Trushkowsky Richard D
Quintessence Int. 2014 Jul-Aug;45(7):557-67. doi: 10.3290/j.qi.a31964.
The restoration of endodontically treated teeth is often required and may represent a challenge as there is no consensus on ideal treatment. The failure of endodontically treated teeth is usually not a consequence of endodontic treatment, but inadequate restorative therapy or periodontal reasons. Prior to the initiation of endodontic treatment the restorability, occlusal function, periodontal health, biologic width, and crown-to-root ratio need to be assessed. If acceptable, the appropriate technique, material, and type of restoration to restore function need to be considered. Posts are used to provide retention for the core material and to replace missing tooth structure. The residual amount of tooth structure will determine its stability for restoration. The creation of adequate ferrule (approaching 2 mm circumferentially is ideal) minimizes the damaging effects of lateral and rotational forces on the restoration and post.
通常需要对经过根管治疗的牙齿进行修复，这可能是一项挑战，因为对于理想的治疗方法尚无共识。经过根管治疗的牙齿失败通常不是根管治疗的结果，而是修复治疗不足或牙周原因所致。在开始根管治疗之前，需要评估牙齿的可修复性、咬合功能、牙周健康状况、生物学宽度以及冠根比。如果情况可以接受，则需要考虑采用适当的技术、材料和修复类型来恢复功能。桩用于为核材料提供固位，并替代缺失的牙体结构。剩余的牙体结构量将决定其修复的稳定性。形成足够的箍效应（理想情况下圆周方向接近2毫米）可将侧向力和旋转力对修复体和桩的破坏作用降至最低。
