Importance of CT scans in diagnosing symptoms from misplaced implants.

Maxillary sinus or nasal cavity invasion with implants might not be detected during implant placement. However, these complications cause problems in the long run. In the following two cases, maxillary sinus and nasal cavity invasion with misplaced implants could not be detected with panoramic and periapical radiographs; the patients had to undergo several prosthetic and surgical procedures to have their problems resolved. These problems were detected with CT imaging technique. For the first patient, the misplaced implant was removed and a new prosthesis was fabricated on the remaining implants. The prosthetic treatment of the second patient was finalized with new implants placed in the removed implant sites, and a new metal-resin implant-fixed complete dental prosthesis was fabricated.