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Prognosis of Replanted Permanent Incisors after Avulsion Injury: A Retrospective Study

완전탈구 후 재식한 영구 절치의 예후에 대한 후향적 연구

  • Lee, Hyungsub (Department of Pediatric Dentistry, School of Dentistry, Kyungpook National University) ;
  • Kim, Youngjin (Department of Pediatric Dentistry, School of Dentistry, Kyungpook National University) ;
  • Kim, Hyunjung (Department of Pediatric Dentistry, School of Dentistry, Kyungpook National University) ;
  • Kim, Sohyun (Department of Pediatric Dentistry, School of Dentistry, Kyungpook National University) ;
  • Nam, Soonhyeun (Department of Pediatric Dentistry, School of Dentistry, Kyungpook National University)
  • 이형섭 (경북대학교 치의학전문대학원 소아치과학교실) ;
  • 김영진 (경북대학교 치의학전문대학원 소아치과학교실) ;
  • 김현정 (경북대학교 치의학전문대학원 소아치과학교실) ;
  • 김소현 (경북대학교 치의학전문대학원 소아치과학교실) ;
  • 남순현 (경북대학교 치의학전문대학원 소아치과학교실)
  • Received : 2015.10.13
  • Accepted : 2015.11.25
  • Published : 2016.08.31

Abstract

Many studies on the prognosis of avulsed teeth were published but follow-up studies on Korean children and adolescents are insufficient. The aim of this study was to identify clinical factors determining the healing and prognosis of permanent incisors that were replanted after avulsion injury. This study included 184 permanent teeth in 142 patients aged 6-14 years. The clinical and radiographic data of the patients were analyzed from electronic medical records. Immature teeth had a higher probability of pulp revascularization than mature teeth. When extra-alveolar time was longer than 60 minutes, the incidence of inflammatory root resorption (IRR) was higher in immature teeth than mature teeth. However, the incidence of replacement root resorption (RR) was higher in mature teeth than immature teeth under the same condition. The incidence of IRR was increased when pulp was extirpated more than 20 days after replantation. IRR had a more significant influence on the decrease of survival expectation than RR. There was no significant correlation between the root development stage and survival expectation. However, when RR occurred, immature teeth survived shorter than mature teeth. Long term follow-up results from this study are expected to be used as fundamental data for the treatment guidelines and evaluation of the prognosis of replanted teeth.

지금까지 완전탈구된 치아의 예후에 대해 많은 연구가 발표되었으나, 국내의 소아와 청소년을 대상으로 한 추적 조사 연구는 거의 없다. 이에 본 연구에서는 6-14세 환자 142명의 재식치 184개를 대상으로 전자의무기록지와 치근단 방사선 사진을 평가함으로써 재식된 영구 절치의 치유와 예후에 영향을 미치는 인자에 대해 분석하였다. 재식치의 치근 발육 단계가 낮을수록 치수의 재혈관화 가능성이 높았다. 구외 시간이 60분 이상인 경우 염증성 치근 흡수의 발생률은 미성숙 치아에서 높게 나타났으며, 대치성 치근 흡수의 발생률은 성숙 치아에서 높게 나타났다. 20일 이상 경과하여 발수한 경우 염증성 치근 흡수의 발생률이 증가하였으며, 대치성 치근 흡수에 비해 염증성 치근 흡수가 생존 기간의 감소에 더 큰 영향을 미치는 것으로 나타났다. 치근의 발육 단계와 재식치의 생존 기간 간에 상관관계는 없었으나, 대치성 치근 흡수가 발생한 경우 미성숙 치아의 생존 기간은 성숙 치아에 비해 짧았다. 본 연구는 장기간의 추적 조사를 통해 수행한 연구로서, 완전탈구된 치아의 치료 지침과 예후 평가에 대한 기초 자료로 활용될 수 있으리라 생각된다.

Keywords

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