Department of Restorative Dentistry and Endodontics, Universitat Internacional de Catalunya, Barcelona, Spain.
J Endod. 2012 Jul;38(7):1007-11. doi: 10.1016/j.joen.2012.04.002. Epub 2012 May 23.
Inflammatory external root resorption (IERR) requires damage or loss of the protective layer and an inflammatory process in the unprotected root surface. Infection of the pulp space can occur after a serious injury and stimulate an inflammatory response. When the inflammatory stimulus is long-standing, the destructive phase will continue until the stimulation is removed.
This article describes the use of cone-beam computed tomography scanning in the diagnosis and management of a perforating IERR in tooth #10 with a 17-month follow-up and histologic examination after extraction for orthodontic reasons.
The histologic examination showed a cementum-like tissue interposed within the dentin defect. The cementum-like tissue was eosinophilic and irregular or poorly demarcated in some parts. Fibrous ligament tissue and no inflammatory response could be identified.
Mineral trioxide aggregate was shown to be suitable for the treatment of perforating IERR, and this finding agrees with the results observed in different studies conducted with animals.
炎症性牙外吸收（IERR）需要保护层的损伤或丧失，以及暴露在无保护的根面的炎症过程。牙髓腔的感染可能发生在严重损伤后，并刺激炎症反应。当炎症刺激持续存在时，破坏阶段将继续，直到刺激被消除。
本文描述了使用锥形束计算机断层扫描（CBCT）扫描对 #10 牙穿孔性 IERR 的诊断和管理，该病例经 17 个月的随访，并因正畸原因拔除后进行了组织学检查。
组织学检查显示在牙本质缺损内有牙骨质样组织插入。牙骨质样组织嗜酸性，在某些部位不规则或分界不清。可识别出纤维性韧带组织，无炎症反应。
三氧化矿物聚合体（MTA）被证明适用于治疗穿孔性 IERR，这一发现与不同动物研究观察到的结果一致。
