Biomechanics of Dental Restorations

牙齿修复的生物力学

• 批准号: 6626270
• 负责人: LAURA A DARNELL
• 金额: $ 4.8万
• 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/6626270
• 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：（由申请人提供）虽然已经与牙釉质可靠粘合 实现，从业人员仍然缺乏强大和持久的债券，以承重 牙本质表面虽然许多因素影响长期强度， 这些债券的耐久性，这项调查建议研究的问题 从机械和结构的角度来看。第一个假设是 研究表明，在粘接接头中， 当牙齿被加载时，在界面处导致应力集中 外部的这反过来又降低了粘附性。第二个假设是， 在复合材料、界面和界面中产生的残余应力， 在修复体形成期间的牙本质也会降低粘附性。这两 将使用一系列纳米压痕来研究所提出的效应 实验、残余应力测量和粘附力测试。