Sempira H N, Hartwell G R
Virginia Commonwealth University, School of Dentistry, Richmond 23298-0566, USA.
J Endod. 2000 Nov;26(11):673-4. doi: 10.1097/00004770-200011000-00010.
Operating microscopes have recently been introduced to facilitate treatment of surgical and nonsurgical endodontic cases. The aim of this study was to determine in an in vivo clinical study if the use of an operating microscope would increase the number of second mesiobuccal canals located and obturated in maxillary first and second molars. Two hundred maxillary first and second molars treated with the aid of a microscope were evaluated. The number of second mesiobuccal canals that could be negotiated and obturated within 4 mm of the apex was recorded. Thirty percent of all maxillary molars had a negotiable second mesiobuccal canal. Evaluated separately, 33.1% of the maxillary first molars and 24.3% of the second molars had a negotiable second mesiobuccal canal. Results indicated that use of a surgical microscope did not increase the number of second mesiobuccal canals located, compared with those reports where access preparations were modified and the microscope was not used.
手术显微镜最近已被引入以促进外科和非外科牙髓病病例的治疗。本研究的目的是在一项体内临床研究中确定使用手术显微镜是否会增加在上颌第一和第二磨牙中定位并充填的第二近中颊根管的数量。对借助显微镜治疗的200颗上颌第一和第二磨牙进行了评估。记录了在根尖4毫米范围内能够疏通并充填的第二近中颊根管的数量。所有上颌磨牙中有30%存在可疏通的第二近中颊根管。单独评估时，上颌第一磨牙中有33.1%以及第二磨牙中有24.3%存在可疏通的第二近中颊根管。结果表明，与那些修改了开髓预备且未使用显微镜的报告相比，使用手术显微镜并未增加定位的第二近中颊根管的数量。
