The subjects use traditional Chinese medicine mouthwash after three meals a day and before going to bed, four times a day for 7 consecutive days. After 7 days, record the PLI value and conduct a xerostomia questionnaire, and then retrieve the mouthwash bottle the remaining dose was checked to determine compliance. Those with significantly poor compliance were excluded from the experiment, and then the daily cleaning measures were resumed. The subjects still followed the way of mouthwash four times a day until the end of the 21st day after the xerostomia questionnaire.

The subjects use dilute 50 times traditional Chinese medicine mouthwash after three meals a day and before going to bed, four times a day for 7 consecutive days. After 7 days, record the PLI value and conduct a xerostomia questionnaire, and then retrieve the mouthwash bottle the remaining dose was checked to determine compliance. Those with significantly poor compliance were excluded from the experiment, and then the daily cleaning measures were resumed. The subjects still followed the way of mouthwash four times a day until the end of the 21st day after the xerostomia questionnaire.

The mouthwash used in this test is based on the records of past traditional Chinese medicine classics and the existing antibacterial experimental evidence. The selected medicinal materials are honeysuckle, scutellaria, peppermint, licorice, and rhizome.

Turesky modification of the Quigley-Hein Plaque Index (TQHPI)

Xerostomia questionnaire, Pai (2001)