Chronic maxillary sinusitis as an expression of infectious dental disease seemed destined to vanish. On the contrary, during the last years, the frequency of chronic maxillary sinusitis is rising again in relation to several factors, among these bacterial resistance as well as the poor dental hygiene and the limited access to odontologic care by not well-off patients play a key role. Anyway oral rehabilitative surgery (pre-implantologic and implantologic) is nowadays becoming the major cause of chronic maxillary sinusitis. The authors describe a recently observed case that, for its peculiarity, clearly exemplifies the variety of manifestations and the close relation between dental disease and anatomic nasal defects in the genesis of sinusal disease.