感染を契機に発見された筋突起に埋伏する含歯性嚢胞を伴う智歯の１例

coronoid process

北海道歯学会

北海道歯学雑誌

It is extremely rare that impacted third molar teeth move distantly from their original position and are　located in the coronoid process. In this case study, an impacted third molar tooth with a dentigerous cyst in the coronoid process is reported. The patient was a 72-year-old man. He noticed swelling and pain in the region of the left parotid-masseteric and visited his regular dentist. He was referred to our hospital because his symptoms gradually worsened. A clinical examination revealed severe swelling and pain in the region of the left parotid-masseteric, trismus, and edematous swelling in the buccal mucosa. A computed tomography scan showed a cyst-like transmission image surrounding the reverse impacted third molar tooth within the c oronoid process. A severe inflammatory response was revealed through a blood examination. An infection to the impacted third molar tooth and cyst-like lesion was diagnosed and treated with antibiotics. After the inflammation reduced, the impacted third molar tooth extraction and cyst enucleation was performed under general anesthesia. A histopathological examination showed a dentigerous cyst. Six months after the operation, the postoperative healing process was positive.