在头颈部肿瘤常规放疗中,下颌骨往往不可避免地受到高剂量照射,部分患者会因此出现严重晚期放射并发症—下颌骨放射性骨坏死(osteoradionecrosis,ORN)。笔者将对其发生率、病因、诊断、危险因素、预防和治疗措施进行综述。一、下颌骨ORN的发生率从放疗方式来说,不论外照射、近 In conventional radiotherapy of head and neck cancer, the mandible is often inevitably exposed to high doses of radiation and some patients may experience serious late radiation complications - osteoradionecrosis of the jaw (ORN). The author will review its incidence, etiology, diagnosis, risk factors, prevention and treatment measures. First, the incidence of mandibular ORN from radiation therapy, regardless of external radiation, near