A massive osteonecrosis with Le Fort I-type pathological fracture, caused by bisphosphonate-related osteonecrosis of the jaw (BRONJ): A rare case report

Abstract Bisphosphonates (BPs) are useful drugs for the management of osteoporosis and metastatic bone disease, and are used to prevent skeletal-related events. However, the side effects of BPs, bisphosphonate-related osteonecrosis of the jaw (BRONJ), sometimes severely impairs patient quality of life. Here we report a case of severe BRONJ in the maxilla, which caused Le Fort I-type fracture-like bone fracture due to formation of a large sequestrum in the maxilla.