毛里求斯人和中国珠三角地区人上颌第一磨牙近中颊根根管形态比较研究  

Canal morphology of the mesiobuccal root of the maxillary first molar in people from Mauritius and Pearl River Delta region in China

作　　者：方溢云[1] 林正梅[2] Ashroy Jhugroo 

机构地区：[1]佛山市第一人民医院口腔医学中心,528000 [2]广州中山大学光华口腔医学院附属口腔医院牙体牙髓科 [3]毛里求斯国立医院牙体牙髓科

出　　处：《实用口腔医学杂志》2010年第6期759-763,共5页Journal of Practical Stomatology

摘　　要：目的:了解毛里求斯人和中国珠三角地区人上颌第一磨牙近中颊根根管系统解剖特征。方法:收集并筛选毛里求斯人和中国珠三角地区人离体上颌第一磨牙各80颗。采用常规探查法、根管显微镜法和透明标本法分析MB2根管口定位规律,记录近中颊根的根管数目和根管类型。结果:毛里求斯人和中国珠三角人MB-MB2的距离分别为(1.74±0.95)mm和(1.33±0.77)mm,MB-P连线与MB2-P连线的夹角(α)为(6.37±1.32)°和(7.31±1.39)°。毛里求斯人和中国珠三角人的多根管率分别是86.25%和82.50%。毛里求斯人的多根管以Ⅳ型为主,Ⅱ、Ⅰ、Ⅴ型次之,而中国人则以Ⅳ、Ⅱ型为主,Ⅲ、Ⅴ、Ⅵ型分别占少量。结论:人种不同上颌磨牙近颊根根管形态各有特点;辅助使用根管显微镜和超声工作尖,可提高上颌第一磨牙近中根管的多根管发现率,从而提高临床根管治疗成功率。Objective：To investigate the canal morphological characteristics of the mesiobuccal root of the maxillary first molar in people from Mauritius and Pearl River Delta region in China.Methods：80 extracted maxillary first molars of people from Mauritius and 80 of Chinese were collected and observed.The access cavities were then opened.Initially location and negotiation of MB2 canal were attempted without dental operating microscope（DOM）.Teeth in which MB2 was not located were furder explored under DOM.If simple exploring did not work,dentin was removed using an ultrasonic endodontic tip under DOM.The distance and angle between MB2 and MB1 were measured.The maxillary first molars were made transparent and the mesiobuccal roots were categorized using the Vertucci’s classification.Results：The mean distance between MB1 and MB2 canal orifices in Mauritian and Chinese were（1.74±0.95）mm and（1.33±0.77）mm respectively.The mean angle formed by the line joining MB1-P and MB2-P were（6.37±1.32）° and（7.31±1.39）° respectively.The frequency of multi-canal system in the mesiobuccal root in Mauritian and Chinese were 86.25% and 82.50% respectively.Most commonly seen in the MB canals were Vertucci type Ⅳ in Mauritian and typeⅡ and Ⅳ in Chinese.Conclusion：The anatomical data obtained from this study may provide experimental evidence for clinical management and increase the success rate of root canal therapy in maxillary first molars in Mauritian and Chinese.The treatment of MB2 can be facilitated and improved with the use of DOM and ultrasonic tip.

关 键 词：近颊根第二根管 根管解剖 根管显微镜 

分 类 号：R781.05[医药卫生—口腔医学]