Martins Jorge N R
Doctor of Dental Surgery, University of Lisbon (POR), Inter PG Endodontics at New York University (USA) . Certified member of European Society of Endodontology, Department of Endodontics of Instituto de Implantologia, Lisbon (POR).
J Clin Diagn Res. 2014 Jun;8(6):ZD13-5. doi: 10.7860/JCDR/2014/8229.4493. Epub 2014 Jun 20.
The most common configuration of the maxillary first molar is the presence of three roots and four root canals, although the presence of several other configurations have already been reported. The objective of this work is to present a rare anatomic configuration with seven root canals diagnosed during an endodontic therapy. Endodontic treatment was performed using a dental operating microscope. Exploring the grooves surrounding the main canals with ultrasonic troughing was able expose unexpected root canals. Instrumentation with files of smaller sizes and tapers was performed to prevent root physical weakness. The anatomic configuration was confirmed with a Cone Beam Computer Tomography image analysis which was able to clearly show the presence of seven root canals. An electronic database search was conducted to identify all the published similar cases and the best techniques to approach them are discussed.
上颌第一磨牙最常见的形态是有三根和四个根管，不过已有报道称存在其他几种形态。本文的目的是介绍一种在根管治疗过程中诊断出的罕见的具有七个根管的解剖形态。根管治疗是在牙科手术显微镜下进行的。用超声锉探查主根管周围的沟能够暴露意外的根管。使用较小尺寸和锥度的锉进行根管预备以防止牙根物理性变弱。通过锥形束计算机断层扫描图像分析证实了解剖形态，该分析能够清楚地显示七个根管的存在。进行了电子数据库检索以识别所有已发表的类似病例，并讨论了处理这些病例的最佳技术。
