Corbella Stefano, Baruffaldi Martino, Perondi Isabella, Taschieri Silvio
Department of Biomedical, Surgical, and Dental Sciences, Università degli Studi di Milano, Milan, Italy.
IRCCS Istituto Ortopedico Galeazzi, Milan, Italy.
J Investig Clin Dent. 2019 Feb;10(1):e12373. doi: 10.1111/jicd.12373. Epub 2018 Nov 26.
The aim of the present study was to evaluate the number of roots and the anatomy of root canal systems of permanent mandibular premolars using images derived from cone-beam computed tomography (CBCT) scans.
Mandibular CBCT scans of a cohort of Caucasians (Italians) were evaluated using a dedicated software. The number of roots and the anatomy of root canal systems (following the classification by Vertucci) were recorded, and the prevalence of each type was calculated.
In total, 112 mandibular scans were evaluated accounting for 97 first premolars and 88 second premolars; 94.2% of first premolars and 96.6% of second premolars had one single root. The most common root canal system configuration was type I for both first premolars (79.2%) and second premolars (95.5%). Moreover, a large variability was observed.
Based on the results, mandibular premolars show a significant heterogeneity in root canal system anatomy that could complicate non-surgical endodontic treatment.
本研究旨在利用锥形束计算机断层扫描（CBCT）扫描所得图像，评估恒牙下颌前磨牙的牙根数量及根管系统解剖结构。
使用专用软件对一组高加索人（意大利人）的下颌CBCT扫描图像进行评估。记录牙根数量及根管系统解剖结构（按照韦尔图奇分类法），并计算每种类型的发生率。
共评估了112例下颌扫描图像，其中包括97颗第一前磨牙和88颗第二前磨牙；94.2%的第一前磨牙和96.6%的第二前磨牙有单一根。第一前磨牙（79.2%）和第二前磨牙（95.5%）最常见的根管系统形态均为I型。此外，观察到较大的变异性。
基于这些结果，下颌前磨牙在根管系统解剖结构上表现出显著的异质性，这可能会使非手术牙髓治疗复杂化。
