Division of Crown and Bridge, Department of Conservative Dentistry, Faculty of Dentistry, Prince of Songkla University, Songkhla, Thailand.
J Prosthet Dent. 2010 Mar;103(3):148-62. doi: 10.1016/S0022-3913(10)60021-2.
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.
The purpose of this study was to evaluate the ion leaching of porcelains immersed in acidic agents.
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 37 degrees C for 168 hours. One group was immersed in 4% acetic acid at 80 degrees C 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 spectroscopy. Surface characteristics of specimens were examined using scanning electron microscopy (SEM). Data were analyzed using 3-way repeated ANOVA and Tukey HSD multiple comparisons (alpha=.05).
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.
Acidic agents used in this study affected elemental dissolution of the 4 types of porcelains evaluated.
酸性食物和酸水果及饮料已被研究其对牙釉质的破坏作用。然而，它们对瓷修复体的影响尚未得到广泛研究。
本研究旨在评估浸泡在酸性剂中的瓷的离子浸出。
从 4 种瓷(VITA VMK95、VitaDur Alpha、IPS Empress Esthetic 和 IPS e.max Ceram)中各制作 55 个直径为 12.0mm、厚度为 2.0mm 的圆盘。记录所有储存剂的元素组成的基线数据。然后将 4 组圆盘(n=10)分别浸泡在酸性剂(柠檬酸盐缓冲溶液、菠萝汁和青芒果汁)和去离子水中(对照)中 37°C 168 小时。一组在 80°C 下浸泡在 4%的乙酸中 168 小时。浸泡后，用电感耦合等离子体发射光谱法测量所有酸性剂中每个样本的浸出液中的离子浸出量。用扫描电子显微镜(SEM)检查样本的表面特性。使用三因素重复方差分析和 Tukey HSD 多重比较(α=.05)分析数据。
本研究表明，每种瓷在浸泡在酸性剂后，不同程度地浸出了各种离子(P<.001，所有比较)。SEM 照片显示所有瓷都有表面破坏。
本研究中使用的酸性剂影响了所评估的 4 种瓷的元素溶解。
