A case of a retained second deciduous molar palatal root displaced into the maxillary sinus

It is extremely rare for a deciduous tooth to be displaced into the maxillary sinus during exodontia. We report the case of a second deciduous molar palatal root that was displaced into the maxillary sinus. The patient was a 13-year-old girl. During deciduous tooth extraction by a local dentist, the fractured root was displaced into the maxillary sinus. The patient was referred to our hospital. Radiographic examination and CT scanning showed that the displaced tooth root was located on the upper part of the medial surface of the maxillary sinus. Under local anesthesia, the displaced tooth was removed via the canine fossa. There has been no sign of inflammation of the maxillary sinus.