Rahimi Saeed, Milani Amin Salem, Shahi Shahriar, Sergiz Youbert, Nezafati Saeed, Lotfi Mehrdad
Dental and Periodontal Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.
Indian J Dent Res. 2013 Mar-Apr;24(2):234-6. doi: 10.4103/0970-9290.116694.
Complete debridement and obturation of the root canal system is a key factor in successful endodontic treatment and the operator should therefore have thorough knowledge of the root canal morphology of the teeth. Numerous studies have been carried out to investigate the canal configuration of different tooth types in various populations.
The aim of the present study was to investigate the internal anatomy of mandibular incisors and canines in an Iranian population.
A total of 463 mandibular anterior teeth, including 186 centrals, 128 laterals, and 149 canines, were examined. A standard clearing technique was used to make the teeth transparent. India ink was injected into the canals of the teeth and the samples were examined with a magnifying glass. The root canal configurations were categorized according to the Vertucci classification.
All the incisors in this study had one root, and 12.08% of the canines had two roots. We found a slightly higher prevalence of the second canal in incisors than in canines (36.62% vs. 20.48%). However, the probability of canines having two separate apical foramina was higher than that for incisors (12.08% vs. 0.64%).
In view of the high prevalence of two-canaled mandibular anterior teeth found in this study, it would be prudent to assume that any mandibular anterior tooth being treated is two-canaled until a thorough search proves otherwise.
根管系统的彻底清创和充填是牙髓治疗成功的关键因素，因此操作者应全面了解牙齿的根管形态。已经开展了大量研究来调查不同人群中不同牙型的根管形态。
本研究的目的是调查伊朗人群下颌切牙和尖牙的内部解剖结构。
共检查了463颗下颌前牙，包括186颗中切牙、128颗侧切牙和149颗尖牙。采用标准的透明技术使牙齿透明。将印度墨汁注入牙齿根管，并用放大镜检查样本。根据韦尔图奇分类法对根管形态进行分类。
本研究中所有切牙均为单根，12.08%的尖牙为双根。我们发现切牙中第二根管的发生率略高于尖牙（36.62%对20.48%）。然而，尖牙有两个独立根尖孔的概率高于切牙（12.08%对0.64%）。
鉴于本研究中发现下颌前牙双根管的发生率较高，在彻底检查证明并非如此之前，谨慎的做法是假定任何正在接受治疗的下颌前牙为双根管。
