Effect of various preparation designs on pull-out bond strength of endocrown.

Q3 Dentistry
Naveen Thangarasu, K Vijay Venkatesh
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引用次数: 0

Abstract

Background: The endocrown is described as monobloc ceramic component. The pull-out bond strength acts as a real-life scenario of failure that occurs in endocrown. The different preparation designs have been included to assess the type of preparation that resists the least failure.

Aim: To evaluate the effect of three different types of preparation designs on the pull-out bond strength (PBS) of computer-aided design/computer-aided manufacturing (CAD/CAM) monolithic endocrowns.

Methods and materials: Thirty extracted mandibular first molars were used for this study. Root canal treatment was done. Samples were divided into three groups of 10 samples each. Group A consists of traditional endocrown preparation with a butt joint preparation. The group B consists of a modified preparation with 50-60 degree inward slope. The group C consists of preparation with a 50-60 degree outward slope. Endocrowns were fabricated using CAD/CAM lithium disilicate glass-ceramics. The endocrowns were adhesively bonded to the respective preparations. Pull-out bond strength was calculated using the universal testing machine at a crosshead speed of 1 mm/min.

Statistical analysis: The results were statistically evaluated by one-way ANOVA and Tukey's post hoc analysis.

Results: Group B had higher pull-out bond strength compared to the other two types of preparation designs and showed a statistically significant value with a mean significant difference at 0.05 level (P < 0.05).

Conclusion: The 50-60 degree inward bevel in endocrown preparation increased the pull-out bond strength in lithium disilicate endocrowns.

各种制备设计对内冠拉出粘接强度的影响
背景介绍内冠被描述为单体陶瓷组件。拉出粘接强度是内冠失效的真实情况。目的:评估三种不同类型的预备设计对计算机辅助设计/计算机辅助制造(CAD/CAM)单体内冠拉出粘接强度(PBS)的影响:本研究使用了 30 颗拔出的下颌第一磨牙。进行了根管治疗。样本分为三组,每组 10 个样本。A 组包括传统的冠内预备和对接预备。B 组包括向内倾斜 50-60 度的改良预备。C 组包括向外倾斜 50-60 度的制备方法。内冠使用 CAD/CAM 二硅酸锂玻璃陶瓷制作。将内冠粘结到相应的预备体上。使用万能试验机以 1 毫米/分钟的十字头速度计算拉出粘接强度:统计分析:采用单因素方差分析和 Tukey 后分析对结果进行统计评估:结果:与其他两种制备设计相比,B 组的拔出粘接强度更高,且在 0.05 水平上具有显著的统计学差异(P < 0.05):结论:内冠预备中50-60度的向内斜面提高了二硅酸锂内冠的拔出粘接强度。
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
Indian Journal of Dental Research
Indian Journal of Dental Research Dentistry-Dentistry (all)
CiteScore
1.80
自引率
0.00%
发文量
80
审稿时长
38 weeks
期刊介绍: Indian Journal of Dental Research (IJDR) is the official publication of the Indian Society for Dental Research (ISDR), India section of the International Association for Dental Research (IADR), published quarterly. IJDR publishes scientific papers on well designed and controlled original research involving orodental sciences. Papers may also include reports on unusual and interesting case presentations and invited review papers on significant topics.
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