Investigation of mandibular second molar root and canal morphology in a Black South African population using cone-beam computed tomography and two classification systems.

IF 1.9 4区 医学 Q2 DENTISTRY, ORAL SURGERY & MEDICINE
Journal of oral science Pub Date : 2023-10-01 Epub Date: 2023-08-03 DOI:10.2334/josnusd.23-0123
Glynn D Buchanan, Mohamed Y Gamieldien, Inger Fabris-Rotelli, Albert van Schoor, Andre Uys
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引用次数: 1

Abstract

Purpose: To investigate the root and canal morphology of mandibular second molars, including anatomical variations, in a Black South African population using two classification systems.

Methods: Cone-beam computed tomography images of 386 teeth were evaluated. The number of roots and canal configurations were categorized using the classifications of Vertucci (with modifications by Sert and Bayirli) and Ahmed et al. (including the modified Melton classification). Relationships between variables were assessed using Fisher's exact test (P < 0.05).

Results: Mandibular second molars were predominantly two-rooted (91.7%). The majority of teeth had three canals including Type IV mesial (41.2%) and Type I (75.1%) distal (Ahmed et al. configuration: 2MDM M2 D1). Three or more canals were present in almost one-fifth of mesial (n = 72/386, 18.6%) and a small number of distal (n = 21/386, 5.4%) roots. Males displayed additional canals more frequently in the distal root (P = 0.02). C-shaped anatomy was found in 5.7%. Among the C-shapes, the most common was Melton's Type III in the coronal (50%), middle (81%) and apical (72%) thirds.

Conclusion: In this population, mandibular second molar teeth exhibited diverse morphology, which would have clinical significance for endodontic practitioners. The Ahmed et al. classification provided a better description than the Vertucci classification.

使用锥形束计算机断层扫描和两种分类系统对南非黑人人群下颌第二磨牙根管形态的调查。
目的:使用两种分类系统研究南非黑人人群下颌第二磨牙的根管形态,包括解剖学变异。方法:对386颗牙齿的锥束计算机断层扫描图像进行评价。根和根管形态的数量使用Vertucci(经Sert和Bayirli修改)和Ahmed等人(包括修改后的Melton分类)的分类进行分类。使用Fisher精确检验评估变量之间的关系(P<0.05)。结果:下颌第二磨牙主要为两根(91.7%)。大多数牙齿有三个管,包括IV型近中管(41.2%)和I型远中管(75.1%)(Ahmed等人,配置:2MDM M2 D1)。近五分之一的近中根(n=72/386,18.6%)和少量远端根(n=21/386,5.4%)存在三个或更多根管。男性在远端根中更多地显示出额外的根管(P=0.02)。5.7%的患者发现了C形解剖结构。在C形中,最常见的是Melton III型,位于冠状(50%)、中间(81%)和根尖(72%)三分之一。结论:在这一人群中,下颌第二磨牙表现出不同的形态,这对牙髓科医生具有临床意义。Ahmed等人的分类提供了比Vertucci分类更好的描述。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Journal of oral science
Journal of oral science DENTISTRY, ORAL SURGERY & MEDICINE-MATERIALS SCIENCE, BIOMATERIALS
CiteScore
3.80
自引率
0.00%
发文量
58
期刊介绍: Information not localized
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