上颌第二磨牙第四根管口的解剖定位方法研究  

Study on anatomical location of maxillary second molars' fourth root canal orifices

作　　者：马惠萍[1] 李新春 李峥[3] 

机构地区：[1]开封大学医学部口腔系,河南开封475003 [2]开封市卫生学校附属医院 [3]四川大学华西口腔医学院,四川成都610041

出　　处：《医药论坛杂志》2013年第4期55-56,共2页Journal of Medical Forum

摘　　要：目的本文将探讨上颌第二磨牙第四根管口解剖定位,从而提高临床根管治疗效果,最终提高牙病患者生活质量。方法将100颗上颌第二磨牙标本进行预处理后,使用游标卡尺对标本各不同部位距离进行测定,之后使用日本Olympus耳鼻喉内窥镜系统对标本进行观察,并垂直于标本髓室底拍摄各髓室底图,将所拍摄图像存入计算机内进行角度测量。结果 100颗上颌第二磨牙标本发生第四根管口几率为39.00%、发生腭侧根双管几率为1.00%;上颌第二磨牙第四根管口位于近中颊侧(MB)根管口舌侧,腭侧根管口中心点到近颊根管口中心点连线(MB-P)近中。结论对患者进行上颌第二磨牙第四根管口明确定位,可提高患者治疗效果,降低患者根管治疗失败率,最终提高患者的治疗满意度,值得临床推广应用。Objective To discuss the anatomical location of maxillary second molars＇ fourth root canal orifices, which could improve the efficacy of root canal treatment and the life quality of patients. Methods Pretreatments for 100 isolated maxillary second molar were taken, and the distances for required positions were measured by calipers. Then we ohserved these isolated teeth with Japan＇ s Olympus ENT endoscope system and shot each tooth＇ s pulp floor. After that the photographs were saved in computer and measured. Results Totally 100 maxillary second molars had the fourth root canal in a probability of 39% , the probabi of occurrence in the palatal root double was 1%. The position of the fourth root canal was found on the lingual side nesiobuecal root canal and in the mesial side of the line between the palatal root tube center point and the center point of the mesiobuccal root canal orifice. Conclusions Making it clear of the specific position of maxillary second molars＇ fourth root canal orifices could reduce the failure rate of root canal treatment; Thereby improve the treatment satisfaction of patients,which is worth for clinical practice.

关 键 词：上颌第二磨牙 近中颊根 第四根管 解剖定位 

分 类 号：R781.33[医药卫生—口腔医学]