Standard No.:	YY/T 1646-2019
English Name:	Dentistry—Test method for determining radio-opacity of materials
Chinese Name:	牙科学　测定材料的X射线阻射性试验方法
Chinese Classification:	C33    Stomatologic device, equipment and material
Professional Classification:	YY    Professional Standard - Pharmaceutics
ICS Classification:	11.060.10 11.060.10    Dental materials 11.060.10
Source Content Issued by:	National Medical Products Adminstration
Issued on:	2019-10-23
Implemented on:	2020-4-1
Status:	valid
Target Language:	English
File Format:	PDF
Word Count:	3500 words
Translation Price(USD):	105.0
Delivery:	via email in 1~3 business day

本标准规定了用一种标准铝板作为标准品，以测定材料X射线阻射性的试验方法。此方法是设计用于区别具有临床意义水平的X射线阻射性，而不考虑影响精度的因素，也不考虑影响X射线阻射性的自身因素（诸如背景噪声、X射线能量、灰度校准和图像增强)。虽然，这些影响因素能够改变X射线阻射性的数值，但是不能改变与标准厚度的标准品（例如铝)相比较的对应趋势。本试验可以通过牙科X射线机的传统或数字传感技术来完成。