Chogle Sami, Mickel Andre K, Self McKinley, Bogle John, Wright Andrew
Case School of Dental Medicine, Cleveland, Ohio, USA.
Gen Dent. 2007 May-Jun;55(3):218-20.
The success of endodontic therapy is based on a number of criteria, particularly the conservation of tooth structure. This principle requires a systematic approach to pulp chamber access. By correlating the occlusal anatomy with the location of the root canal orifice, a dentist may find a number of guidelines for improving access design. In this in vitro study, the authors evaluated 29 human maxillary first molars. Digital radiographs and digital occlusal photographs were taken of each specimen before and after decoronation at the cementoenamel junction (CEJ). The three images were superimposed on one another and evaluated for occlusal and pulpal patterns. The thickness of the pulp chamber walls of the CEJ varied, based on the circumference of individual teeth. In addition, the canal orifices at the pulp chamber floor exhibited a consistent pattern relative to the cusp tips, which may assist in access design.
牙髓治疗的成功基于多个标准，尤其是对牙齿结构的保存。这一原则要求采用系统的方法进行髓腔入口预备。通过将咬合解剖结构与根管口的位置相关联，牙医可以找到一些改进入口设计的指导原则。在这项体外研究中，作者评估了29颗人类上颌第一磨牙。在牙骨质牙釉质界（CEJ）去冠前后，对每个标本拍摄了数字化根尖片和数字化咬合照片。将这三张图像相互叠加，并评估咬合和牙髓模式。CEJ处髓腔壁的厚度因个体牙齿的周长而异。此外，髓腔底部的根管口相对于牙尖表现出一致的模式，这可能有助于入口设计。
