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Indirect palatal skeletal anchorage (PSA) for treatment of skeletal Class I bialveolar protrusion  

Chae, Jong-Moon (Department of Orthodontics & Dentistry, Daegu Fatima Hospital, The Korean Orthodontic Research Institute Inc.)
Publication Information
The korean journal of orthodontics / v.34, no.5, 2004 , pp. 458-464 More about this Journal
Abstract
Anchorage plays an important role in orthodontic treatment especially in the maxillary arch. In spite of many efforts for anchorage control. it was difficult for clinicians to predict the result of treatment because most of the treatment necessitated an absolute compliance of patients, But recently, skeletal anchorage has been used widely because it does not necessitate patient compliance but produces absolute anchorage. In addition titanium miniscrews have several advantages such as ease of insertion and removal. possible immediate leading and use in limited implantation spaces. In this case, a skeletal Class I bialveolar protrusion Patient was treated with standard edgewise mechanics using indirect active P.S.A. (palatal skeletal anchorage). The miniscrews in the paramedian area of the hard palate provided anchorage for retraction of the upper anterior teeth and remained firm and stable throughout treatment This indicates that the PSA can be used to reinforce anchorage for orthodontic treatment in the maxillary arch Consequently, this new approach can help effective tooth movement without patient compliance, when used with various transpalatal arch systems.
Keywords
PSA (palatal skeletal anchorage); Miniscrew; Modified transpalatal arch;
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