STANDARDS FOR IMPROVING DENTAL INSTRUMENTS AND MATERIALS

制定仪器和材料的标准和规范 在牙科需要开发和评估标准测试方法 可以可靠地在不同的实验室使用。标准测试 方法和测试设备最终导致改进 牙科材料和器械的特性通常通过 现有产品的修改或新产品的开发 尝试满足各种不同的最低验收标准 规格。这项建议的目标是：1)改善牙齿 材料和仪器的开发和测试方法的评估，2) 设计或修改适用于以下产品的测试模具、夹具和仪器 用于评估牙科器械和材料，以及3)评估 牙科器械的物理、机械和化学特性， 可用于设定最低质量限值的设备和材料 在国家和国际规范中。此续订请求包括 以下主要领域：牙髓器械、牙髓测试仪、复合材料 树脂、可见光固化设备、牙本质粘结剂、硅酸盐 保税投资、银幕-电影组合、义齿基托树脂和 牙冠和牙桥合金的腐蚀。

Formulation of standards and specifications for instruments and materials in dentistry requires development and evaluation of standard test methods that can be used in different laboratories with reliability. Standard test methods and test equipment ultimately lead to improvements in characteristics of dental materials and instrumentation usually through modification of existing products or development of new products in attempts to meet the minimum acceptance criteria of various specifications. The objectives of this proposal are: 1) to improve dental materials and instruments by development and evaluation of test methods, 2) to design or modify test dies, fixtures and instrumentation suitable for use in evaluation of dental instruments and materials, and 3) to evaluate physical, mechanical and chemical properties of dental instruments, equipment and materials which can be used in setting minimum quality limits in national and international specifications. This renewal request covers the following major areas: Endodontic instruments, pulp testers, composite resins, visible light curing devices, dentin bonding agents, silicate bonded investments, screen-film combinations, denture base resins and corrosion of crown and bridge alloys.