IMMEDIATE SHADE VERIFICATION SYSTEM FOR CERAMIC RESTORATIONS

为单个前牙陶瓷实现精确的颜色匹配 修复是固定网络中最具挑战性的任务之一 修复学。在文献中已经描述了许多方法 以促进这一进程。最有希望的解决方案是利用 一种具有特定折射率(1.49)的有机液体粘合剂 至1.51)，与牙科瓷器相匹配。当与 不染色预烧牙科瓷器，粘结剂允许立即， 直接直观地显示烧结瓷的颜色。更多 而不是自定义遮阳板，这项技术为实验室提供了 陶艺家与颜色，位置和精确的信息 产生验证的所有瓷器层的厚度， 理想的审美效果。缺点是有机液体 粘结剂-瓷粉混合物保持液态， 使运输变得困难。在我们的方法中，混合了可见的 具有适当折射率的光固化(VLC)聚合物正在被 被认为是有机食品的可能替代品或添加剂 活页夹。 早期的结果，只使用了聚合物，如双酚缩水甘油 甲基丙烯酸酯、氨基甲酸二甲基丙烯酸酯和三甘醇- 去甲基丙烯酸酯，证明了瓷器的摩尔体积 聚合物-陶瓷混合物中的粉末是至关重要的。5%的差异 会导致显著的光学差异。这将呈现 技术不切实际，因为人们需要精确地 测量每个牙科瓷器系统的尺寸。一些人 像Vita Omega这样的瓷器系统有70多种粉末。 此外，所需的摩尔体积经常过度产生 操作特性差的粘性混合物。我最近的经历 研究表明，粉末摩尔体积在VLC时不那么关键 使用聚合物-有机粘结剂混合物。然而，颜色稳定性 是有问题的，因为可能会发生化学降解 聚合物由有机成分组成。化学相容的聚合物- 有机液体组合正在被考虑为适当的 光学特性。后烧结陶瓷的遮阳片已经被 制作成与聚合物-有机液体-粉末进行比较 混合物。 关键词：折射率、牙科瓷器、聚合物、颜色

To achieve an exact color match for a single anterior ceramic restoration is one of the most challenging tasks in fixed prosthodontics. Many methods have been described in the literature to facilitate this process. The most promising solution utilizes an organic liquid binder with a specific index of refraction(1.49 to 1.51) which matches that of dental porcelain. When mixed with un-dyed pre-sintered dental porcelain, the binder allows immediate, direct visualization of the post-sintered porcelain color. More than a custom shade-tab, this technique provides the laboratory ceramist with precise information on the color, location, and thickness of all the porcelain layers that produced the verifies, desirable esthetic effects. A drawback is that the organic liquid binder-porcelain powder mixture remains in a liquid state, which makes transport difficult. In our approach, a mixture of visible light-cured(VLC) polymers with the proper refractive index is being considered as possible replacement or addition to the organic binder. Earlier results, using only polymers such as bisphenol-glycidyl methacrylate, urethane dimethacrylate, and triethylene glycol- demethacrylate, demonstrated that the molar volume of porcelain powder in the polymer-ceramic mixture is critical. A 5% variation can result in significant optical differences. This renders the technique unpractical because one would need to make precise measurements for each of the dental porcelain systems. Some porcelain systems, such as the Vita Omega, have over 70 powders. Furthermore, the required molar volume often produced excessively viscous mixtures with poor handling characteristics. My recent work suggests that powder molar volume is less critical when a VLC polymer-organic binder mixture is used. However, color stability is questionable due to possible chemical degradation of the polymers by the organic components. Chemically compatible polymer- organic liquid combinations are being considered for the proper optical properties. Shade tabs of post-sintered ceramics have been fabricated for comparison with the polymer-organic liquid-powder mixtures. Keywords: refractive index, dental porcelains, polymers, color