contemporary orofacial science

en Evaluation of root number and anatomical configuration of maxillary second molar canals using CBCT اندودانتیکس Endodontics پژوهشي Research <div style="text-align: justify;">Background: The root canal treatment of the maxillary second molar tooth is one of the challenging cases in root canal treatment because it has many anatomical variations. The purpose of this study was to investigate root number and anatomical configuration of maxillary second molar canals using  the Cone Beam Computed Tomography method. Materials & Methods: In this descriptive-analytical study, 165 CBCT images of maxillary second molars from patients aged 18 years or older, available in the archives of the Department of Oral and Maxillofacial Radiology, Azad University of Isfahan were used. CBCT images were evaluated in axial, sagittal, and coronal sections at two separate time points with a defined interval, and the data for each tooth were recorded in specially designed forms. The data were analysed by the Chi-square test (α=0.05). Results: Most of the maxillary second molars had three roots (81.2%). Two roots were observed in 9.7% of teeth, and single-rooted teeth were found in 6.7% of second molars, and 2.4% had four roots. 63.6% of single-rooted teeth had one canal, and 36.4% had two canals. Most of the teeth with two roots had three canals (81.2%), and 18.8% had two canals. 86.6% of teeth with three roots had four canals, and 13.4% had three canals. A C-type configuration was found in a single-rooted tooth with a single canal. Conclusion: The most common variations were three-rooted and four-canalled teeth. The least anatomical variety of the root and canal was teeth with two roots and two canals. Mesiobuccal roots in three-rooted and four-canal teeth showed the greatest anatomical diversity according to Vertucci’s classification. Only one case of C-type canal was found.  </div> 29 35 http://cofs.khuisf.ac.ir/browse.php?a_code=A-10-1-72&slc_lang=en&sid=1 Farnoosh Mobininejad 10031947532846001202 10031947532846001202 No Faculty of Dentistry, Isf.c, Islamic Azad University, Isfahan, Iran Maryam Zare Jahormi 10031947532846001203 10031947532846001203 Yes Department of Endodontics, Faculty of Dentistry, Isf.c, Islamic Azad University, Isfahan, Iran Azadeh Torkzadeh 10031947532846001204 10031947532846001204 No Department of Oral & Maxillofacial Radiology, Faculty of Dentistry, Isf.c, Islamic Azad University, Isfahan, Iran Mohammad Hossein Moarefpour 10031947532846001205 10031947532846001205 No Department of Endodontics, Faculty of Dentistry, Isf.c, Islamic Azad University, Isfahan, Iran zahra Sadat Mohajer Hejazi 10031947532846001206 10031947532846001206 No Faculty of Dentistry, Isf.c, Islamic Azad University, Isfahan, Iran