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首页> 外文期刊>The Journal of Prosthetic Dentistry >The effect of acidic agents on surface ion leaching and surface characteristics of dental porcelains
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The effect of acidic agents on surface ion leaching and surface characteristics of dental porcelains

机译：酸性试剂对牙科瓷器表面离子浸出和表面特性的影响

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Statement of problem. Acidic food and sour fruits and drinks have been investigated for their destructive effects on enamel. However, their effect on porcelain restorations has not been widely examined. Purpose.The purpose ofthis study was to evaluate the ion leaching of porcelains immersed in acidic agents. Material and methods. Fifty-five discs (12.0 mm in diameter and 2.0 mm in thickness) were made from each of 4 types of porcelain (VITA VMK 95, Vitadur Alpha, IPS Empress Esthetic, and IPS e.max Ceram). Baseline data of elemental compositions of all storage agents were recorded. Four groups of discs (n=10) were then immersed in acidic agents (citrate buffer solution, pineapple juice, and green mango juice) and deionized water (control) at 37degC for 168 hours. One group was immersed in 4% acetic acid at 80degC for 168 hours. After immersion, fluids from all specimens for each acidic agent were measured for ion leaching with an inductively coupled plasma optical emission spectros-copy. Surface characteristics of specimens were examined using scanning electron microscopy (SEM). Data were analyzed using 3-way repeated ANOVA and Tukey HSD multiple comparisons (a=.05). Results. This study revealed that each type of porcelain had significantly leached the various ions to varying degrees after being immersed in acidic agents (P<.001 for all comparisons). SEM photomicrographs showed surface destruction of all porcelains. Conclusions. Acidic agents used in this study affected elemental dissolution of the 4 types of porcelains evaluated.
机译：问题陈述。研究了酸性食品和酸性水果和饮料对牙釉质的破坏作用。但是，它们对瓷修复体的作用尚未得到广泛研究。目的：本研究的目的是评估浸在酸性试剂中的瓷器的离子浸出。材料与方法。用4种类型的瓷器（VITA VMK 95，Vitadur Alpha，IPS Empress Esthetic和IPS e.max Ceram）分别制成55个圆盘（直径为12.0 mm，厚度为2.0 mm）。记录所有储存剂的元素组成的基线数据。然后将四组圆盘（n = 10）在37℃的酸剂（柠檬酸盐缓冲溶液，菠萝汁和绿色芒果汁）和去离子水（对照）中浸泡168小时。一组在80℃下浸入4％乙酸中168小时。浸没后，使用电感耦合等离子体发射光谱仪测量所有样品中每种酸性试剂的液体中离子浸出的量。使用扫描电子显微镜（SEM）检查样品的表面特性。使用三向重复方差分析和Tukey HSD多重比较分析数据（a = .05）。结果。这项研究表明，每种类型的瓷器浸入酸性剂中后，都会明显不同程度地浸出各种离子（所有比较的P <.001）。 SEM显微照片显示所有瓷器的表面破坏。结论。本研究中使用的酸性试剂影响了所评估的4种类型瓷器的元素溶解。

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