If dry mouth symptoms of dry syndrome patients are heavy and persist for a long time, and they do not receive systematic and standardized treatment, they will gradually develop flaky tooth loss, root blackening and eventually form rampant teeth. Dry syndrome can cause a decrease in the amount of saliva secretion and a decrease in the level of active enzymes in saliva, which cannot protect the oral mucosa and teeth. At this time, when eating acidic and other irritating food, it can cause tooth damage, erode the crown and root of the tooth, and with the prolongation of time, the tooth will gradually fall off in pieces, the root becomes black, and finally loosens, leaving the residual root, thus forming rampant teeth. Patients with dry syndrome have a higher possibility of dental damage, therefore, they should receive early systematic and standardized treatment.