Program of the Dentistry Course, Dental School of Health and Life Sciences, Pontifical Catholic University of Rio Grande do Sul.
Discipline of Radiology, Dentistry Course, Dental School of Health and Life Sciences, Pontifical Catholic University of Rio Grande do Sul.
J Oral Sci. 2024 Jul 16;66(3):169-175. doi: 10.2334/josnusd.24-0018. Epub 2024 Jun 12.
To identify and measure the distance from the dental apices to the mandibular (MC) and mandibular incisive (MIC) canals, the diameter of the MC and the distances of the mental foramen (MF).
In this retrospective study, cone-beam computed tomography scans of 144 adult patients (males and females) from a dental school in South Brazil were evaluated. Cross-sections were selected on the MC and the MIC paths, perpendicular to the mandibular base, and measurements were taken from the dental apices to the mandibular cortices. The measurement and location of the mandibular and mental foramen on both sides were compared. Paired t-tests compared sides, while Student's t-tests compared sexes (P < 0.05).
The distance from the dental apices to the upper wall of the MC was closest in the third molar and farthest in the central incisor region. In both sexes and sides, the path of the MC is in most cases lingually in the molar regions and moves to the buccal region from the second premolar. The MF emerges in the regions between the premolars or near the second premolar.
The results of this study highlight the importance of evaluating specific individual characteristics of a given population.
确定并测量牙尖至下颌管（MC）和下颌切牙管（MIC）的距离、MC 管的直径以及颏孔（MF）的距离。
本回顾性研究对来自巴西南部一所牙科学院的 144 名成年患者（男性和女性）的锥形束 CT 扫描进行了评估。选择与下颌骨基底垂直的 MC 和 MIC 路径的横截面，并从牙尖测量至下颌皮质。比较了两侧下颌骨和颏孔的测量值和位置。配对 t 检验比较了两侧，而学生 t 检验比较了性别（P<0.05）。
牙尖至上颌 MC 管上壁的距离在第三磨牙处最近，在中切牙区最远。在两性和两侧，MC 管的路径在大多数情况下在磨牙区为舌侧，并从第二前磨牙向颊侧移动。MF 出现在前磨牙之间的区域或靠近第二前磨牙的区域。
本研究的结果强调了评估特定人群个体特征的重要性。
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