Beltes Panagiotis, Kantilieraki Eleni, Kalaitzoglou Maria-Elpida, Beltes Charalampos, Angelopoulos Christos
Department of Endodontology, School of Dentistry, Aristotle University of Thessaloniki, Thessaloniki, Greece.
Department of Dentoalveolar Surgery, Implantology and Radiology, School of Dentistry, Aristotle University of Thessaloniki, Thessaloniki, Greece.
Aust Endod J. 2019 Aug;45(2):184-188. doi: 10.1111/aej.12305. Epub 2018 Sep 19.
The aim of this study was to investigate the root and root canal morphologies of mandibular canines with additional roots using cone-beam computed tomography. Seventy-seven extracted two-rooted and one-three-rooted permanent human mandibular canines were selected. Aspects of the external morphology evaluated were crown length, root length, total length, root bifurcation distance from the cementoenamel junction, root size, and direction of the root curvature in the apical third. Features of internal morphology assessed were root canal number per root, root canal bifurcation distance from the cementoenamel junction, and the angle between the buccal or lingual canal and the main canal. The root size and length presented considerable diversity. Most of the roots bifurcated at the middle third and exhibited a buccal curvature. The main root canal bifurcated coronally in two root canals, a buccal and a lingual. The majority of the buccal and lingual root canal angles were blunt. The presence of a third root in a specimen was a novel finding of this study.
本研究的目的是使用锥形束计算机断层扫描来研究具有额外牙根的下颌尖牙的牙根和根管形态。选择了77颗拔除的双根和一根三根的恒牙人下颌尖牙。评估的外部形态方面包括牙冠长度、牙根长度、总长度、牙根分叉距牙骨质釉质界的距离、牙根大小以及根尖三分之一处牙根弯曲的方向。评估的内部形态特征包括每根牙根的根管数量、根管分叉距牙骨质釉质界的距离，以及颊侧或舌侧根管与主根管之间的角度。牙根大小和长度呈现出相当大的差异。大多数牙根在中三分之一处分叉，并表现出颊侧弯曲。主根管在冠部分为两个根管，一个颊侧根管和一个舌侧根管。大多数颊侧和舌侧根管角度较钝。标本中出现第三根牙根是本研究的一个新发现。
