根管显微镜在下颌前磨牙根管定位中的作用

Orifice locating with a dental operating microscope in mandibular premolar

目的:评价根管显微镜在下颌前磨牙根管定位中的作用。方法:选取来我院对下颌前磨牙诊治的病例共134例。其中,下颌第一前磨牙59例,第二前磨牙75例。在肉眼下,寻找根管口并记录数目,随后用根管显微镜在×5～×25的放大倍数下,重新寻找并记录。结果:15个(9.87%)额外的根管被找出。其中,9个发生在下颌第一前磨牙,6个发生在下颌第二前磨牙。结论:根管显微镜的运用可以增加下颌前磨牙根管口的识别,提高根管治疗的成功率。

Objective：The purpose of this study was to evaluate the effct ,whether the use of dental operating microscope （DOM） could increase the number of root canal orifices located in mandibular premolar tooth.Methods：134 cases including 59 mandibular first premolar and 75 mandibular second premolar were used. With the naked eye,all access cavities were prepared and the number of canals in each root was recorded. Using a DOM with x5-x25 magnification, all tooth had the access cavity preparations again examined. Results：After the DOM examination, 15 more canals could be visualized, repre-senting 9.87% increase in the total number of located canals. From these canals ,9 were located in the mandibular first pre-molar and 6 in the second premolar.Conclusion：The use of the DOM increases the number of root canal orifices located.