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首页> 外文期刊>Journal of Endodontics: Official Journal of American Association of Endodontists >Operating microscope improves negotiation of second mesiobuccal canals in maxillary molars.
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Operating microscope improves negotiation of second mesiobuccal canals in maxillary molars.

机译：手术显微镜可改善上颌磨牙中近颊第二根管的通畅。

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摘要

This in vitro study investigated the prevalence, location, and pathway of the second mesiobuccal canal (MB-2) in 45 first and second maxillary molars using the operating microscope (OM). Initially location and negotiation of MB-2 were attempted without magnification. Teeth in which MB-2 was not located or could not be negotiated were further explored under OM. Roots where MB-2 could not be negotiated even with OM were cross-sectioned and inspected microscopically. Morphometric measurements were performed to map the location of MB-2. Without magnification an apparent MB-2 orifice was located in 42 teeth and the canal negotiated in 31 (69%). With OM one additional apparent MB-2 orifice was located, and five previously identified canals were negotiated (total 80%). The root cross-sections confirmed the absence of MB-2 in all nine teeth where it was not negotiated. Location of MB-2 varied randomly. In conclusion MB-2 can be negotiated in 80% of maxillary molars, although an orifice is apparent in 96% of the teeth. Ability to negotiate MB-2 is facilitated by OM.
机译：这项体外研究使用手术显微镜（OM）研究了45个第一和第二上颌磨牙中第二近中颊管（MB-2）的患病率，位置和途径。最初，MB-2的定位和协商在没有放大的情况下进行。 OM进一步探索了MB-2不在其中或无法协商的牙齿。横断面并显微检查，即使使用OM也无法协商MB-2的根。进行形态测量以绘制MB-2的位置。在没有放大的情况下，一个明显的MB-2孔位于42颗牙齿中，而根管通过了31颗（69％）。有了OM，又找到了另外一个明显的MB-2孔，并协商了五个先前确定的运河（总数为80％）。根部横截面证实了所有未协商过的9个牙齿中都不存在MB-2。 MB-2的位置随机变化。结论是MB-2可以在80％的上颌磨牙中通过，尽管在96％的牙齿中可以看到孔。 OM促进了MB-2的协商能力。

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