Abstract
Abstract Corresponding author : Eunkyung KongDivision of Pediatric Dentistry, Department of Dentistry, Ajou University School of Medicine, 164, World Cup-ro, Yeongtong-gu, Suwon, 443-380, KoreaTel: +82-31-219-5869 / Fax: +82-31-219-5868 / E-mail: ekkong96@naver.comReceived December 20, 2013 / Revised February 17, 2014 / Accepted February 18, 2014http://dx.doi.org/10.5933/JKAPD.2014.41.2.157 Ⅰ. 서 론치아매복이란맹출이지연되거나완전히맹출이일어나지않는상태를말한다 1) . 맹출실패의명확한원인은밝혀지지않았지만여러국소적, 전신적인원인들이맹출실패를일으킨다 1,2) .그중과잉치로인한치아매복이전체매복의약60%를차지할만큼국소적인물리적장애물에의한치아매복이높은비율을차지하고있다 3,4) .물리적장애물에의해매복된치아의치료는장애물의제거를기본으로하며매복깊이및기울기등을평가하여자발적맹출의가능성을예측해야한다. Dalia 등 4) 은매복치가맹출한인접치아의치근의2/3 이상깊이위치한경우자발적맹출의가능성이낮다고하였다. 이 5) 는매복된상악견치의치관이인접한측절치의치축에대하여근심측에위치하거나, 매복된상악견치의치축과정중선이이루는각이55�이상일때자발적맹출의가능성이낮다고하였다. 또한매복치의치근발달수준은자발적맹출가능성과관련성이없다 3,6) . 따라서미완성치근단을가진매복치라도깊이매복되어있거나심하게기울어져있는경우외과적노출과함께교정적견인이필요하다. 전통적으로고정원(anchorage)의조절을위하여사용되었던구내, 구외장치들에서도작용-반작용의법칙에따라모든치아들의움직임을완벽히조절할수없는한계가있어서최근에는미니스크류(miniscrew), 미니플레이트(miniplate), 미니임플란트(mini implant)와같은골격성고정원이사용되고있다
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