REINFORCEMENT OF FRACTURE RESISTANCE AFTER APEXIFICATION : CASE REPORT

미성숙 영구치는 치아우식증, 외상, 비정상적인 치아 형태로 인한 파절 등에 의하여 치수 생활력을 상실할 수 있다. 이때 이용되는 치료법이 치근단 형성술로서 실활치의 치근단 치수 부위에 광화된 조직의 형성을 통하여 치근단 폐쇄를 유도한다. 현재 수산화칼슘 치근단 형성술이 가장 많이 이용되는데 근관 내에 수산화칼슘을 장기간 적용할 경우 치근단 경조직 형성을 유도할 수 있지만, 강한 알칼리성으로 인하여 치근 약화를 야기하여 치아 파절 위험성이 높아진다. 그러므로 근관 충전 시 치아보강을 위한 수복이 고려되어야 한다. 본 증례는 생활력을 상실한 미성숙 영구치에서 장기간의 수산화칼슘 치근단 형성술 후 치아 보강을 위하여 MTA plug, 섬유강화형 포스트 그리고 복합 레진을 이용한 근관 충전을 시도하였기에 보고하는 바이다. 【The vitality of immature tooth could be lost by dental caries, trauma and fracture of malformed tooth. The vitality loss might lead to halt of the development of the root. The recommended endodontic treatment for a non-vital immature permanent tooth is apexification. Apexification is a method of inducing apical closure through the formation of mineralized tissue in the apical pulp region. Calcium hydroxide is the material of choice for apexification. Long-term exposure to calcium hydroxide may form the apical hard tissue, but weaken the dentin due to its alkaline nature and thus make the roots more susceptible to fracture. It is important to preserve any weakened tooth, so a permanent restoration is needed to reinforce teeth that are prone to fracture. The purpose of this case report was to describe the treatment for reinforcing immature teeth treated with long-term calcium hydroxide. In these cases, the apexes of teeth were sealed with MTA plugs and the root canals were restored with composite resin and fiber post.】

[1]  Jaegon Kim,et al.  PULP REVASCULARIZATION OF IMMATURE FIRST PERMANENT MOLARS WITH APICAL PERIODONTITIS : CASE REPORT , 2012 .

[2]  T. Kirkpatrick,et al.  Reinforcement of simulated immature roots restored with composite resin, mineral trioxide aggregate, gutta-percha, or a fiber post after thermocycling. , 2011, Journal of endodontics.

[3]  S. Jeong,et al.  MTA APEXIFICATION OF TRAUMATIZED IMMATURE PERMANENT INCISORS: A RETROSPECTIVE STUDY , 2011 .

[4]  Mohammad Rayyan,et al.  Fracture resistance of teeth restored with post-retained restorations: an overview. , 2010, Journal of endodontics.

[5]  N. Chandler,et al.  The restoration of permanent immature anterior teeth, root filled using MTA: a review. , 2009, Journal of dentistry.

[6]  J. Andreasen,et al.  Comparison of fracture resistance in root canals of immature sheep teeth after filling with calcium hydroxide or MTA. , 2006, Dental traumatology : official publication of International Association for Dental Traumatology.

[7]  C. R. Valois,et al.  Influence of the thickness of mineral trioxide aggregate on sealing ability of root-end fillings in vitro. , 2004, Oral surgery, oral medicine, oral pathology, oral radiology, and endodontics.

[8]  J. Andreasen,et al.  Long-term calcium hydroxide as a root canal dressing may increase risk of root fracture. , 2002, Dental traumatology : official publication of International Association for Dental Traumatology.

[9]  M. Kinirons,et al.  Non-vital immature permanent incisors: factors that may influence treatment outcome. , 1999, Endodontics & dental traumatology.

[10]  M. Cvek Prognosis of luxated non-vital maxillary incisors treated with calcium hydroxide and filled with gutta-percha. A retrospective clinical study. , 1992, Endodontics & dental traumatology.