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Eruption Guidance of Horizontally Impacted Permanent First Molar with Primary Retention of Primary Second Molars: Case Reports

대한소아치과학회지 2020년 47권 2호 p.219 ~ 227
윤가람 ( Yoon Ga-Ram ) - Chosun University School of Dentistry Department of Pediatric Dentistry

이난영 ( Lee Nan-Young ) - Chosun University School of Dentistry Department of Pediatric Dentistry
이상호 ( Lee Sang-Ho ) - Chosun University School of Dentistry Department of Pediatric Dentistry
지명관 ( Jih Myeong-Kwan ) - Chosun University School of Dentistry Department of Pediatric Dentistry

Abstract


Tooth eruption involves a complex developmental process of tooth migration from the dental follicular origin to the final occlusion position in the oral cavity via the alveolar process. Disturbance of tooth eruption can occur at any point in a series of eruption stages; however, horizontal impaction of the mandibular first molar and primary retention of the primary mandibular second molar are rarely observed simultaneously. This study describes the treatment for two cases of horizontally impacted first molar with primary retention of primary molar. The primary retention of the primary mandibular second molar was extracted, and orthodontic traction was applied to the horizontally impacted primary mandibular first molar. Subsequently, displacement of the premolar tooth bud was improved and space regaining for eruption was achieved, guiding to normal eruption of the first molar.

키워드

Horizontal impaction; Primary retention; Eruption guidance; Permanent first molar; Primary second molar
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