Journal of Research in Dental and Maxillofacial Sciences

en Position of Second Mesiobuccal Canal Relative to Distobuccal and Palatal Canals of Maxillary Molars in an Iranian Population Endodontics Endodontics Original article Original article <div style="text-align: justify;">Background and Aim: This study assessed the position of the second mesiobuccal (MB2) canal relative to the distobuccal (DB) and palatal (P) canals of maxillary molars in an Iranian population using cone-beam computed tomography (CBCT). Materials and Methods: This cross-sectional study evaluated 110 CBCT scans of patients retrieved from a radiology clinic in Isfahan, Iran. The MB1-MB2 inter-orifice distance, and the angle formed between the MB1-MB2 line and the DB-P line were measured on reconstructed axial sections. The angulation of MB2 orifice relative to the DB and P canals was categorized as positive, negative, and parallel. Data were compared by Student t-test, Fisher’s exact test, and Chi-square test (alpha=0.05).  Results: The mean MB1-MB2 inter-orifice distance was not significantly different in first and second molars, in the right and left sides, or in males and females (P>0.05). Negative angulation of MB2 orifice relative to the DB and P canals had the highest frequency (72.7%) followed by positive angulation (23.6%). Angulation of MB2 orifice had no significant correlation with tooth type (first/second molar), laterality, or gender (P>0.05). Conclusion: The mean MB1-MB2 inter-orifice distance had no significant correlation with tooth type, laterality, or gender. Negative angulation of the MB2 relative to the DB and P canals had the highest frequency, indicating that if a hypothetical line is drawn from the MB1 orifice parallel to the DB-P line, the MB2 orifice would be probably at the distal of this line. Angulation of MB2 orifice had no significant correlation with tooth type, laterality, or gender.  </div> Maxilla, Molar, Cone-Beam Computed Tomography 34 39 http://jrdms.dentaliau.ac.ir/browse.php?a_code=A-10-1291-1&slc_lang=en&sid=1 Sina Mosadeghian smosadeghian@gmail.com 100319475328460013973 100319475328460013973 No Department of Oral and Maxillofacial Radiology, Dental School, Isfahan (Khorasgan) Branch, Islamic Azad University, Isfahan, Iran Azadeh Torkzadeh Azadehh.Torkzadeh@Gmail.com 100319475328460013974 100319475328460013974 Yes Department of Oral and Maxillofacial Radiology, Dental School, Isfahan (Khorasgan) Branch, Islamic Azad University, Isfahan, Iran Parisa Ranjbarian p.ranjbarian@khuisf.ac.ir 100319475328460013975 100319475328460013975 No Department of Endodontics, Dental School, Isfahan (Khorasgan) Branch, Islamic Azad University, Isfahan, Iran Roya Asaadi asaadi.roya@gmail.com 100319475328460013976 100319475328460013976 No Department of Oral and Maxillofacial Radiology, Dental School, Isfahan (Khorasgan) Branch, Islamic Azad University, Isfahan, Iran