Fatigue testing of biomaterials and their interfaces
Fatigue testing of biomaterials and their interfaces
复制标题
DOI：
10.1016/j.dental.2017.01.012
复制
发表时间：
2017-04-01
期刊：
影响因子：
5
通讯作者：
Arola, Dwayne
中科院分区：
文献类型：
--
作者：
Arola, Dwayne
Objective.这篇文章的目的是描述疲劳的重要性，成功的修复牙科，重点是在这一领域的材料的疲劳性能的评估方法，和他们的粘接界面的耐久性。介绍了应力-寿命疲劳和疲劳裂纹扩展两种评价牙科生物材料抗疲劳性能的方法。重点放在硬组织基础，修复材料及其粘结界面的体外研究。然后讨论耐久性的概念，包括传统的“机械”疲劳与口腔环境的普遍威胁相结合的影响，包括pH值的变化和内源性牙本质蛋白酶的激活。有越来越多的证据表明，疲劳是导致疲劳失效的主要因素，并且用于鉴定新材料和实践的静强度测量不能反映疲劳性能。选定的研究结果表明，在放置牙槽骨的基本步骤，包括切割的准备和蚀刻，导致硬组织基础的疲劳强度显着降低。关于粘结界面，研究结果集中在抗疲劳性突出的重要性，杂交的树脂标签，减少完整性的牙本质胶原是有害的耐久性的牙本质bonds. Significance。疲劳应该是开发新牙科材料和评估修复实践成功与否的核心问题。更多地认识到疲劳对修复失败的贡献，以及与体内条件更紧密联系的方法的发展，对于扩展终身口腔健康的定义至关重要。(C)2017年牙科材料学院。由爱思唯尔有限公司出版。保留所有权利。
Objective. The objective of this article is to describe the importance of fatigue to the success of restorative dentistry, with emphasis on the methods for evaluating the fatigue properties of materials in this field, and the durability of their bonded interfaces.Methods. The stress-life fatigue and fatigue crack growth approaches for evaluating the fatigue resistance of dental biomaterials are introduced. Emphasis is placed on in vitro studies of the hard tissue foundation, restorative materials and their bonded interfaces. The concept of durability is then discussed, including the effects of conventional "mechanical" fatigue combined with pervasive threats of the oral environment, including variations in pH and the activation of endogenous dentin proteases.Results. There is growing evidence that fatigue is a principal contributor to the failure of restorations and that measures of static strength, used in qualifying new materials and practices, are not reflective of the fatigue performance. Results of selected studies show that the fundamental steps involved in the placement of restorations, including the cutting of preparations and etching, cause a significant reduction to the fatigue strength of the hard tissue foundation. In regards to the bonded interface, results of studies focused on fatigue resistance highlight the importance of the hybridization of resin tags, and that a reduction in integrity of the dentin collagen is detrimental to the durability of dentin bonds.Significance. Fatigue should be a central concern in the development of new dental materials and in assessing the success of restorative practices. A greater recognition of contributions from fatigue to restoration failures, and the development of approaches with closer connection to in vivo conditions, will be essential for extending the definition of lifelong oral health. (C) 2017 The Academy of Dental Materials. Published by Elsevier Ltd. All rights reserved.