Karami Zarandi Parisa, Madani Azamsadat, Bagheri Hosein, Moslemion Maryam
Dept. of Prosthodontics, Faculty of Dentistry, Zanjan University of Medical Science, Zanjan, Iran.
Dental Material Research Center, Mashhad University of Medical Science, Mashhad, Iran.
J Dent (Shiraz). 2020 Mar;21(1):63-68. doi: 10.30476/DENTJODS.2019.77789.0.
Despite yttria-stabilized tetragonal zirconia polycrystal (Y-TZP) high strength in dental restoration application, Zr- the framework has a low tendency to react chemically with cement which is the main reason of these restoration failures.
The aim of this in vitro study was to evaluate the effect of Y-TZP coating by nanocomposite of silica and aluminosilicate according to the sol-gel dip-coating technique on the bond strength of resin cement to Y-TZP.
In this experimental study, Y-TZP blocks (10×10×3mm) were prepared and sintered and assigned into 4 groups (n=10) for coating including control group without any further surface treatment, sandblasted using 110μm alumina particles under 2.5 bar and tip distance of 10 mm, silica sol dip coating+calcination, aluminosilicate sol dip coating+ calcinations. To confirm chemical bonds of sol-gel covers, Fourier transforms infrared spectroscopy (FT-IR) technique was used. The surface of the sample was investigated by scanning electron microscopy (SEM), energy-dispersive spectroscopy detector (EDS) and x-ray diffraction (XRD) methods. Micro-shear bond strengths (µSBS) of zirconia-cement specimens were evaluated. Data were analyzed with a one-way ANOVA test in SPSS version 11.5 software with a confidence interval of 95%.
µSBS of sandblasting, nano-silica, and nano-aluminosilicate specimens were significantly higher than control. µSBS of nano-silica was higher than other groups but no significant difference was observed in µSBS of sandblasting nano-silica, and nano-aluminosilicate groups (> 0.05).
Covering the zirconia surface with non-invasive nano-silica and nano-aluminosilicate using the sol-gel technique leads to improved cement bond strength.
尽管氧化钇稳定四方多晶氧化锆（Y-TZP）在牙科修复应用中具有高强度，但锆框架与粘结剂发生化学反应的倾向较低，这是这些修复失败的主要原因。
本体外研究的目的是根据溶胶-凝胶浸涂技术，评估二氧化硅和硅铝酸盐纳米复合材料对Y-TZP进行涂层处理对树脂粘结剂与Y-TZP之间粘结强度的影响。
在本实验研究中，制备并烧结Y-TZP块（10×10×3mm），并分为4组（n = 10）进行涂层处理，包括未进行任何进一步表面处理的对照组、在2.5巴压力和10毫米尖端距离下使用110μm氧化铝颗粒进行喷砂处理的组、二氧化硅溶胶浸涂+煅烧组、硅铝酸盐溶胶浸涂+煅烧组。为了确认溶胶-凝胶涂层的化学键，使用了傅里叶变换红外光谱（FT-IR）技术。通过扫描电子显微镜（SEM）、能量色散光谱探测器（EDS）和X射线衍射（XRD）方法对样品表面进行研究。评估氧化锆-粘结剂试样的微剪切粘结强度（µSBS）。使用SPSS 11.5软件中的单向方差分析测试对数据进行分析，置信区间为95%。
喷砂处理、纳米二氧化硅和纳米硅铝酸盐试样的µSBS显著高于对照组。纳米二氧化硅的µSBS高于其他组，但喷砂处理、纳米二氧化硅和纳米硅铝酸盐组的µSBS之间未观察到显著差异（>0.05）。
使用溶胶-凝胶技术用无创纳米二氧化硅和纳米硅铝酸盐覆盖氧化锆表面可提高粘结剂粘结强度。
