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首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >Principles of crystal phase formation in Ivoclar Vivadent glass-ceramics for dental restorations
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Principles of crystal phase formation in Ivoclar Vivadent glass-ceramics for dental restorations

机译：用于牙齿修复的Ivoclar Vivadent玻璃陶瓷的晶相形成原理

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This article describes the main principles that are involved in the development of glass-ceramics for restorative dental products. These principles include the controlled nucleation and crystallization of crystal phases in glass-ceramics. The aim of these liquid-to-solid state reactions is to produce glass-ceramics with different crystal phases, such as lithium disilicate, which feature special microstructures and crystal phase contents in order to influence the properties of the resulting material. Two fundamentally different nucleation and crystallization mechanisms have been identified in this respect: firstly, internal nucleation and crystallization by heterogeneous, amorphous or nano-crystalline phases to precipitate, e.g. lithium disilicate (Li2Si2O5) and secondly, surface nucleation and crystallization by means of controlled surface activation to precipitate, e.g. leucite (KAlSi2O6). The authors show methods for developing also glass-ceramics of fluorapatite type (Ca-5(PO4)(3)F) and glass-ceramics with high ZrO2 content. The use of the principles mentioned allows Ivoclar Vivadent AG to develop glass-ceramics with e.g. high mechanical strength, chemical durability and good optical properties, which are suitable for use in restorative dentistry. Metal-free and metal-supported dental restorations such as crowns, inlays, veneers and bridges are presented as examples of typical applications. (C) 2015 Elsevier B.V. All rights reserved.
机译：本文介绍了用于修复性牙科产品的玻璃陶瓷开发所涉及的主要原理。这些原理包括玻璃陶瓷中晶相的受控成核和结晶。这些液-固反应的目的是生产具有不同晶相的玻璃陶瓷，例如二硅酸锂，其具有特殊的微结构和晶相含量，以影响所得材料的性能。在这方面，已经鉴定出两种根本不同的成核和结晶机理：首先，通过非均相，非晶或纳米晶相沉淀，例如结晶，进行内部成核和结晶。二硅酸锂（Li 2 Si 2 O 5），其次，通过受控的表面活化使表面成核和结晶，以沉淀出例如锂。白云石（KAlSi2O6）。作者展示了开发氟代磷灰石类型的玻璃陶瓷（Ca-5（PO4）（3）F）和高ZrO2含量的玻璃陶瓷的方法。所提到的原理的使用使Ivoclar Vivadent AG可以用以下方法开发玻璃陶瓷。高机械强度，化学耐久性和良好的光学性能，适用于修复性牙科。介绍了无金属和金属支撑的牙齿修复体，例如牙冠，嵌体，贴面和牙桥，作为典型应用的示例。 （C）2015 Elsevier B.V.保留所有权利。

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