下颌侧切牙复杂根管形态与下颌第一磨牙远中舌侧根的存在相关：一项在台湾人群中进行的锥形束 CT 研究。

Complicated Root Canal Morphology of Mandibular Lateral Incisors Is Associated with the Presence of Distolingual Root in Mandibular First Molars: A Cone-beam Computed Tomographic Study in a Taiwanese Population.

机构信息

Department of Operative Dentistry and Endodontics, School of Dentistry, Tri-Service General Hospital and National Defense Medical Center, New Taipei City, Taiwan.

Department of Periodontology, School of Dentistry, Tri-Service General Hospital and National Defense Medical Center, New Taipei City, Taiwan.

出版信息

J Endod. 2018 Jan;44(1):73-79.e1. doi: 10.1016/j.joen.2017.08.027. Epub 2017 Nov 1.

DOI:10.1016/j.joen.2017.08.027

PMID:29079050

Abstract

INTRODUCTION

The aim of this study was to assess the root canal configurations in permanent mandibular lateral incisors (PMLIs) and the correlation between the root canal configurations of PMLIs with the appearance of a distolingual root (DLR) in permanent mandibular first molars (PMFMs) using cone-beam computed tomographic (CBCT) imaging.

METHODS

A total of 1200 CBCT images (300 patients) of PMFMs and PMLIs were investigated. The frequency and distribution of DLRs in PMFMs along with root canal configurations of PMLIs were assessed ipsilaterally and contralaterally. Multivariable logistic regression analysis was used to evaluate the correlation between the root canal configurations of PMLIs with the appearance of a DLR in PMFMs.

RESULTS

The prevalence of PMFMs with a DLR was 24.3%, and the incidence of complicated root canal configurations in PMLIs was 25.0%. The most prevalent root canal systems of PMLIs were Vertucci types I (75%) and III (23.0%). The incidence of complicated root canal configurations in PMLIs was 19.5% in the non-DLR group (ie, no DLR was found on either side of the PMFMs), 33.3% in the unilateral DLR (Uni-DLR) group (ie, a DLR was found in 1 of the PMFMs [the left or right side] and a DLR was not found on the other PMFM), and 39.8% in the bilateral DLR (Bil-DLR) group (ie, a DLR was found in both the right and left PMFMs). After adjusting for categoric variables including sex, age, and side, the odds ratios for the frequency of complicated root canal configurations of PMLIs in the Uni-DLR and Bil-DLR groups compared with the non-DLR group were 2.12 (P = .003) and 2.707 (P < .001), respectively.

CONCLUSIONS

The simultaneous appearance of DLRs in PMFMs and complicated root canal configurations in PMLIs is prominent in Taiwanese individuals. Clinicians should be aware of the correlation between the anatomic variants of PMFMs and PMLIs, which are important before endodontic treatment.

摘要

介绍

本研究旨在通过锥形束 CT（CBCT）成像评估下颌恒侧切牙（PMLI）的根管形态，并分析 PMLI 的根管形态与下颌恒第一磨牙（PMFM）远中舌侧根（DLR）的出现之间的相关性。

方法

共调查了 300 名患者的 1200 份 PMFM 和 PMLI 的 CBCT 图像。评估了 PMFM 中 DLR 的出现频率和分布，以及 PMLI 的根管形态在同侧和对侧的分布。采用多变量逻辑回归分析评估 PMLI 的根管形态与 PMFM 中 DLR 出现之间的相关性。

结果

PMFM 中 DLR 的患病率为 24.3%，PMLI 中复杂根管形态的发生率为 25.0%。PMLI 最常见的根管系统为 Vertucci Ⅰ型（75%）和Ⅲ型（23.0%）。非 DLR 组（即 PMFM 双侧均未发现 DLR）中 PMLI 复杂根管形态的发生率为 19.5%，单侧 DLR 组（即 PMFM 单侧发现 DLR，另一侧未发现 DLR）为 33.3%，双侧 DLR 组（即 PMFM 双侧均发现 DLR）为 39.8%。调整性别、年龄和侧别等分类变量后，单侧 DLR 和双侧 DLR 组 PMLI 复杂根管形态的频率与非 DLR 组相比，比值比分别为 2.12（P=0.003）和 2.707（P<0.001）。