サウジアラビアの人口における下顎第二小臼歯の根管形態：最近のコーディングシステムを用いたコーンビームCT分析

Ahmed A Alelyani¹

¹Department of Restorative Dentistry, Division of Endodontics, College of Dentistry, Najran University, Najran, Saudi Arabia, e-mail: aaalelyani@nu.edu.sa, Orcid: https://orcid.org/0009-0003-5260-8210.

The journal of contemporary dental practice

|January 12, 2026

要旨

Aim:

The present study aimed to evaluate the root and canal anatomy of mandibular (MAND) second premolars in a southern Saudi population using high-resolution cone-beam computed tomography (CBCT) imaging and the recent coding system.

Materials And Methods:

A total of 856 MAND second premolars from 614 CBCT scans were retrospectively analyzed. These scans were evaluated in axial, coronal, and sagittal planes. Then, the MAND second premolars were classified according to root number and canal configuration using the coding system developed by Ahmed and Dummer. Statistical analyses were conducted to assess associations among canal anatomy, gender, and age. A p-value < 0.05 was considered statistically significant.

Results:

The majority of MAND second premolars exhibited the single-root with a single canal (¹TN¹) configuration, which was observed in 834 (97.43%) of the sample. Moreover, most teeth (847, 98.95%) had a single root, and two-rooted (8, 0.93%) and three-rooted (1, 0.12%) cases were rare. No statistically significant differences were found between males and females or among different age-groups (p > 0.05), although the 30-40 age-group exhibited the largest anatomical variation.

Conclusion:

The present CBCT-based study concluded that the ¹TN¹ canal configuration is the most prevalent in MAND second premolars. While the most predominant is a single root with a single canal, the study also confirms the existence of complex anatomical variations. Gender and age-group did not have a statistically significant impact on root canal anatomy.

Clinical Significance:

Accurate knowledge of MAND second premolar morphology is essential for successful endodontics. Population-specific data and CBCT with a recent coding system enhance diagnosis and support better clinical outcomes. How to cite this article: Alelyani AA. Root Canal Morphology of Mandibular Second Premolars in a Saudi Population: Cone-beam Computed Tomography Analysis with a Recent Coding System. J Contemp Dent Pract 2025;26(10):970-976.

キーワード:

コーンビームCT 下顎根管形態第二小臼歯

さらに関連する動画

10:50

A Finite Element Approach for Locating the Center of Resistance of Maxillary Teeth

Published on: April 8, 2020

10.1K

07:14

Guided Endodontics: Three-Dimensional Planning and Template-Aided Preparation of Endodontic Access Cavities

Published on: May 24, 2022

5.1K

関連する概念動画

01:21

Tooth Anatomy

2.0K

The human tooth enables us to eat a variety of foods, speak clearly, and even aid in shaping our faces. Teeth are composed of various elements that work together. Here's a detailed look at the anatomy of a human tooth.
The Crown, Neck, and Root
The visible part of the tooth is referred to as the crown. It's covered by enamel, the hardest substance in the human body. The crown is uniquely shaped for each type of tooth, allowing for different functions such as cutting, tearing, or...

2.0K

01:15

Teeth

1.6K

The formation of teeth, also known as odontogenesis, is a complex process that begins in utero, around the sixth week of embryonic development. There are three stages to this process: the bud stage, the cap stage, and the bell stage.
In the bud stage, the tooth germ (an aggregation of cells) starts to form in the developing jawbone. During the cap stage, the tooth germ differentiates into enamel organ, dental papilla, and dental sac, which will later develop into the tooth's enamel, dentin...

1.6K