印度东北部人群下颌切牙根管的形态特征：一项体外研究。
Morphologic characteristics of root canal of mandibular incisors in North-East Indian population: An in vitro study.
作者信息
Boruah Lalit C, Bhuyan Atul C
机构信息
Department of Dentistry, FAA Govt Medical College, Jonia Road, Barpeta, India.
出版信息
J Conserv Dent. 2011 Oct;14(4):346-50. doi: 10.4103/0972-0707.87195.
AIM
To aim of this study is to investigate the root canal characteristics of mandibular incisors in a North East Indian population using a canal staining and tooth-clearing technique.
MATERIALS AND METHODS
Four hundred and eighty extracted mandibular incisors, collected from dental clinics within North East India were selected for this study. Following pulp tissue removal, the teeth were decalcified with 5% nitric acid, dehydrated with ascending concentrations of alcohol and rendered clear by immersion in methyl salicylate. After staining of the canal systems with India ink, cleared teeth were examined under 5X magnification and the following features were evaluated: (i) number and type of root canals; (ii) presence and location of lateral canals and intercanal communications; (iii) location of apical foramina; and, (iv) Bifurcation of canals.
RESULTS
The majority of mandibular incisors had a single canal (63.75% of teeth possessed a Type I canal system). Although 36.25% of the roots possessed two canals, only 6.25% had two separate apical foramina.
CONCLUSIONS
The prevalence of two canals in this group (of North East Indians) of mandibular incisors was 36.25% and is within the range of previous studies performed on populations of different racial origin.
目的
本研究旨在采用根管染色和牙齿透明技术，调查印度东北部人群下颌切牙的根管特征。
材料与方法
本研究选取了从印度东北部牙科诊所收集的480颗拔除的下颌切牙。去除牙髓组织后，牙齿用5%硝酸脱钙，依次用不同浓度的酒精脱水，然后浸入水杨酸甲酯使其透明。用印度墨水对根管系统进行染色后，在5倍放大倍数下检查透明后的牙齿，并评估以下特征：（i）根管的数量和类型；（ii）侧支根管和管间交通支的存在及位置；（iii）根尖孔的位置；以及（iv）根管的分叉情况。
结果
大多数下颌切牙有一个根管（63.75%的牙齿具有I型根管系统）。虽然36.25%的牙根有两个根管，但只有6.25%有两个独立的根尖孔。
结论
该组（印度东北部人群）下颌切牙双根管的发生率为36.25%，在之前对不同种族人群进行的研究范围内。
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