Pataer Maliyamuguli, Abulizi Aerman, Jumatai Sakendeke, Zhang Xuelei, Zhang Xiaofang, Zhao Jin
Department of Cariology and Endodontics, The First Affiliated Hospital of Xinjiang Medical University (Affiliated Stomatology Hospital), Urumqi, China.
Stomatological Research Institute of Xinjiang Uyghur Autonomous Region, Urumqi, China.
BMC Med Imaging. 2025 Apr 11;25(1):116. doi: 10.1186/s12880-025-01640-1.
OBJECTIVES: To determine the prevalence of C-shaped root canal system configurations and assess the correlation between C-shaped root canal prevalence and root morphology in mandibular second molars among adults in Xinjiang Uyghur population using cone-beam computed tomography (CBCT). MATERIALS AND METHODS: CBCT imaging data from patients treated at the First Affiliated Hospital of Xinjiang Medical University (Affiliated Stomatology Hospital) were retrospectively analyzed. The prevalence of C-shaped root canal configurations in mandibular second molars was determined based on Fan et al.'s classification. Axial sections of each tooth were evaluated in the coronal, middle, and apical thirds to identify canal configurations and analyze root morphology. The differences in C-shaped canal prevalence between genders and tooth positions were compared. Statistical analysis was performed using the chi-square test (p < 0.05). RESULTS: A total of 1748 patients were included, with 510 (29.17%) exhibiting C-shaped root canals. Females exhibited a higher prevalence (31.49%) than males (25.15%). C-shaped canals were more frequently observed on the lingual surface (76.8%) than the buccal surface (22.2%). Bilateral symmetry of C-shaped canals was observed in 64.7% of cases. A significant association was found between C-shaped canals and root morphology (p < 0.001). Among patients with C-shaped canals, 66.9% demonstrated symmetrical configurations. The most common configuration was C3 (present in all axial levels), followed by C1 and C2. Mandibular second molars with three roots or type 3/type 4 morphologies exhibited a high probability of C-shaped canals. CONCLUSIONS: C-shaped canals were more prevalent in females and lingually positioned in mandibular second molars. Bilateral C-shaped canals were frequently symmetrical and more common than unilateral cases. Mandibular second molars with three-root or type 3/type 4 morphologies may indicate a high likelihood of C-shaped canals. The most common configuration was C3, followed by C1 and C2, all present across all axial levels. Understanding these anatomical variations preoperatively can improve clinical management.
目的：使用锥束计算机断层扫描（CBCT）确定新疆维吾尔族成年人下颌第二磨牙C形根管系统形态的患病率，并评估C形根管患病率与牙根形态之间的相关性。 材料与方法：回顾性分析新疆医科大学第一附属医院（附属口腔医院）接受治疗患者的CBCT影像数据。根据Fan等人的分类确定下颌第二磨牙C形根管形态的患病率。对每颗牙齿的轴向切片在冠方、中部和根尖三分之一处进行评估，以确定根管形态并分析牙根形态。比较性别和牙位之间C形根管患病率的差异。采用卡方检验进行统计分析（p<0.05）。 结果：共纳入1748例患者，其中510例（29.17%）表现为C形根管。女性患病率（31.49%）高于男性（25.15%）。C形根管在舌侧表面（76.8%）比颊侧表面（22.2%）更常见。64.7%的病例观察到C形根管的双侧对称性。发现C形根管与牙根形态之间存在显著关联（p<0.001）。在有C形根管的患者中，66.9%表现为对称形态。最常见的形态是C3（在所有轴向水平均存在），其次是C1和C2。有三根或3/4型形态的下颌第二磨牙出现C形根管的可能性很高。 结论：C形根管在下颌第二磨牙中女性更为常见且位于舌侧。双侧C形根管通常是对称的，比单侧病例更常见。有三根或3/4型形态的下颌第二磨牙可能表明C形根管的可能性很高。最常见的形态是C3，其次是C1和C2，在所有轴向水平均有出现。术前了解这些解剖变异可改善临床处理。
J Coll Physicians Surg Pak. 2023-12
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