牙根形状对下颌磨牙根尖手术切除水平的牙管复杂性的影响:显微 CT 研究

IF 2.2 4区 医学 Q2 DENTISTRY, ORAL SURGERY & MEDICINE Archives of oral biology Pub Date : 2024-04-27 DOI:10.1016/j.archoralbio.2024.105983
António Ginjeira , Filipa Neto , Shirin Behdad , Inês Farinha , Nuno Gonçalves , Jorge N.R. Martins , Mariana Pires , Mário Rito Pereira , Isabel Vasconcelos , Isabel Duarte
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引用次数: 0

摘要

目的 本研究旨在探讨下颌磨牙根尖 3 mm 水平的长宽比与其根管复杂性之间的关系。 设计 本研究使用显微 CT 成像技术分析了 163 颗双根下颌磨牙。根尖 3 毫米处牙根的长宽比分为"< 2.75 "或"≥ 2.75"(中侧)和"< 1.75 "或"≥ 1.75"(远侧)。二维(2D)分析侧重于四个根尖轴向横截面水平,以确定是否存在主牙道、附属牙道和峡部。此外,还对两个牙根顶端 4 毫米处进行了三维(3D)评估,检查了主根管和附属根管、根尖孔、根尖三角区和中中层根管。结果与 3 毫米水平的纵横比为 < 2.75 的牙根相比,纵横比≥ 2.75 的中中层牙根在所有水平上都显示出较多的主根管。此外,纵横比≥2.75组显示出更多的附属管,附属管的平均数量也更高。三维评估证实,≥ 2.75 组的附属根管和根尖孔明显更多。在≥2.75组中,根尖三角洲的发生率几乎翻了一番,而且该组中只发现了中中根。在牙根远端,≥ 1.75 组在所有轴向水平上的主根管数量都明显较多。结论 较高的牙根纵横比与较高的解剖复杂性有关。
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Influence of root shape on canal complexity at the mandibular molar apical surgical resection level: A micro-CT study

Objectives

This study aimed to investigate the relationship between the aspect ratios of mandibular molar roots at the apical 3-mm level and their root canal complexity.

Design

This study used micro-CT imaging to analyze 163 two-rooted mandibular molars. The aspect ratios of the roots at the apical 3-mm level were categorized as "< 2.75" or "≥ 2.75" (mesial) and "< 1.75" or "≥ 1.75" (distal). A two-dimensional (2D) analysis focused on four apical axial cross-section levels to determine the presence of main and accessory canals and isthmus. Additionally, a three-dimensional (3D) assessment of the apical 4-mm of both roots examined main and accessory canals, apical foramina, apical deltas, and middle mesial canals.

Results

Mesial roots with aspect ratios ≥ 2.75 showed a higher number of main canals at all levels compared to those with aspect ratios < 2.75 at the 3-mm level. Additionally, the ≥ 2.75 group exhibited more accessory canals and a higher average number of accessory canals. The 3D assessment confirmed significantly more accessory canals and apical foramina in the ≥ 2.75 group. The prevalence of roots with apical deltas was nearly double in the ≥ 2.75 group, and middle mesial canals were exclusively found in this group. In the distal root, the ≥ 1.75 group showed a significantly higher number of main canals at all axial levels. No significant differences were observed between groups in terms of accessory canals, apical foramina, or deltas.

Conclusions

A higher root aspect ratio is related to higher anatomical complexity.

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来源期刊
Archives of oral biology
Archives of oral biology 医学-牙科与口腔外科
CiteScore
5.10
自引率
3.30%
发文量
177
审稿时长
26 days
期刊介绍: Archives of Oral Biology is an international journal which aims to publish papers of the highest scientific quality in the oral and craniofacial sciences. The journal is particularly interested in research which advances knowledge in the mechanisms of craniofacial development and disease, including: Cell and molecular biology Molecular genetics Immunology Pathogenesis Cellular microbiology Embryology Syndromology Forensic dentistry
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