Fatima Nazish, Abidi Syed Yawar Ali, Qazi Fazal-Ur-Rehaman, Jat Shahbaz Ahmed
Department of Operative Dentistry, Dr-Ishrat-Ul-Ebad Khan Institute of Oral Health Sciences, Dow University of Health Science, Karachi, Pakistan.
Saudi Dent J. 2013 Jan;25(1):29-32. doi: 10.1016/j.sdentj.2012.09.002. Epub 2012 Oct 27.
To examine the effect of apple and orange juices on the surface hardness of direct tooth-colored restorative materials.
The materials included resin-modified glass ionomer cement (Vitremer 3M™ ESPE™ Core buildup restorative) and composite resin (Filtek™ 3M™ ESPE™ Z350). A total of 45 disks of each restorative material were prepared. The disks were divided into groups of 15, which were immersed for 7 days in deionized water (G1/G4, control group), apple juice (G2/G5), or orange juice (G3/G6). The pH of the apple juice was approximately 4.8 and the pH of the orange juice was approximately 4.9. Surface hardness tests were performed before immersion and at various times following immersion. Statistical analysis included two-way ANOVA with repeated measurement and Tukey's test.
Exposure to juices significantly reduced the hardness of both materials (p < 0.05), while deionized water did not affect the surface hardness of either material. The ionomer cement experienced a greater reduction than the composite resin (p = 0.000). There was no significant difference in the effect of apple and orange juices.
Juice box-type fruit juices reduced the hardness of direct tooth-colored restorative materials. Material selection should be considered when planning restorations in patients who have experienced tooth surface loss. In terms of the materials evaluated in this study, the composite material provides greater durability under acidic conditions.
研究苹果汁和橙汁对直接牙齿颜色修复材料表面硬度的影响。
材料包括树脂改性玻璃离子水门汀（Vitremer 3M™ ESPE™ 核桩修复材料）和复合树脂（Filtek™ 3M™ ESPE™ Z350）。每种修复材料共制备45个圆盘。圆盘被分成每组15个，分别浸泡在去离子水（G1/G4，对照组）、苹果汁（G2/G5）或橙汁（G3/G6）中7天。苹果汁的pH值约为4.8，橙汁的pH值约为4.9。在浸泡前和浸泡后的不同时间进行表面硬度测试。统计分析包括重复测量的双向方差分析和Tukey检验。
接触果汁显著降低了两种材料的硬度（p < 0.05），而去离子水对两种材料的表面硬度均无影响。离子水门汀的硬度降低幅度大于复合树脂（p = 0.000）。苹果汁和橙汁的影响没有显著差异。
盒装果汁会降低直接牙齿颜色修复材料的硬度。在为牙齿表面有缺损的患者计划修复时应考虑材料的选择。就本研究中评估的材料而言，复合材料在酸性条件下具有更高的耐久性。
