STANDARDS FOR IMPROVING DENTAL INSTRUMENTS AND MATERIALS

仪器、材料标准、规范的制定 需要开发和评估标准测试方法 可以在不同的实验室中可靠地使用。 标准试验 方法和测试设备最终导致以下方面的改进 牙科材料和仪器的特性通常通过 修改现有产品或开发新产品 尝试满足各种最低验收标准 规范. 这项建议的目的是：1）改善牙科 材料和仪器的开发和评估的测试方法，2） 设计或修改测试模具、夹具和仪器， 用于评价牙科器械和材料，以及3）评价 牙科器械的物理、机械和化学性能， 可用于设定最低质量限值的设备和材料 在国内和国际规格。 此更新请求包括 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 粘结包埋料、丝网-薄膜组合、义齿基托树脂和 冠桥合金的腐蚀。

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.