Reational osteogenesis in maxillary sinus associated with root canal infection
Note the hipodense images associated to the apex of the teeth #3 (16), in special the disto-bucal root apex, that is compatible with periapical inflammatory lesion. The close relationship of the apex of this maxillary molar with the maxillary sinus, allows that periapical lesion to promote an reactional osteogenesis and displacement of the floor of the maxillary sinus. Its possible to detect the thickening of sinus mucosal around the reactional defect.
Moreover, its possible to detect microdontia of the teeth #1 (18).