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The following is Bian Xiao's common sense about oral health care.
1. Which of the following WHO standards is classified as oral health?
Oral health is one of the concrete signs that the World Health Organization measures human health, that is, teeth are clean, no defect, no pain, normal gum color and no bleeding.
2. The new concept of modern oral health care
The World Health Organization puts forward that "health is a perfect state of physical and mental preparation and social adaptation, not just the absence of disease and weakness". The teeth are clean, no defect, no pain, normal gum color, no bleeding, and only the teeth are disease-free.
The whole mouth also has the help of pronunciation and language movements, and has the functions of nerve feeling and participation in expression. The oral cavity is actually an important organ of social activities. So the new concept of modern oral health care is: white and beautiful teeth, fresh breath, normal oral movement, normal nervous system and other functions.
3. Where does the feeling of teeth come from?
Our teeth are coated with enamel. It is the hard tissue with the highest degree of white translucent calcification outside the crown. It mainly protects the inside of teeth. It is the hardest substance in the human body and has no nerves. The dentinal canal under enamel contains nerve fibers, which have obvious response to external mechanical, temperature and chemical stimuli. Generally speaking, external stimuli directly stimulate the nerve endings of dentin, and then transmit the feeling to the center through the branches of alveolar nerve.
4. What is the joint with the most frequent body movements?
In the study of human physiological function, it is found that the oral temporomandibular joint is the joint with the most frequent body movement in a day. Temporomandibular joint is a small joint in front of the ear. It connects the mandible to the skull. It is this joint that enables the lower jaw to move and move. It is the only joint in the human body that can be dislocated without trauma, and the joint capsule will not tear when dislocated. The temporomandibular joint described in medicine may need a more intuitive understanding.
Please do one action: put your palm close to your face, open your mouth and close it three times in a row. The joint movement between the fingers and the palm is the temporomandibular joint of the mouth. Keep your palms close to your face. Next, bite the bullet once, and you will feel the temporomandibular joint moving.