解剖参数对c形管中电子顶点定位器精度的影响:一种新型微ct分析方法。

IF 3.6 2区 医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE
Kuan-Wei Tung, Hajime Sasaki, Bruno Cavalcanti, Richard Gardner, Neville McDonald
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引用次数: 0

摘要

目的:本研究采用一种新型的微计算机断层扫描(Micro-CT)方法,结合Feret直径,评估两种电子尖定位器(Raypex 6和Root ZX II)在c形管下颌磨牙上的解剖参数对定位精度的影响。方法:采用目测法测量根管实际长度(RCL)。采用Raypex 6和Root ZX II分别测定根尖孔(AF)和根尖狭窄(AC)的电子管长(ECL)和电子工作长度(EWL)。根工作长度(RWL)是根工作长度(RWL)与根工作长度(RWL)相减,以此作为评价根工作长度准确性的参考。解剖参数来自Micro-CT扫描,包括AC和AF的Feret直径,AC-AF距离,是否存在副管,c型类型,AF位置和AC形态。统计分析包括Fisher精确检验和多项逻辑回归。结果:42颗c型磨牙,119根根管。Raypex 6和Root ZX II分别在97.5%和96.4%的管中测定±0.5 mm内的AF。结论:Raypex 6和Root ZX II对c型管型下颌磨牙房颤的检测准确,但对AC的检测不可靠。AC精度降低与多个AC形态相关,表明EALs可能会检测到根管顶端的第一个狭窄部分,而不是最狭窄的部分。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Influence of Anatomical Parameters on the Accuracy of Electronic Apex Locators in CShaped Canals: A Novel Micro-CT Analysis Incorporating Feret Diameter.

Purpose: This study aimed to evaluate the influence of anatomical parameters on the accuracy of two electronic apex locators (Raypex 6 and Root ZX II) in C-shaped canal mandibular molars using a novel Microcomputed tomography (Micro-CT) analysis incorporating Feret diameter.

Method: The actual root canal length (RCL) was measured using the visual method. The electronic canal length (ECL), which determined the apical foramen (AF), and the electronic working length (EWL), which determined the apical constriction (AC), were obtained using Raypex 6 and Root ZX II. The root working length (RWL), calculated by subtracting the AC-AF distance from the RCL, served as a reference to evaluate the accuracy of the EWL. Anatomical parameters were derived from Micro-CT scans and included Feret diameters of AC and AF, AC-AF distance, presence/absence of accessory canal, C-shaped type, AF position and AC morphology. Statistical analysis involved Fisher's exact test and multinomial logistic regression.

Results: The study included 42 C-shaped molar teeth and 119 canals. Raypex 6 and Root ZX II determined AF within ±0.5 mm in 97.5% and 96.4% of canals, respectively. A statistically significant difference was found in accuracy between detecting AF and AC (P <0.05). After multinomial logistic regression, multiple AC morphology was the only factor negatively affecting AC accuracy in both EALs.

Conclusion: Raypex 6 and Root ZX II accurately detected AF but were less reliable for AC in C-shaped canal mandibular molars. Reduced AC accuracy was associated with multiple AC morphology, indicating that EALs may detect the first narrow part of the canal apically rather than the narrowest part.

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来源期刊
Journal of endodontics
Journal of endodontics 医学-牙科与口腔外科
CiteScore
8.80
自引率
9.50%
发文量
224
审稿时长
42 days
期刊介绍: The Journal of Endodontics, the official journal of the American Association of Endodontists, publishes scientific articles, case reports and comparison studies evaluating materials and methods of pulp conservation and endodontic treatment. Endodontists and general dentists can learn about new concepts in root canal treatment and the latest advances in techniques and instrumentation in the one journal that helps them keep pace with rapid changes in this field.
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