Dental Restoration Failure Analysis

描述（由申请人提供）：牙科材料的技术进步和牙科老年人口的快速增长对数量和质量的需求增加相结合，导致以前所未有的速度生产新的牙科修复系统。长寿研究已经跟不上市场驱动的需求。这使得测试技术和故障分析变得越来越重要。该项目的目标是通过了解牙科修复失败模式来满足牙科专业人员的需求，制定提高牙科修复寿命的指南和建议，并传播相关信息。这些目标将通过一系列步骤实现。首先，将建立基于应用的相关性能测试技术，而不是基于材料的。这将有助于解决牙科领域目前的一些问题，许多不同的材料现在非常先进，可以用于相同的应用，但仍然需要进行不同的测试。其次，将制备测试材料的膨胀形样本，并将其断裂以模拟体内膨胀失效的断裂面。再现断裂表面的能力代表了对应力配置和断裂进展的透彻理解。直到最近，断口分析研究和一小部分失败的解释才使这种奋进成为可能。接下来，该项目将继续利用新建立的PBRN建立失败的故障排除库。通过收集统计学上显著数量的骨折，与已发表的长寿研究的相关性最终成为可能。最后一个目标是有效的技术转让，因为这项研究具有直接的实用价值和科学价值。除了演讲和出版物外，还将为牙科学校提供一个教育包，并通过PBRN计划和ADA的资源向执业专业提供信息。该项目将通过提高牙科清洁剂的质量和耐用性而使公众受益。为了避免修复失败，必须了解性能、测试和断裂进展的作用。这对研究人员来说具有明显的价值，但这些知识和数据也将为执业牙医，制造商和实验室技术人员提供，以便能够共同努力，在自己的专业领域内做出明智的选择。

DESCRIPTION (provided by applicant): The combination of technological advances in Dental materials and increased demands in quantity and quality by a burgeoning population of dentate elderly has resulted in the production of new Dental restoration systems at an unprecedented pace. Longevity studies can no longer keep up with market-driven demands. This has placed increased importance on testing techniques and failure analyses. The goal of this project is to meet the needs of Dental professionals by understanding Dental restoration failure modes, produce guidelines and recommendations for improving Dental restoration longevity and disseminate the relevant information. The goals will be achieved in a series of steps. First, relevant application-based property testing techniques will be established, rather than material-based. This will help solve some of the current problems in the Dental field, where many different materials are now so advanced they can be used for the same application, but are still tested differently. Second, restoration-shaped specimens of the tested materials will be made and broken to mimic the fracture surfaces of failed restorations in vivo. The ability to reproduce a fracture surface represents a thorough understanding of the stress configuration and fracture progression. Only very recently have fractographic studies and a small collection of failed restorations enabled such an endeavor. Next, this project will continue to build a library of failed restorations, utilizing the newly established PBRNs. By collecting a statistically significant number of fractures, correlations with published longevity studies would finally be possible. The last goal is effective technology transfer, as this research has immediate practical value and scientific merit. Besides presentations and publications, an educational package will be made available for Dental schools, and information will be made available to practicing professions through the PBRN program and the resources of the ADA. This project will benefit the public by improving the quality and durability of Dental restorations. In order to avoid restoration failure, the role of properties, testing and fracture progression must be understood. This is of obvious value to researchers, but this knowledge and data will also be accessible for practicing Dentists, manufacturers and laboratory technicians to be able to work together to make informed choices regarding restorations within their own areas of expertise.