人到老年,生理功能会发生明显的改变,其中,消化系统的退行性变化要数口腔最为明显了。牙齿松动、脱落是老年人常见的现象。由于牙列缺乏,咀嚼功能降低,加上老年人唾液分泌减少,使得食物在口腔中不能充分咀嚼和初步消化就进入胃肠系统,从而加重了胃肠道的负担,久而久之可引起胃肠道疾病。所以,脱落牙齿的老人不 People to the elderly, physiological function will be significantly changed, of which the degeneration of the digestive system to the number of the most obvious oral. Loose teeth, shedding is a common phenomenon in the elderly. Due to the lack of dentition, chewing function is reduced, coupled with the elderly to reduce the secretion of saliva, making the food in the mouth can not be fully chewed and initially digested into the gastrointestinal system, thus increasing the burden on the gastrointestinal tract, over time can cause gastrointestinal diseases . So, elderly people do not fall off teeth