Four-point flexural strength and microtensile bond strength of digitally and conventionally veneered zirconia

IF 1.8 4区 医学 Q2 DENTISTRY, ORAL SURGERY & MEDICINE
M. Utar, Z. Demirtağ
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Abstract

This study intended to evaluate the effect of digital veneering on four-point flexural strength (FS) and microtensile bond strength (μTBS) of veneered zirconia. Two different zirconia blocks, a lithium disilicate and a feldspathic ceramic block, and two different layering ceramics were used. IPS e.max Zir CAD (ZC) and Vita In-Ceram YZ (YZ) with yttria stabilized tetragonal zirconia polycrystals (3Y-TZP) were used as substructures. IPS e.max CAD (LD), Vita Mark II (VMII), IPS e.max Ceram (EC) and Vita VM9 (VM9) were used for veneering. Resin cement and fusion ceramic were placed between veneer and zirconia substructure for digital veneering. A total of one hundred and fifty specimens in five groups (n = 30) were prepared for FS and tested in universal machine at 1.0 mm/min. One hundred specimens in five groups (n = 20) were obtained for the μTBS and tested at 1.0 mm/min. Statistical analysis was made by one way ANOVA and Tukey HSD. Conventional veneering showed statistically significant FS. ZC veneered with EC had the highest mean FS and the lowest was obtained in groups veneered through resin cement. YZ layered with VM9 had the highest mean μTBS. ZC veneered through fusion ceramic and YZ veneered through resin cement showed significantly lower and similar μTBS.

四点弯曲强度和微拉伸结合强度的数字和传统贴面氧化锆
本研究旨在评估数字贴面对贴面氧化锆四点抗折强度(FS)和微拉伸键合强度(μTBS)的影响。使用了两种不同的氧化锆块,一种是二硅酸锂,一种是长石陶瓷块,以及两种不同的分层陶瓷。以IPS e.max Zir CAD (ZC)和Vita In-Ceram YZ (YZ)为亚结构,并以钇稳定的四边形氧化锆多晶(3Y-TZP)为亚结构。贴面采用IPS e.max CAD (LD)、Vita Mark II (VMII)、IPS e.max Ceram (EC)和Vita VM9 (VM9)。树脂水泥和熔融陶瓷被放置在单板和氧化锆基材之间,用于数字贴面。制备5组共150个标本(n = 30),在万能机上以1.0 mm/min的速度进行FS测试。取5组标本100只(n = 20),以1.0 mm/min的速度测定μTBS。采用单因素方差分析和Tukey HSD进行统计分析。常规贴面的FS有统计学意义。EC贴面的ZC组平均FS最高,树脂水泥贴面的ZC组平均FS最低。VM9层合的YZ的平均μTBS最高。通过融合陶瓷贴面的ZC和通过树脂水泥贴面的YZ的μTBS明显较低且相似。
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来源期刊
European Journal of Oral Sciences
European Journal of Oral Sciences 医学-牙科与口腔外科
CiteScore
3.50
自引率
5.30%
发文量
61
审稿时长
2 months
期刊介绍: The European Journal of Oral Sciences is an international journal which publishes original research papers within clinical dentistry, on all basic science aspects of structure, chemistry, developmental biology, physiology and pathology of relevant tissues, as well as on microbiology, biomaterials and the behavioural sciences as they relate to dentistry. In general, analytical studies are preferred to descriptive ones. Reviews, Short Communications and Letters to the Editor will also be considered for publication. The journal is published bimonthly.
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