Orthodontic movement of [[Teeth - Anatomy & Physiology|teeth]] can be described as '''prolonged application of pressure to the tooth, resulting in movement of the tooth as the [[Bones - Anatomy & Physiology|bone around it remodels]]'''. Bone on the compression side undergoes lysis allowing the tooth to move and bone formation on the tension side ensures that the tooth stays in the new position. In the ideal situation bone lysis and bone formation should be in equilibrium. In most practical situations, there is an imbalance and lysis occurs more rapidly. A retention phase maintaining the tooth in the new position while allowing time for bone formation is, therefore, necessary in many cases. | Orthodontic movement of [[Teeth - Anatomy & Physiology|teeth]] can be described as '''prolonged application of pressure to the tooth, resulting in movement of the tooth as the [[Bones - Anatomy & Physiology|bone around it remodels]]'''. Bone on the compression side undergoes lysis allowing the tooth to move and bone formation on the tension side ensures that the tooth stays in the new position. In the ideal situation bone lysis and bone formation should be in equilibrium. In most practical situations, there is an imbalance and lysis occurs more rapidly. A retention phase maintaining the tooth in the new position while allowing time for bone formation is, therefore, necessary in many cases. |