The study will recruit 58 patients who are hospitalized at Lo-Sheng Sanatorium, Ministry of Health and Welfare. Investigators will use xerostomia questionnaire and PLI examination to collect the subject's data. Separate subjects in to two group randomly. The control group will use the traditional Chinese medicine mouthwash, and the other group will use the dilute 50 times of traditional Chinese medicine mouthwash.~Every 7 days will record the PLI value and conduct a xerostomia questionnaire, until 21 days.
The purpose of this study is to treat with traditional Chinese medicine mouthwash, and through the research of dental plaque detection and xerostomia questionnaire and traditional Chinese medicine treatment mechanism.