Dental Composite with Reduced Polymerization Stress

聚合应力降低的牙科复合材料

• 批准号: 6338183
• 负责人: John R Condon
• 金额: $ 9.44万
• 依托单位: PROTO-TECH
• 依托单位国家: 美国
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-04-01 至 2001-09-30
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/6338183
• 关键词: biomaterial development /preparation; biomaterial evaluation; composite resins; dental materials; infrared spectrometry; interferometry; oral facial restoration; oral facial restoration material; photoactivation; polymerization; polymers; propylene glycols

DESCRIPTION: Dental composite restorative materials undergo shrinkage during their placement. When they are light-cured in a confined setting, this shrinkage generates stress at the bonded adhesive interfaces with the surrounding tooth structure. Often this stress is sufficient to break the adhesive interface, causing a gap, which leads to marginal staining, sensitivity and recurrent decay. This project will explore an alternative photoinitiator, which can significantly reduce shrinkage stress. The new compound will be custom synthesized and its light-curing capacity will be demonstrated in a model composite. The polymerization stress of the model composite will be measured and compared with a composite containing typical photo-initiator. FTIR analysis will be performed to demonstrate that the novel photo-initiator. PROPOSED COMMERCIAL APPLICATION: The market for dental resoratives is large and highly competitive. Polymerization stress is the leading drawback of this class of materials. An additive such as the one proposed which alleviates this problem without otherwise altering the nature and application of the product would be readily embraced by dental products suppliers worldwide.

描述：牙科复合修复材料在使用过程中会发生收缩。 他们的位置。当它们在封闭的环境中光固化时， 收缩在粘合的粘合剂界面处产生应力， 周围的牙齿结构。通常这种压力足以打破 粘合界面，造成间隙，导致边缘染色， 敏感性和复发性衰退。本项目将探索一种替代方案 光引发剂，其可显著降低收缩应力。新 化合物将定制合成，其光固化能力将是 在一个模型复合中展示。模型的聚合应力 将测量复合材料并与含有典型的 光引发剂。将进行FTIR分析以证明新的 光引发剂。 拟定商业应用： 牙齿吸收剂市场很大，竞争激烈。 聚合应力是 这类材料的主要缺点。 一种添加剂，例如 其在不改变本发明的性质和应用的情况下解决了该问题， 产品将很容易被全球牙科产品供应商所接受。