Surface strain at the cervical area and fracture strength of flared root canals reinforced using a zirconia tube and glass-fiber post

IF 3.4 3区 医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE
Daiki Kondo, Wataru Komada, Shinya Oishi, Kenji Fueki
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Abstract

Background/purpose

Recently, an effective core build-up system for teeth with flared root canals is needed. This research aimed to evaluate the effect of foundation restorations using a composite resin core with a fiber post reinforced with a zirconia tube for the surface strain at the cervical area and the fracture load of teeth with flared root canals.

Materials and methods

Bovine teeth were shaped to mimic human premolars with flared root canals and restored using three types of composite resin foundation restorations with each materials described below: a fiber post (FC), a zirconia tube (ZC), a fiber post and zirconia tube (ZFC). Each specimen was restored with a zirconia crown. The surface strains of the specimens at the cervical area and fracture loads were analyzed using a one-way analysis of variance (ANOVA), followed by Tukey's honest significant difference test.

Results

The surface strains of Groups ZFC and ZC were significantly lower than that of Group FC in the buccal root. The fracture strengths of Groups ZFC and ZC were significantly higher than that of Group FC. The strength of Group ZFC was significantly higher than that of Group ZC.

Conclusion

The use of a composite resin core with a zirconia tube for the simulated premolar with flared root canals reduced surface strain at the cervical area and provided higher fracture strength compared to using a composite resin core with a fiber post. And the zirconia tubes provided even higher fracture strength when used with a fiber post.

使用氧化锆管和玻璃纤维桩加固的扩口根管颈部表面应变和折断强度
背景/目的近来,需要一种有效的根管外翻牙齿的核心建立系统。本研究旨在评估使用带有纤维桩和氧化锆管增强的复合树脂核心的基础修复体对根管外翻的牙齿的颈部表面应变和折断负荷的影响。材料和方法模拟带有根管外翻的人类前磨牙,使用三种类型的复合树脂基础修复体进行修复,每种材料如下所述:纤维桩(FC)、氧化锆管(ZC)、纤维桩和氧化锆管(ZFC)。每个试样都用氧化锆冠修复。采用单因素方差分析(ANOVA)对试样颈部的表面应变和断裂载荷进行分析,然后进行 Tukey's 诚实显著性差异检验。结果 ZFC 和 ZC 组在颊根部的表面应变明显低于 FC 组。ZFC 和 ZC 组的断裂强度明显高于 FC 组。结论与使用带有纤维桩的复合树脂牙核相比,使用带有氧化锆管的复合树脂牙核来治疗根管外翻的模拟前磨牙可以减少牙颈部的表面应变,并提供更高的折断强度。而氧化锆管与纤维桩一起使用时,断裂强度更高。
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 Dental Sciences
Journal of Dental Sciences 医学-牙科与口腔外科
CiteScore
5.10
自引率
14.30%
发文量
348
审稿时长
6 days
期刊介绍: he Journal of Dental Sciences (JDS), published quarterly, is the official and open access publication of the Association for Dental Sciences of the Republic of China (ADS-ROC). The precedent journal of the JDS is the Chinese Dental Journal (CDJ) which had already been covered by MEDLINE in 1988. As the CDJ continued to prove its importance in the region, the ADS-ROC decided to move to the international community by publishing an English journal. Hence, the birth of the JDS in 2006. The JDS is indexed in the SCI Expanded since 2008. It is also indexed in Scopus, and EMCare, ScienceDirect, SIIC Data Bases. The topics covered by the JDS include all fields of basic and clinical dentistry. Some manuscripts focusing on the study of certain endemic diseases such as dental caries and periodontal diseases in particular regions of any country as well as oral pre-cancers, oral cancers, and oral submucous fibrosis related to betel nut chewing habit are also considered for publication. Besides, the JDS also publishes articles about the efficacy of a new treatment modality on oral verrucous hyperplasia or early oral squamous cell carcinoma.
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