Zare Jahromi M, Jafari Golestan F, Mashhadi Esmaeil M, Moouavizahed Sh, Sarami M
Dept. of Dentistry, Khorasgan Branch, Islamic Azad University, Isfahan, Iran.
Dept. of Endodontics, School of Dentistry, Islamic Azad University, Khorasgan Branch, Isfahan, Iran.
J Dent (Shiraz). 2013 Jun;14(2):78-81.
The knowledge of the pulp anatomy plays an important role in the success of endodontic treatments.
The aim of this study was to determine the root and canal morphology of the mandibular second molar teeth in an Iranian population.
One hundred intact human mandibular second molars were collected. The teeth were examined visually and the number of their roots were recorded. The teeth were covered using of lacquer. Access cavities were prepared and the pulp tissue was dissolved by sodium hypochlorite. The apices were covered with the glue and the root canals were injected with the methylene blue and were decalcified with 10% nitric acid, dehydrated with ascending concentrations of alcohol and rendered clear by immersion in methyl salicylate. The following remarks were evaluated: (i) number of root canals per tooth; (ii) number of canals per root; (iii) canal configuration in each root.
Of 100 examined teeth; 6% had one root, 89% had two roots, 2% had three roots and 3% had C-shaped roots. The teeth were classified based on the number of canals: 3 % had single canal, 6 % two canals, 54% three canals, 34% four canals, whilst 3 % had C-shaped roots. Based on the Vertucci classification, the most prevalent canal configuration in the mesial root was type II and in the distal root was type I. Conclusion : Iranian mandibular second molar teeth exhibit features which are similar to the average Jordanian, Caucasian and Burmese root and canal morphology.
牙髓解剖学知识在牙髓治疗的成功中起着重要作用。
本研究的目的是确定伊朗人群下颌第二磨牙的牙根和根管形态。
收集100颗完整的人类下颌第二磨牙。肉眼检查牙齿并记录牙根数量。用清漆覆盖牙齿。制备开髓洞形，用次氯酸钠溶解牙髓组织。用胶水覆盖根尖，用亚甲蓝注入根管，并用10%硝酸脱钙，用浓度递增的酒精脱水，然后浸入冬青油中使其透明。评估以下内容：(i)每颗牙齿的根管数量；(ii)每个牙根的根管数量；(iii)每个牙根的根管形态。
在100颗检查的牙齿中；6%有一个牙根，89%有两个牙根，2%有三个牙根，3%有C形牙根。根据根管数量对牙齿进行分类：3%有单根管，6%有两个根管，54%有三个根管，34%有四个根管，而3%有C形牙根。根据韦尔图奇分类法，近中根最常见的根管形态是II型，远中根是I型。结论：伊朗下颌第二磨牙表现出与约旦人、白种人和缅甸人的平均牙根和根管形态相似的特征。
