Bisphosphonate-related osteonecrosis of the jaws (BRONJ) has a major negative effect on the quality of life of patients. However, there is still no consensus on effective treatment strategies for BRONJ. We report a case of BRONJ that was treated surgically. A 57-year-old woman who was given a diagnosis of breast cancer with multiple metastasis was referred to our clinic for evaluation of swelling of the left upper gum. Clinical examination revealed a fistulous tract with pus discharge that had developed after extraction of the upper left first molar at a dental clinic. The clinical diagnosis was an infectious bone lesion associated with bisphosphonate therapy. Conservative therapy with local irrigation and antibiotics was performed, but the lesion progressed and showed ulceration with exposed bone. We therefore determined that surgical intervention should be performed to remove the necrotic bone. A CT revealed extensive osteonecrosis of the maxila and a well demarcated interface between the necrotic and vital bone. The BRONJ was completely removed with sequestrectomy of the maxilla. Pathological evaluation confirmed necrosis of the maxilla. No evidence of metastatic disease was detected. The patient has been followed for 5 months since surgery and continues to do well.

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Peripheral odontogenic fibroma (POdF) is a rare, benign ectomesenchymal tumor. Herein, we report a case of a 15‐year‐old female patient who developed POdF in the mandible. The lesion was resected along with the periosteum. Histopathological findings revealed a small mass and cord‐like epithelium. There was no recurrence 16 months postoperatively.