Abstract
Placement of dental implants is currently routinely performed in many dental hospitals and institutions, as a result of which, associated complications have also increased. We report three cases as examples of maxillary sinusitis which have been caused by implant placement and sinus lift procedure. The first of these three cases involved a perforation of the maxillary sinus membrane and accidental insertion of foreign body materials into the sinus. We removed the iatrogenic foreign body from maxillary sinus with endoscopic sinus surgery. On the other hand, treatment of maxillary sinusitis following exposure to dental implants is very difficult, because the implants are still in situ and working. We should be aware that exposure of the maxillary sinus to the presence of dental implants may cause sinusitis at some stage in the future. In addition, sinus floor elevation must be considered in those case where exposure of the sinus to dental implants might be expected.
