“…To date, many therapeutic agents including saliva substitutes [26], intensity-modulated radiotherapy [27,28], pilocarpine [29,30,31,32], acupuncture [33,34], and amifostine [35,36] had been available to alleviate radiation-induced xerostomia, but they rarely had curable effects or were even controversial regarding the safety of their use. So, the best method to treat postradiation xerostomia would be to choose preventive measures.…”