The practice of clinical orthodontics is largely dependent on the availability of anchorage. Anchorage, by definition, is a bodys resistance to displacement. An important aspect of treatment is maximizing the toot movement that is desired, while minimizing undesirable side effects. There are numerous ways in which orthodontist has tried to augment anchorage, including auxiliary devices such as headgear, transpalatal arches, and other appliances. Many of these appliances are awkward or uncomfortable for patients, often leading to less than desired levels of compliance. Thus, treatment outcome...