We recently experienced three cases of benign cementoblastoma occuring in the mandible. Case 1 was a 37-year-old female with the lesion involving the apex of the right lower first molar. Case 2 was a 31-year-old female with the lesion involving the apex of the left lower impacted wisdom tooth. Case 3 was a 46-year-old female with the lesion involving the apex of the right lower first molar. Under the clinical diagnosis of cernentoma, tumor excision and tooth extraction were performed in all cases.
On histopathological examination, the excised section showed a mass of cementum-like structure or was composed of mature cementum. Also, the calcified mass was surrounded by cementoblast cells and the postoperative courses in the three cases were uneventful without any sign of recurrence.