
Ectopic teeth are usually asymptomatic, but sometimes may be a source of orofacial pain (impacted teeth), temporomandibular joint pain, or a source of infection such as purulent sinusitis1,2 (in maxillary location, as in this case).