Nikkerdar Nafiseh, Golshah Amin, Mahmoodivesali Razieh, Falah-Kooshki Sepideh
Department of Oral and Maxillofacial Radiology, School of Dentistry, Kermanshah University of Medical Sciences, Kermanshah, Iran.
Department of Orthodontic, School of Dentistry, Kermanshah University of Medical Sciences, Kermanshah, Iran.
Contemp Clin Dent. 2022 Apr-Jun;13(2):125-134. doi: 10.4103/ccd.ccd_624_20. Epub 2022 Jun 21.
This study was aimed to assess the implant-related anatomical landmarks in the mandibular interforaminal region in an Iranian population using cone-beam computed tomography (CBCT).
In this retrospective cross-sectional study, 378 CBCT images of the mandible were evaluated for the presence of the incisive canal, anterior loop of the inferior alveolar nerve (IAN), mandibular canal, mental foramen, and incisive canal. The effect of age and gender of patients on the abovementioned variables was also evaluated. Data were analyzed using independent -test, analysis of variance, and Chi-square test.
The anterior loop and the incisive canal were present in 36.24% and 97.62% of the cases, respectively. The mean length of the anterior loop and the incisive canal was 2.70 ± 1.20 mm and 12 ± 3.29 mm in the right, and 2.86 ± 1.24 mm and 12.21 ± 3.38 mm in the left side, respectively. The mean diameter of the mental foramen and incisive canal was 4.25 ± 1.08 mm and 1.89 ± 0.46 mm in the right, and 4.21 ± 1.02 mm and 1.94 ± 0.45 mm in the left side, respectively. The descending path was the most common path of the incisive canal. The distance from the incisive canal to the buccal plate and inferior border of the mandible was significantly shorter in females ( < 0.001).
Considering the high variability and clinical significance of the incisive canal and anterior loop of the IAN, and their high prevalence, it is recommended to assess the presence/absence of these structures in the interforaminal region of the mandible on CBCT scans before surgical procedures in this region.
本研究旨在使用锥形束计算机断层扫描（CBCT）评估伊朗人群下颌孔间区域与种植体相关的解剖标志。
在这项回顾性横断面研究中，对378张下颌骨CBCT图像进行评估，以确定切牙管、下牙槽神经（IAN）前袢、下颌管、颏孔和切牙管的存在情况。还评估了患者年龄和性别对上述变量的影响。使用独立样本t检验、方差分析和卡方检验对数据进行分析。
前袢和切牙管的出现率分别为36.24%和97.62%。右侧前袢和切牙管的平均长度分别为2.70±1.20毫米和12±3.29毫米，左侧分别为2.86±1.24毫米和12.21±3.38毫米。右侧颏孔和切牙管的平均直径分别为4.25±1.08毫米和1.89±0.46毫米，左侧分别为4.21±1.02毫米和1.94±0.45毫米。下行路径是切牙管最常见的走行路径。女性中切牙管至下颌骨颊板和下缘的距离明显较短（P<0.001）。
鉴于切牙管和IAN前袢的高度变异性和临床意义以及它们的高发生率，建议在该区域进行外科手术前，通过CBCT扫描评估下颌孔间区域这些结构的有无。
