Hasheminia Seyed Mohsen, Khazaei Saber, Iranmanesh Pedram, Kolahi Jafar, Rasteh Bita, Behdarvandi Masoumeh
Department of Endodontics, Dental Research Center, Dental Research Institute, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran.
Department of Endodontics, School of Dentistry, Kermanshah University of Medical Sciences, Kermanshah, Iran.
PLoS One. 2025 Jul 11;20(7):e0327006. doi: 10.1371/journal.pone.0327006. eCollection 2025.
One of the main reasons for the failure of root canal treatment in maxillary molars is missing the second mesiobuccal (MB2) canal. This systematic review and meta-analysis aimed to estimate the prevalence of the MB2 canal in maxillary molars in the Iranian population.: Cross-sectional studies on the prevalence of MB2 canal in maxillary molars in the Iranian population were searched in PubMed, Scopus, Magiran, SID, IranMedex, and Google Scholar databases until 31 May 2024. The JBI Critical Appraisal Tool for prevalence studies was utilized for quality assessment. The prevalence of the MB2 canal was estimated with a 95% confidence coefficient (95%CI) using STATA18 software and the inverse variance method, separately for the first and second molars (CRD42024542862).In the present study, the prevalence of the MB2 canal in the maxillary first molar was 60% (95%CI, 53_67; I2 = 97.14%) and 33% (95%CI, 25_42; I2 = 97.42%) in the maxillary second molar. The highest prevalence rate of the MB2 canal in the maxillary first and second molars related to the microscope with 78% (95%CI, 54_101; I2 = 97.96%) and 61% (95%CI, 20_102%; I2 = 97.43%), respectively. The lowest prevalence rate of the MB2 canal in the maxillary first and second molars was related to the periapical radiograph with a rate of 15% (95%CI, -10_40; I2 = 91.17%) and 4% (95% CI, -8_17; I2 = 40.52%), respectively. The prevalence of the MB2 canal in the Iranian population in the first and second molars was 60% and 33%, respectively. This prevalence rate depended on the assessment methods.
上颌磨牙根管治疗失败的主要原因之一是遗漏了第二近中颊根管（MB2）。本系统评价和荟萃分析旨在评估伊朗人群上颌磨牙中MB2根管的发生率。：在PubMed、Scopus、Magiran、SID、IranMedex和谷歌学术数据库中检索截至2024年5月31日关于伊朗人群上颌磨牙MB2根管发生率的横断面研究。采用JBI患病率研究批判性评价工具进行质量评估。使用STATA18软件和逆方差法，分别对第一磨牙和第二磨牙以95%置信系数（95%CI）估计MB2根管的发生率（CRD42024542862）。在本研究中，上颌第一磨牙中MB2根管的发生率为60%（95%CI，53_67；I2 = 97.14%），上颌第二磨牙中为33%（95%CI，25_42；I2 = 97.42%）。上颌第一磨牙和第二磨牙中MB2根管的最高发生率与显微镜相关，分别为78%（95%CI，54_101；I2 = 97.96%）和61%（95%CI，20_102%；I2 = 97.43%）。上颌第一磨牙和第二磨牙中MB2根管的最低发生率与根尖片相关，发生率分别为15%（95%CI，-1至40；I2 = 91.17%）和4%（95%CI，-8_17；I2 = 40.52%）。伊朗人群中第一磨牙和第二磨牙MB2根管的发生率分别为60%和33%。该发生率取决于评估方法。
