Journal of the Korean Academy of Pediatric Dentistry 2011;38(3):303-308.
Published online August 31, 2011.
RTHODONTIC TRACTION OF IMPACTED MANDIBULAR SECOND PRIMARY MOLAR
Min-Jung Kim, Sang-Ho Lee, Nan-Young Lee, Hyang-Gil Jang
Department of Pediatric Dentistry, School of Dentistry, Chosun University 
매복된 하악 제2유구치의 교정적 견인
김민정, 이상호, 이난영, 장향길
조선대학교 치의학전문대학원 소아치과학교실
Correspondence:  Sang-Ho Lee,  Tel: 062-220-3860, Email: shclee@chosun.ac.kr
Received: 18 July 2011   • Accepted: 17 August 2011
Abstract
Tooth impaction refers to situations in which the eruption is inhibited by some physical barriers in eruptive path and the tooth remains unerupted beyond the normal time of eruption. The etiology of impacted tooth is controversial, but ankylosis has been suggested probably as a leading role. Impacted primary molars may cause several problems such as space loss, tipping of adjacent teeth, supra-eruption of the antagonists, dislocation of succeeding premolar, cystic change and infection. As one of conventional treatments of impacted primary molars, early tooth extraction or surgical extraction following space regaining when there is space loss has been suggested. However, when they are in normal formation and not ankylosed, orthodontic traction following surgical exposure can be the choice of treatment. In this case, a 3-year-old boy was referred to the department of pediatric dentistry for the unerupted mandibular right second primary molar. After surgical removal of gingiva on the occlusal surface, orthodontic traction was performed. After treatment, we could get normal alignment of primary teeth and the opportunity for normal development of permanent teeth.
Key Words: Tooth impaction, Orthodontic traction, Mandibular second primary molar


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