An Anatomic Investigation of the Mandibular First Molar Using Micro-Computed Tomography
An Anatomic Investigation of the Mandibular First Molar Using Micro-Computed Tomography
复制标题
DOI：
10.1016/j.joen.2013.06.034
复制
发表时间：
2013-11-01
影响因子：
4.2
通讯作者：
McClanahan, Scott B.
中科院分区：
文献类型：
--
作者：
Harris, Samantha P.;Bowles, Walter R.;McClanahan, Scott B.
简介：下颌第一磨牙是最常见的牙髓治疗的牙齿，是极具解剖挑战性。本显微计算机断层扫描评估的目的是定量研究下颌第一磨牙的形态，以改善顺行和逆行治疗。方法：对22颗下颌第一磨牙进行扫描、重建，并进行各种线性测量。计算每个线性测量的平均值、标准差和平均值的标准误差，并确定每个标称数据类别的模式。结果/结论：整个近中牙根的分叉面应被视为“危险区”。“近中根管在形态上比远中根管变化更大，而近中根管开口的相对位置在离髓底1.5 mm处相对一致。根端切除3 mm将去除大部分侧管和根尖分支。
Introduction: The mandibular first molar is the most frequently endodontically treated tooth and is extremely anatomically challenging. The purpose of this micro-computed tomographic evaluation was to quantitatively investigate the morphology of the mandibular first molar to improve both orthograde and retrograde treatment. Methods: Twenty-two mandibular first molars were scanned, reconstructed, and subjected to various linear measurements. The average, standard deviation, and standard error of the mean of each linear measurement were calculated, and the mode for each nominal data category was determined. Results/Conclusions: The furcal aspect of the entire mesial root should be considered a "danger zone." Mesial canals were found to be much more variable than distal canals in morphology, whereas the relative position of the orifices of the mesial canals was relatively consistent at 1.5 mm from the pulpal floor. Root-end resection of 3 mm would remove the majority of lateral canals and apical ramifications.