Tzanetakis Giorgos N, Lagoudakos Theodoros A, Kontakiotis Evangelos G
Department of Endodontics, Dental School, University of Athens, Athens, Greece.
J Endod. 2007 Mar;33(3):318-21. doi: 10.1016/j.joen.2006.08.006. Epub 2006 Oct 19.
This clinical article presents and describes the endodontic treatment of a mandibular second premolar exhibiting a total of four separate root canals. This incidence in mandibular second premolars is particularly rare in the international endodontic literature. Only some infrequent cases of mandibular second premolars with four canals have been presented; however, this was done without the use of the operating microscope. The use of magnification is a prerequisite to locate and to confirm the exact number and position of canal orifices and to complete successfully the endodontic treatment. The endodontic treatment of the mandibular second premolar presented in this article was conducted with the aid of the operating microscope and photos of the pulp chamber floor that were taken under different steps of magnification (8x, 12.8x, and 19.1x).
本文介绍并描述了一例下颌第二前磨牙的根管治疗，该牙共有四个独立根管。在下颌第二前磨牙中出现这种情况在国际牙髓病学文献中极为罕见。仅有一些下颌第二前磨牙有四个根管的罕见病例被报道过；然而，这些报道均未使用手术显微镜。使用放大设备是定位并确认根管口的确切数量和位置以及成功完成根管治疗的前提条件。本文所呈现的下颌第二前磨牙根管治疗是在手术显微镜的辅助下进行的，并拍摄了不同放大倍数（8倍、12.8倍和19.1倍）下的髓室底照片。
