OrthoArch.com - Microscrews

Microscrews

Clinicians continue to need anchorage that displays a high resistance to displacement. According to Newton's Third Law, there is a reaction for every action, control of which is difficult to achieve intraorally. Earlier, orthodontists used extraoral traction to reinforce intraoral anchorage. Nevertheless, patients seldom used headgears 24 hours a day - 7 days a week, hence this source of anchorage was often compromised. The ideal intraoral anchorage would not displace, and would require a source devoid of periodontal membrane, which tends to respond to tension and pressure allowing movement through bone. Recently, prosthetic osseointegrated implants have been used as intraoral orthodontic anchorage, but their bulky size, cost and invasiveness have limited their orthodontic application.
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