Biomechanics of Dental Restorations

牙齿修复的生物力学

• 批准号: 6892831
• 负责人: LAURA A DARNELL
• 金额: $ 4.88万
• 依托单位: UNIVERSITY OF PENNSYLVANIA
• 依托单位国家: 美国
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-08-14 至 2007-05-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/6892831
• 关键词: adhesions; bioengineering /biomedical engineering; biomaterial interface interaction; biomechanics; chemical structure function; composite resins; dental adhesive /sealant; dental disorder; dental material wear; dentin; elasticity; electron microscopy; human tissue; intermolecular interaction; mechanical stress; morphometry; predoctoral investigator; statistics /biometry

DESCRIPTION: (provided by applicant) While reliable bonding to enamel has been achieved, practitioners still lack strong and durable bonds to load-bearing dentin surfaces. While many factors affect the long-term strength and durability of these bonds, this investigation proposes to study the problem from a mechanical and structural perspective. The first hypothesis for the study is that the sharp gradients in elastic properties in an adhesive joint lead to stress concentrations at the interface when the tooth is loaded externally. This in turn degrades adhesion. The second hypothesis is that the residual stresses that are generated in the composite, the interface, and the dentin during formation of the restoration also degrade adhesion. These two proposed effects will be investigated using a series of nanoindentation experiments, residual stress measurements, and adhesion testing.

描述：(申请人提供)虽然牙釉质与牙釉质有可靠的粘结 虽然实现了这一点，但从业者仍然缺乏牢固和持久的承重纽带 牙本质表面。虽然许多因素影响着长期的实力和 这些债券的持久性，这项调查建议研究这一问题 从机械和结构的角度来看。第一个假设是关于 研究表明，粘接接头中弹性性能的急剧梯度 导致牙齿加载时界面处的应力集中 从外部来说。这反过来又会降低粘附性。第二个假设是 在复合材料、界面和界面中产生的残余应力 牙本质在修复体形成过程中也会降低粘附力。这两个 所提出的效应将使用一系列纳米压痕进行研究 实验、残余应力测量和附着力测试。