摘要
目的:应用显微镜观察上颌第二磨牙髓室底形态和根管数目。方法:分析2012年7月至2014年6月中日友好医院牙体牙髓科收治的上颌第二磨牙192颗,在显微镜下,用DG-16探针探查根管口,配合超声器械,17%EDTA,2.5%NaOCL,小号K锉探查并疏通根管,记录根管数目,Protaper预备根管,热牙胶垂直加压充填。结果:上颌第二磨牙髓室底形态:Ⅰ型102颗(53.13%),Ⅱ型42颗(21.88%),Ⅲ型32颗(16.67%),Ⅳ型16颗(8.33%);根管形态:单根管4颗(2.08%),双根管18颗(9.38%),三根管112颗(58.33%),四根管58颗(30.21%)。其中颊侧近中第二根管(MB2)54颗(28.13%),远中颊第二根管(DB2)2颗(1.04%),腭侧双根管2颗(1.04%)。结论:上颌第二磨牙根管数目变异较大,尤其是MB2的发生率较高,临床医生应予以重视。应用根管显微镜可以提高根管定位的精准度和根管治疗的成功率。
Objective： To investigate the floor of pulp chamber morphology and the clinical root canal number of maxillary second molars using endodontic microscope. Methods： 96 cases of maxillary second molar during 2012-7-2014-6 in China-Japan Friendship hospital were examined under endodontic microscope. Root canal orifice was detected with a DG-16 explorer. Each root canal was dredged with small K file, and the preparation was accomplished in a crown—down technique with Protaper. Ultrasound technique was used with ingredient 17% EDTA and 2.5% NaOCl during root canal preparation. The floor of pulp chamber morphology and the root canal number were recorded.Canal obturation was performed in a warm vertical compaction technique. Results：In all the 96 maxillary second molars： 102 teeth were typeⅠ（53.13%）, 42 teeth were type Ⅱ（21.88%）,32 teeth were type Ⅲ（16.67%）,16 teeth were type Ⅳ（8.33%）; 4 teeth had only one root canal（2.08%）,18 teeth had two（9.38%）,112 teeth had three（58.33%）,58 teeth had four（30.21%）,54 of 58 teeth had second mesiobuccal canal（MB2）（28.13%）,two teeth had two palatal root canals（1.04%）.two teeth had second distalbuccal canal（DB2）（1.04%）. Conclusion： The root canals of maxillary second molars have some variations and attention should be paid in clinic.Using endodontic microscope can prominently improve the accuracy of root canal localization and increase the success rate of treatment.
出处
《中华老年口腔医学杂志》
2014年第5期281-284,共4页
Chinese Journal of Geriatric Dentistry
关键词
上颌第二磨牙
根管数目
根管显微镜
近中颊根第二根管
maxillary second molars
root canals number
endodontic microscope
second mesiobuccal canal
