||Teeth move during orthodontic treatment as a calculated directional force is applied to each tooth using brackets and wires or aligners. This causes cells within the jawbone to differentiate causing resorption of the bone in the direction of the movement. When movement ceases, new bone is laid down.
It is normal during orthodontic treatment to periodically feel that your teeth are sore or loose. These annoying feelings can be controlled with diet or analgesics.