Faraj Bestoon Mohammed
Conservative Department, College of Dentistry, University of Sulaimani, Madame Mitterand Street 30, Kurdistan Region, Sulaimani, 46001, Iraq.
J Dent Sci. 2021 Jan;16(1):91-95. doi: 10.1016/j.jds.2020.06.021. Epub 2020 Jul 18.
BACKGROUND/PURPOSE: One of the most complexes in root and canal anatomy is the maxillary first permanent molar. This study aimed to analyze the frequency of mesiobuccal (MB2) canal and its apical portals of exit, in patients belonging to different gender-age groups and determine the possible relation with sex and age.
A CBCT scan images were accessed from a documented database of 343 patients (178 male, 165 female), who had an oral and maxillofacial examination. The age of the patients ranging from 12 to 63 years. The frequency of the MB2 canal and its portals of exit apically were observed. Age and gender correlation were calculated using the χ2 test. P < 0.05 was considered significant.
A total of 634 maxillary first molars (335 male, 299 female) were included. The MB2 canal was found in 53.78% of the cases. A significantly higher incidence of the MB2 canal was detected in males than in females. No correlation in the presence and/or absence of the MB2 canal in terms of age. When MB2 canal present, a single apical foramen was observed in 66.28% of the cases, two apical foramina were present in 33.72% of the cases.
MB2 canals may be present in approximately half of the cases, from which one third of the cases have their own apical portal of exit.
背景/目的：上颌第一恒磨牙是根管解剖结构中最复杂的牙齿之一。本研究旨在分析不同性别年龄组患者中近中颊侧（MB2）根管及其根尖孔的出现频率，并确定其与性别和年龄的可能关系。
从343例接受口腔颌面检查患者（178例男性，165例女性）的文献数据库中获取锥形束计算机断层扫描（CBCT）图像。患者年龄在12至63岁之间。观察MB2根管及其根尖孔的出现频率。采用χ2检验计算年龄与性别的相关性。P < 0.05被认为具有统计学意义。
共纳入634颗上颌第一磨牙（335颗男性，299颗女性）。53.78%的病例发现有MB2根管。男性MB2根管的发生率显著高于女性。MB2根管的有无与年龄无关。当存在MB2根管时，66.28%的病例观察到单一根尖孔，33.72%的病例存在两个根尖孔。
约半数病例可能存在MB2根管，其中三分之一的病例有其自身的根尖孔。
