Alfawaz Hussam, Alqedairi Abdullah, Al-Dahman Yousef Hamad, Al-Jebaly Asma Suliman, Alnassar Faisal Abdullah, Alsubait Sara, Allahem Ziyad
Endodontic Division, Department of Restorative Dental Sciences, College of Dentistry, King Saud University, Riyadh, Saudi Arabia.
Endodontic Division, Restorative Department, Riyadh Elm University, Saudi Arabia.
Saudi Dent J. 2019 Jan;31(1):137-142. doi: 10.1016/j.sdentj.2018.10.005. Epub 2018 Nov 3.
To investigate the root canal morphology of mandibular first and second premolars using Cone-Beam Computed Tomography (CBCT) in a Saudi population.
CBCT images of 707 patients, number of roots and canal configuration were identified and categorized according to Vertucci classification. Bilateral symmetry and association between gender and number of roots, as well as gender and root canal configuration were investigated.
Majority of the patients had one root and type I root canal configuration in mandibular first (96.4%) and second premolar (95.6%). All types of canal configurations were observed except Type VII for the mandibular first premolar, and Types VI and VII for the mandibular second premolar. High degree of bilateral symmetry was seen in both mandibular first and second premolars in terms of the number of roots and canal configuration; 93.8% and 97.8%, respectively. There was an association between gender and number of roots (P = 0.04) and gender and root canal configuration in mandibular first premolar (P = 0.030).
Single-root with type I canal configuration was the most prevalent of mandibular premolars in the Saudi population. However, incidence of more than one root with different canal configurations was detected.
使用锥形束计算机断层扫描（CBCT）研究沙特人群下颌第一和第二前磨牙的根管形态。
对707例患者的CBCT图像进行分析，根据Vertucci分类法确定牙根数量和根管形态并进行分类。研究双侧对称性以及性别与牙根数量、性别与根管形态之间的关联。
大多数患者的下颌第一前磨牙（96.4%）和第二前磨牙（95.6%）有一个牙根且根管形态为I型。除下颌第一前磨牙的VII型以及下颌第二前磨牙的VI型和VII型外，观察到了所有类型的根管形态。在下颌第一和第二前磨牙的牙根数量和根管形态方面均呈现高度的双侧对称性，分别为93.8%和97.8%。下颌第一前磨牙的性别与牙根数量（P = 0.04）以及性别与根管形态之间存在关联（P = 0.030）。
在沙特人群中，单根且根管形态为I型的下颌前磨牙最为常见。然而，也检测到了具有不同根管形态的多根情况。
