摘要
目的 了解下颌第一恒磨牙根管的类型 ,为提高根管预备的效果提供解剖学依据。方法 采用透明牙技术用连续变倍体视显微镜对该牙根管类型进行观测。结果 30 0个离体牙中 ,共检出八种根管类型。其中 1- 1- 1型、2 - 2 - 1型、2 - 2 - 2型最多 ,占 91.4 %。远中舌根的发生率为 2 4 .7% ;双根管口率 :近中根为 78.3% ,远中根 (不含远中舌根 ,下同 )为 19.3% ;双根管率 :近中根为 88.3% ,远中根为 2 3.3% ;双根尖孔率 :近中根为 5 6 .7% ,远中根 8.3% ,单根管口而有双根尖孔者 ,近中为 6 .7% ,远中为 3.3%。结论 下颌第一恒磨牙根管的类型复杂 ,充分了解其根管解剖对提高根管预备效果、减少根管遗漏有重要意义。
Objective The purpose of this stady was to provide anatomical basis for improvment effect of intracanal preparation. Methods Thetype of the root canals have been observed under the sterograph microscope withthe transparent method. Results 300 mandibular first molars can be classified into eight types.Type 1-1-1,2-2-1 and 2-2-2 account for 91 4%;The appearing rats of distal lingual canal are 24 7%;The appearing rats of double root canal orifices are as follows:Medial canal 78 3%,distalcanal(It don’t include distal lingual canal,as follow)19 3%;The appearing rats of double root canal are as follow:medial canal 88 3%,distal canal 23 3%,The appearing rats of single root canal orifice and double apical foramens are as follow:medial canal 6 7%,distal canal3 3%.Conclusions The mandibular first mo1ar is made of a complex type of root canal.
出处
《四川解剖学杂志》
2003年第3期3-5,共3页
Sichuan Journal of Anatomy
基金
宜宾市市级科研课题资助项目
