初始根管治疗对非手术再治疗的管内穿透性和粘接强度的影响：体外研究。

IF 3.5 2区医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE

Journal of endodontics Pub Date : 2024-10-01 DOI:10.1016/j.joen.2024.07.010

Gabriela Gavilán Hadid DDS, MS , Miguel Angel Ventura DDS, MS , Iago Ramirez MS , Helena Cristina de Assis DDS, MS , Rafael Verardino de Camargo DDS, MS , Manoel Damião de Sousa-Neto DDS, MS, PhD , Jardel Francisco Mazzi-Chaves DDS, MS, PhD , Fabiane Carneiro Lopes-Olhê DDS, MS, PhD

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引用次数: 0

摘要

目的：评估初次牙髓治疗和牙髓再治疗中使用的两种不同牙髓封闭剂的组合对二次封闭的粘接强度和封闭剂的渗透性的影响：方法： 48颗下颌前磨牙接受了标准化的根管治疗和生物力学准备。24颗牙齿接受了AH Plus封闭剂（AHP）的初次封闭，其他牙齿接受了Bio-C®封闭剂（BCS）的封闭。再治疗方案使用 R50 仪器进行。根据主要/次要闭塞封闭剂的组合，样本被进一步细分为四组（n=12）：AHP/AHP；AHP/BCS；BCS/AHP；BCS/BCS。每个分组的四个样本都在封闭剂中添加了荧光团，以便使用激光扫描共聚焦荧光显微镜（LSCFM）进行渗透性分析。8 个推出样本的牙根部分被切成 6 片 1.0 毫米的切片。使用万能试验机对粘结强度（BS）进行评估，直至填充物发生位移。在体视显微镜（20 倍放大率）下对破坏形态进行评估。BS 数据采用双向方差分析，然后进行 Tukey 检验（pResults）：AHP/AHP 组（4.54±1.5 MPa）和 BCS/AHP 组（5.00±1.0 MPa）的 BS 值最高（p结论：与 BCS 密封剂相比，AHP 密封剂具有更高的 BS 值和更强的渗透性。

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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Influence of Initial Root Canal Treatment on Intratubular Penetrability and Bond Strength of Nonsurgical Retreatment: An In Vitro Study

Introduction

To assess the effect of combinations of two different endodontic sealers used in initial and endodontic retreatment on the bond strength of the secondary obturation and the penetrability of the sealers.

Methods

Forty-eight mandibular premolars were used, receiving standardized endodontic access and biomechanical preparation. Twenty-four teeth received AH Plus sealer (AHP) in primary obturation and the others received Bio-C Sealer (BCS). Retreatment protocol was performed with an R50 instrument. The samples were further subdivided into four groups (n = 12) based on the combination of primary/secondary obturation sealers: AHP/AHP; AHP/BCS; BCS/AHP; and BCS/BCS. Four samples from each subgroup received the addition of fluorophores to the sealer for penetrability analysis using laser scanning confocal fluorescence microscopy. The root portion on the 8 push-out samples was sectioned into 6 slices of 1.0 mm. Bond strength (BS) was assessed using a universal testing machine until displacement of the filling mass. Failure pattern was evaluated under a stereomicroscope (20× magnification). BS data were analyzed using two-way analysis of variance followed by Tukey's test (P < .05), and the association between the failure pattern and BS value was assessed using the chi-square test (P < .05). Penetrability was qualitatively evaluated.

Results

The highest BS values were observed in the AHP/AHP (4.54 ± 1.5 MPa) and BCS/AHP (5.00 ± 1.0 MPa) groups (P < .05), with a higher percentage of adhesive failures to the filling material for all groups. Laser scanning confocal fluorescence microscopy images indicated greater penetrability of AHP compared to BCS, both in initial treatment and retreatment.

Conclusion

AHP sealer exhibited higher BS and greater penetrability compared to BCS sealer.

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来源期刊

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.