Marceliano-Alves Marília F, de Coutinho Thais Machado Carvalho, Ronquete Vivian, Goulard Paula Avelar Ribeiro, do Nascimento Larissa Moraes Gabriel, de Almeida Dos Santos Antoine, Lopes Ricardo Tadeu, Lins Renata Ximenes, da Silva Limoeiro Ana Grasiela, Nascimento Wayne Martins, Amoroso-Silva Pablo Andres
Iguaçu University, Nova Iguaçu, Brazil.
Rio de Janeiro Federal University, Rio de Janeiro, Brazil.
Aust Endod J. 2023 Sep;49 Suppl 1:1-8. doi: 10.1111/aej.12682. Epub 2022 Sep 4.
To evaluate the internal morphology of 100 distal roots of mandibular first molars using micro-CT. Teeth were scanned to characterise: Vertucci type, root length, canal shape, presence and location of accessory canals, and the number of foramina at 4 mm from the apex, presence of root isthmus and the length from the primary canal to the apical foramen. Vertucci type I was found in 57% of cases, followed by V (27%). The most common cross-section 1 mm from the apex was oval (49%) and circular (38%). The average root length was 16.06 mm (16.61-19.02 mm). The mean foramen size was 0.32 and 0.53 mm for the minor and major diameters, respectively. The volume, surface area and SMI were 7.84 mm , 68.87 mm and 1.52 mm, respectively. Root isthmi were found in 47% of the samples, and the length mean from the primary canal to the apical foramen was 2,03 mm. The internal morphology of the distal roots of mandibular first molars may be complex and shows variations.
使用显微CT评估100颗下颌第一磨牙远中根的内部形态。对牙齿进行扫描以确定：韦尔图奇分型、牙根长度、根管形态、副根管的存在及位置、根尖4毫米处的根尖孔数量、根峡的存在情况以及从主根管到根尖孔的长度。57%的病例为韦尔图奇I型，其次是V型（27%）。根尖1毫米处最常见的横截面是椭圆形（49%）和圆形（38%）。平均牙根长度为16.06毫米（范围为16.61 - 19.02毫米）。较小和较大直径的根尖孔平均尺寸分别为0.32毫米和0.53毫米。体积、表面积和结构模型指数分别为7.84立方毫米、68.87平方毫米和1.52毫米。47%的样本中发现了根峡，从主根管到根尖孔的平均长度为2.03毫米。下颌第一磨牙远中根的内部形态可能复杂且存在变异。
