It is incorrect to say that orthodontic treatment can loosen the teeth, while properly designed and straightened teeth will not loosen. Let’s understand the process of orthodontic treatment from the structural characteristics of teeth and alveolar bone. The tooth is divided into two parts: the crown and the root. The root is buried in the alveolar bone, just like the roots of a tree buried in the ground, and if soil erosion occurs (analogous to the resorption of the alveolar bone in the mouth), the tree will shake (the tooth becomes loose). Once we understand how teeth become loose, we need to look at why there is resorption of the alveolar bone. There are two main causes of alveolar bone resorption, one is unclean toothbrush leading to the formation of calculus, which stimulates the gums to form periodontal inflammation, and the other is excessive external stimulation, including excessive biting and lateral forces. In other words, if the teeth are clean and excessive orthodontic forces are avoided, the alveolar bone will not resorb, and both of these are possible, which is the basis for orthodontics to proceed smoothly. During the orthodontic process, the doctor will take great pains to remind patients to brush their teeth carefully, and if the inflammation control is unfavorable there is a possibility of early termination of treatment, in order to prevent periodontal inflammation leading to alveolar bone resorption, so friends must understand the good intentions of the doctor, cooperate carefully, brush your teeth carefully to ensure that the treatment goes smoothly. In addition, crowded teeth are often difficult to clean and periodontal inflammation develops before orthodontic treatment, but after orthodontic treatment is completed, teeth become straight and easy to clean, which helps control periodontal inflammation. It is normal for teeth to move slightly with the proper force, and the orthodontic bone will repair itself and regain its original stability. Doctors without formal training may not be able to control the force of tooth movement, resulting in excessive loosening of the teeth, so friends must keep their eyes open and choose orthodontically qualified doctors in regular hospitals to correct their teeth. Finally, patients are reminded not to believe in rumors, but to follow the doctor’s instructions to protect their teeth and safeguard their dental health.