Asgary Saeed, Ehsani Sara
Iranian Center for Endodontic Research, Dental Research Center, Dental School, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
Saudi Dent J. 2012 Jan;24(1):55-9. doi: 10.1016/j.sdentj.2011.08.001. Epub 2011 Aug 27.
This case report describes the periradicular healing and resorption of an unintentional extrusion of mineral trioxide aggregate (MTA) in an open-apex central incisor. A 22-year old female with a symptomatic open-apex right maxillary central incisor associated with a periradicular lesion was referred for evaluation and treatment. After chemomechanical debridement, the apical third of the root canal was filled with MTA to create an apical plug. Postoperative radiographs showed the extrusion of MTA into the periradicular lesion. The tooth was then restored with a post and crown. At the 2-year follow-up, the tooth was asymptomatic and radiographs revealed complete healing of the periradicular area. At the 7-year follow-up, complete resorption of the extruded MTA was evident. The results of this case study indicate that complete resorption of extruded MTA is possible in the long term; however, the extrusion of MTA in open-apex tooth should still be avoided.
本病例报告描述了一例开放根尖中央尖牙意外挤出三氧化矿物凝聚体（MTA）后的根尖周愈合及吸收情况。一名22岁女性，其右侧上颌中切牙开放根尖有症状且伴有根尖周病变，前来接受评估和治疗。经过化学机械清创后，根管根尖三分之一用MTA充填以形成根尖屏障。术后X线片显示MTA被挤出至根尖周病变处。然后该牙用桩核冠修复。在2年随访时，该牙无症状，X线片显示根尖周区域完全愈合。在7年随访时，挤出的MTA完全吸收明显。本病例研究结果表明，从长期来看，挤出的MTA完全吸收是可能的；然而，仍应避免在开放根尖牙中挤出MTA。
