Al Rammahi Hasan Mohsen, Chai Wen Lin, Ahmed Hany Mohamed Aly
Department of Conservative Dentistry, Faculty of Dentistry, University of Babylon, Babylon, Iraq; Department of Restorative Dentistry, Faculty of Dentistry, University of Malaya, Kuala Lumpur, Malaysia.
Department of Restorative Dentistry, Faculty of Dentistry, University of Malaya, Kuala Lumpur, Malaysia.
Eur Endod J. 2025 May;10(3):188-197. doi: 10.14744/eej.2025.00922.
This study investigated the morphology of accessory canals in the mandibular first molar of a Malaysian subpopulation.
A total of 140 mandibular first molars were scanned using micro-computed tomography. The accessory canals for each of the mesial and distal roots were classified according to Ahmed et al. system based on location (coronal, middle and apical thirds) and type (patent, blind, loop and delta). A total of thirty mandibular first molar teeth were used for calibration. The Chi-square and Chi-square goodness-fit tests were used to assess the association between the categorical variables. The significance was set at 0.05 (p<0.05).
Results showed that the prevalence of accessory canal is 80.71%. The apical third was the most common location for accessory canals in the mesial (79.3%) and distal (75.9%) roots (p<0.001). Amongst accessory canal types, the patent type was the most common (76.43% and 71.43%, respectively) with the codes of M(A1), D(A1). No significant association was found between root type and the presence of the accessory canals (p=0.071). A significant difference was found in the type of accessory canals and the location within the root (p<0.001).
In this population, the mandibular first molars showed a high prevalence of accessory canals in the mesial and distal roots. Patent accessory canals in the apical third are the most common in both roots followed by apical delta. (EEJ-2024-10-163).
本研究调查了马来西亚亚人群下颌第一磨牙副根管的形态。
使用微型计算机断层扫描对140颗下颌第一磨牙进行扫描。根据艾哈迈德等人的系统，根据位置（冠部、中部和根尖三分之一）和类型（开放、盲端、环状和三角洲状）对近中根和远中根的每条副根管进行分类。共使用30颗下颌第一磨牙进行校准。使用卡方检验和卡方拟合优度检验来评估分类变量之间的关联。显著性设定为0.05（p<0.05）。
结果显示副根管的患病率为80.71%。根尖三分之一是近中根（79.3%）和远中根（75.9%）中副根管最常见的位置（p<0.001）。在副根管类型中，开放型最为常见（分别为76.43%和71.43%），代码为M(A1)、D(A1)。未发现牙根类型与副根管的存在之间存在显著关联（p=0.071）。在副根管类型和牙根内位置之间发现了显著差异（p<0.001）。
在该人群中，下颌第一磨牙的近中根和远中根副根管患病率较高。根尖三分之一的开放型副根管在两根中最为常见，其次是根尖三角洲状副根管。（EEJ-2024-10-163）
