This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Radiology
[{'content': 'Management of Osteoradionecrosis would be: \nSelect and explain. \nA. Hyperbaric oxygen, B. Removal of sequestrum, C. Fluoride application, D. All of the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Treatment of osteoradionecrosis at the present time is unsatisfactory.\nDecortication\xa0with\xa0sequestrectomy\xa0and\xa0hyperbaric\xa0oxygen\xa0with\xa0antibiotics\xa0have\xa0been\xa0used\xa0with\xa0limited\xa0success\xa0because\xa0of\xa0poor healing after surgery. Conservative approaches with the aim\xa0to\xa0maintain the integrity of\xa0the\xa0lower\xa0border\xa0of\xa0the\xa0mandible,\xa0keeping\xa0the\xa0site\xa0free\xa0of\xa0infection\xa0and\xa0the\xa0patient free\xa0of\xa0pain,\xa0may\xa0in\xa0the\xa0long-term\xa0prove\xa0more\xa0successful.\nThe risk for osteoradionecrosis is greater in the presence of odontogenic or periodontal disease and in individuals with poor oral hygiene or ill-fitting dentures.\nPatients should be referred for dental care before undergoing a course of radiation therapy to minimize radiation caries and osteoradionecrosis. Radiation caries can be minimized by restoring all carious lesions before radiation therapy and initiating preventive techniques of good oral hygiene and daily topical fluoride.', 'role': 'assistant'}]