In particular, the change of the salivary gland: aging process makes the descending line that tissue instead of fat and connective tissue, thereby reducing the secretion of saliva and cause a lot of problems oral health problems such as: dental caries, periodontitis, oral burning sensation, ... 
Changes in teeth: teeth become dark, brittle, easily cracked.

2. Tooth decay 
In the elderly, deep roots often associated with receding gums from nah periodontal disease and oral dryness. 
Cause of tooth decay: effects on bacterial food (mainly carbohydrates), creating acid destroys tooth structure to create holes on the surface called cavities.

3. Periodontal Disease 
Periodontal disease is a major problem for the oral health of the elderly. Without timely intervention will lead to bone resorption, pepper ligaments around the teeth, loose teeth and eventually tooth loss. 
Many studies show that periodontal disease and the severity of periodontal disease increases with age.

4. Temporal dysfunction jaw disease 
Increased degenerative changes, osteoarthritis joint, long-term tooth loss can not be recovered is a common cause of damage on a large sip and drive leads to joint dysfunction solar function. 
Symptoms: pain in the joints of the solar function, fatigue, jaw, limited jaw movement (hard to open mouth), there is a cry in the joints.

5. Dry mouth 
Age the process of changing the salivary glands, saliva and mucus consistency, easier to create plaque, creating a favorable environment for the bacteria that cause tooth decay, gingivitis, periodontitis. 
Cause: decreased salivation due to diabetes, neuropathy, pernicious anemia, drug-induced, due to degeneration of tissue, radiation therapy to the head, face, ... 
Lack of saliva makes hot lips, cracked tongue, oral mucosa dry, white thick and foul, to store food, swallowing difficulties because saliva is necessary to lubricate and close the bolus.

6. Tooth erosion and tooth sensitivity 
Cause 
Physiology: their use 
Food: high in fiber and acid 
Incorrect brushing method 
Gnashing of teeth 
Consequences 
Joint pain, broken teeth, joint pain temple jaw, difficulty chewing

7. Oral cancer 
50% of oral cancer metastasis when detected so the survival rate is low. Factors, the risk of: leaves, betel food, drink. 60% of oral cancer associated with betel eating and drinking.

Ths.Bs. Vo Van Nhan