A little looseness of the tooth is recommended to be examined in the hospital and observed according to the situation with regular review of the affected tooth, root canal treatment of the affected tooth, extraction or periodontal fixation. The degree of looseness is divided into three degrees, one degree is buccolingual looseness; the second degree is buccolingual and proximal-distal-medial looseness; the third degree is buccolingual, proximal-distal-medial and vertical looseness. There are several reasons for tooth loosening: periodontitis leads to tooth loosening, trauma leads to tooth loosening, and pulp and root tip inflammation leads to tooth loosening. 1. When periodontitis causes 1~2 degrees of looseness of teeth, the teeth can be retained by periodontal fixation after stabilization of periodontal treatment, and can be considered to be extracted when the looseness is still more than 3 degrees after treatment. 2. When trauma causes tooth loosening, it is recommended to observe the affected teeth in the mouth, and periodontal fixation can be carried out when the degree of loosening is large, and at the same time, oral anti-inflammatory drugs, such as cephalosporin and metronidazole, etc., and observe for a period of time, the loosening of the teeth will improve, and the later periodical follow-up should be carried out to observe the situation. 3. Root canal treatment should be carried out when the tooth is loosened due to apical inflammation, the looseness will be improved at the end of the treatment for minor looseness, and the apical radiographs should be taken for serious looseness to assist in the examination, and to consider whether the tooth can be retained or not, and the alveolar bone resorption can be considered to be extracted if too much. Medications should be used under the direction of a physician.