The most notable natural tooth movement is the eruption of primary and permanent teeth. Other natural movement occurs when a primary tooth is lost prematurely or when a permanent tooth is extracted. The remaining teeth may shift position by tipping over. Alternatively, the crown and root may shift. Shifting is an example of bodily tooth movement.
Orthodontic treatment can work under similar principles to natural tooth movement.
In cases of natural or orthodontic tipping or bodily movement, the crown and roots of the teeth remain intact. Orthodontic movement using braces is not possible if the tooth is ankylosed. Within the bone, there are certain cells called osteoblasts and osteoclasts. Bone itself is not a static tissue within your body. Osteoblasts, osteoclasts, and mineral movement are constantly in progress, causing a remodeling of the bone tissue.