口腔干燥症是一种常见的头颈部肿瘤放射治疗并发症和后遗症。口干症被定义为因唾液量减少或完全消失导致口腔干燥。足够的唾液量对口腔健康和功能的维护必不可少,唾液量减少会导致许多并发症,如龋齿、口腔粘膜烧灼感、义齿固位不良或难以固定、影响说话和吞咽、味觉减弱或改变。口腔干燥症严重影响头颈部肿瘤患 Xerophthalmia is a common complication and sequelae of head and neck cancer radiotherapy. Dry mouth is defined as dry mouth resulting from a decrease or complete disappearance of saliva. Sufficient saliva volume is essential for the maintenance of oral health and function. Decreased saliva volume can lead to many complications such as dental caries, a burning sensation in the oral mucosa, poor retention of the denture or difficulty in fixing, affecting speech and swallowing, diminishing or changing taste. Oral xerophthalmia seriously affects the head and neck cancer patients