Chourasia Hemant Ramesh, Meshram Ganesh K, Warhadpande Manjusha, Dakshindas Darshan
Department of Conservative Dentistry and Endodontics, Peoples College of Dental Sciences and Research Centre, Bhanpur, Bhopal 462037, India.
Int J Dent. 2012;2012:745152. doi: 10.1155/2012/745152. Epub 2012 Jan 11.
An in vitro study was performed to determine the number of roots, root canals per tooth, root canal configurations, and frequency of isthmi and apical deltas in mandibular first permanent molars in an Indian population. Hundred and fifty mandibular first permanent molars were collected and subjected to clearing technique. The cleared teeth were examined in a stereomicroscope under 7.5x magnifications. The canal configurations were categorized using Vertucci's classification. Overall 94.6% of the mandibular first molars had two roots, and 5.3% had extradistal roots (distolingual root). In addition, 64% of the specimens had three root canals, and 36% had four root canals. The most common canal configurations of mesial and distal roots were Vertucci type IV (54%) and type I (65.3%), respectively. Clinician should be aware of the complex root canal morphology of mandibular first molars among the Indian population before and during the root canal treatment.
进行了一项体外研究，以确定印度人群下颌第一恒磨牙的牙根数量、每颗牙齿的根管数量、根管形态以及峡部和根尖分歧的发生率。收集了150颗下颌第一恒磨牙并采用透明技术进行处理。在体视显微镜下以7.5倍放大倍数检查透明后的牙齿。根管形态采用韦尔图奇分类法进行分类。总体而言，94.6%的下颌第一磨牙有两个牙根，5.3%有额外远中根（远舌根）。此外，64%的标本有三个根管，36%有四个根管。近中根和远中根最常见的根管形态分别为韦尔图奇IV型（54%）和I型（65.3%）。临床医生在根管治疗前和治疗过程中应了解印度人群下颌第一磨牙复杂的根管形态。
