Abstract
Osteonecrosis of the jaw (ONJ) is characterized by a chronic wound in the oral mucosa with exposed necrotic bone. This condition can occur after tooth extraction or other types of oral surgery; however, it can also develop spontaneously adjacent to infected teeth or an implant. The lesion can be symptomatic but is often asymptomatic. Both irradiation to the head and neck region (osteoradionecrosis) and bacterial infection, mainly Staphylococcus aureus (osteomyelitis), have long been known to cause this phenomenon.
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