SOL-GEL DERIVED CONTINUOUS DUAL MATRIX COMPOSITES

天然牙釉质可归类为颗粒状复合体 材料科学术语。牙釉质是一种高度填充的复合材料。 由体积百分比大于80%的矿物组成 羟基磷灰石和组织精细的显微结构。这些独特的 特性对牙釉质的能力有很大影响 能承受口腔环境的相对恶劣条件。在……里面 近年来，临床研究表明，目前的改善 从性能方面看，牙科复合材料的性能已达到 很大程度上通过减小填料颗粒的尺寸和增加 树脂基质中填充物的百分比。似乎有理由认为 如果这种微观结构趋势，可能会经历进一步的改善 还在继续。溶胶-凝胶技术提供了一些独特的理论潜力 在这方面，应该加以审查。 在计算机领域正在进行的研究和开发努力 辅助设计和制造(CAD/CAM)和粘接技术 其中一些非常有可能成为革命性的新型修复牙科 送货。从材料的角度来看，这项技术使研究人员 寻求材料加工的新途径。最大限度地利用 在临床上，这种技术只有在与材料相结合时才能实现。 非常适合这项任务。微结构最小的材料 受研磨过程不利影响将是最理想的。AS 临床医生我们已经采用了一种高速铣削天然牙的工艺 已经有50多年的时间了，以修复牙齿的形式。这个 磨牙工艺在天然牙上的应用效果良好 临床上的成功，并不被认为是主要的贡献 恢复性失败。天然牙齿本身似乎是 由可碾磨或可加工的材料或组织制成的 大自然可以为材料设计师提供一种更好的模型 研究人员。更接近于模拟超细颗粒的材料 天然牙釉质和牙本质的显微结构特征 已评估。溶胶-凝胶法制备的样品的微观结构特征 复合材料在这方面很有兴趣。 对美容修复的需求对实践产生了重大影响 修复性牙科。因此，未来材料的成功 无疑会受到它们的光学特性的影响。发展中 有可能更接近地模拟光学 必须充分考虑天然牙齿的特点。这个 溶胶-凝胶的超细微结构和组成柔性 工艺为新材料的设计提供了巨大的潜力， 光学特性的控制。 总而言之，似乎有大量证据表明 连续双基复合材料的溶胶-凝胶法 材料可能有一些潜力作为开发新牙科的途径 材料，应谨慎追查。

Natural tooth enamel dentine can be classified as particulate composites in materials science terminology. Enamel is a highly filled composite consisting of greater than 80 volume percent mineral in the form of hydroxyapatite and a finely organized microstructure. These unique characteristics contribute significantly to the enamels ability to withstand the relatively harsh conditions of the oral environment. In recent years, clinical studies have suggested that the current improvements seen in performance properties of dental composites have come about to a great extent by decreasing the size of the filler particles and increasing the percent filler in the resin matrix. It would seem reasonable to think that further improvements may be experienced if this microstructural trend continues. The sol-gel technology offers some unique theoretical potential in this regard and should be examined. The research and development efforts being made in the area of computer aided design and manufacturing (CAD/CAM) and adhesion technology presents some a very real possibility for revolutionary new restorative dental delivery. From a materials perspective, this technology allows researchers to pursue new avenues of materials processing. The maximum utilization of this technology clinically can only come about when combined with materials ideally suited to the task. Materials whose microstructures are minimally adversely affected by the milling process will be most ideal. As clinicians we have employed a high speed milling processes to natural teeth for well over 50 years in the form of restorative tooth preparation. The application of the milling process to natural teeth has enjoyed good clinical success and is not perceived to be a major contributor to restorative failures. Natural teeth themselves would appear to be constructed of materials or tissues which are millable or machinable by nature an may provide one of the better models to materials designers and researchers. Materials which more closely simulate the ultra-fine microstructural features of natural tooth enamel and dentin should be evaluated. The microstructural characteristics of sol-gel derived composite materials are of interest in this regard. The demand for esthetic restorations has had a major impact on the practice of restorative dentistry. As a result, the success of future materials will no doubt be influence by their optical characteristics. Developing materials which have the potential to more closely simulate the optical characteristics of natural teeth must be given strong consideration. The ultra-fine microstructural and compositional flexibility of the sol-gel process allows great potential for the design of new materials with precise control of optical properties. In summary, it appears that there is substantial evidence to suggest that the sol-gel derived method of processing continuous dual matrix composite materials may have some potential as a route to develop new dental materials and should be carefully pursued.