Identification of second canals in the mesiobuccal root of maxillary first and second molars using magnifying loupes or an operating microscope.
Identification of second canals in the mesiobuccal root of maxillary first and second molars using magnifying loupes or an operating microscope.
复制标题
使用放大镜或手术显微镜识别上颌第一和第二磨牙近颊根部的第二根管。
DOI：
--
复制
发表时间：
2002
影响因子：
1.6
通讯作者：
W. Geurtsen
中科院分区：
文献类型：
--
作者：
T. Schwarze;C. Baethge;T. Stecher;W. Geurtsen
许多作者研究了上颌磨牙（主要是第一磨牙）近颊根中第二根管（MB2）的频率。此外，据报道，在常规牙髓治疗期间治疗的MB2根管的百分比远低于体外识别的第二根管的数量。本研究的目的是探讨是否使用手术显微镜可以提高上颌磨牙近中颊根MB2根管的诊断。100上颌第一和第二磨牙（各50个）的根管口最初由检查员1使用单独适配的x2放大镜进行检查。随后，由第二名研究者使用放大8倍的手术显微镜（OPM）检查所有牙齿。最后，分离所有牙齿的近颊根。然后，对切片进行组织学分析和扫描电镜分析。组织学调查显示，共有63 MB2根管，39在第一，24在第二磨牙。只有26个（41.3%）的这些根管被发现使用放大镜，而59个（93.7%）被发现通过手术显微镜。
Various authors have investigated the frequency of second canals (MB2) in the mesiobuccal roots of maxillary molars, predominantly first molars. Further, it has been reported that the percentage of MB2 canals that are treated during routine endodontic therapy is much lower than the number of second canals identified in vitro. It was the purpose of this study to investigate whether the use of an operating microscope may improve the diagnosis of MB2 canals in mesiobuccal roots of maxillary molars. The canal orifices of 100 maxillary first and second molars (50 of each) were initially inspected by Examiner 1 using individually-adapted x2 magnifying loupes. Subsequently, all teeth were examined by a second investigator using an operating microscope (OPM) with x8 magnification. Finally, the mesiobuccal roots of all teeth were separated. Then, the sections were analysed histologically and by SEM. The histological investigation revealed a total number of 63 MB2 canals, 39 in first, and 24 in second molars. Only 26 (41.3%) of those canals were identified using magnifying loupes, whereas 59 (93.7%) were found by means of an operating microscope.