Teeth are not bones; they belong to different organs. The composition of teeth, from the outside to the inside, are enamel, dentin, bone and pulp. The first three belong to the hard tissues of teeth, which constitute the basic form of teeth, and the hard tissues of teeth are composed of a large amount of inorganic salts such as calcium and phosphorus and a small amount of organic matter, etc., which are completely different from the composition of bone tissue. Bone tissue is generally formed by bone trabeculae, with a cavity of bone cells containing bone cells, and the bone cortex also contains a bone marrow cavity, which can accommodate bone marrow, teeth and bone belong to different systems, so if there is a problem with bone, it should be seen in orthopedics, and if there is a problem with teeth, it should be seen in dentistry.