头颈部肿瘤(如鼻咽癌)常规放疗后,唾液分泌减少、口腔干燥,加重味觉障碍、龋齿、吞咽困难、进食呛咳等。其症状迁延、进行性加重而无有效控制方法,以致牙齿疼痛、睡眠障碍、不愿与人交流,心情长期压抑、烦躁易怒,严重影响患 Head and neck cancer (such as nasopharyngeal carcinoma) after conventional radiotherapy, decreased salivation, dry mouth, aggravating taste disorders, dental caries, difficulty swallowing, eating cough and so on. The symptoms persist, progressive increase without effective control methods, resulting in dental pain, sleep disorders, do not want to communicate with others, long-term depression, irritability, serious impact on the affected