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YY/T 1646-2019: Dentistry - Test method for determining radio-opacity of materials Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid
YY/T 1646-2019: Dentistry - Test method for determining radio-opacity of materials---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/YYT1646-2019YY PHARMACEUTICAL INDUSTRY STANDARD OF THE PEOPLE'S REPUBLIC OF CHINA ICS 11.060.10 C 33 YY/T 1646-2019 / ISO 13116.2014 Dentistry - Test method for determining radio-opacity of materials (ISO 13116.2014, IDT) Issued on: OCTOBER 23, 2019 Implemented on: APRIL 1, 2020 Issued by. National Medical Products Administration Table of ContentsForeword... 3 1 Scope... 4 2 Normative references... 4 3 Terms and definitions... 4 4 Requirements... 4 5 Specimen preparation... 5 6 Apparatus... 5 7 Test conditions and procedures... 7 8 Result processing... 8ForewordThis standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard is identical to ISO 13116.2014 Dentistry - Test Method for Determining Radio-Opacity of Materials. The Chinese documents that have consistent correspondence with the international documents normatively referenced in this standard are as follows. -- GB/T 9937 Dentistry - Vocabulary (ISO 1942, IDT). Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying these patents. This standard was proposed by the National Medical Products Administration. This standard is under the jurisdiction of the National Technical Committee on Dental Materials and Instruments Equipment of Standardization Administration of China (SAC/TC99). Drafting organizations of this standard. Dental Medical Devices Testing Center of Peking University School of Stomatology, Peking University Hospital of Stomatology, Hospital of Stomatology of Hebei Medical University, and KaVo Kerr Dental (Suzhou) Co., Ltd. Main drafters of this standard. Li Yuan, Lin Hong, Zhang Tiejun, Dong Fusheng, Zeng Jiajia, Xin Junbin, and Yu Meiqing. Dentistry - Test method for determining radio-opacity of materials1 ScopeThis standard specifies a test method for determining the X-ray opacity of a material by using a standard aluminum plate as a standard. This method is designed to distinguish X-ray opacity at a clinically meaningful level without considering factors that affect accuracy, nor factors that affect X-ray opacity itself (such as background noise, X-ray energy, grey scale correction, and image enhancement). Although these influencing factors can change the value of X-ray opacity, they cannot change the corresponding trend compared with a standard of standard thickness (such as aluminum). This test can be completed by using conventional or digital sensing technology in dental X-ray machines.2 Normative referencesThe following documents are essential for the application of this document. For any dated referenced document, only the dated version applies to this document. For any undated referenced document, the latest version (including all amendments) applies to this document. ISO 1942 Dentistry vocabulary ISO 3665 Photography Intra-oral dental radiographic film and film packets Manufacturer specifications3 Terms and definitionsFor this document, the terms and definitions defined in ISO 1942 apply.4 RequirementsThis standard does not give pass/fail limits for X-ray opacity. If the manufacturer claims that the material is X-ray opaque, the X-ray opacity may be tested in accordance with Chapter 7 and the value obtained shall be at least equivalent to the minimum value specified in the applicable product standard. NOTE. Aluminum has a radiopacity equivalent to that of dentin; therefore, if a 1 mm thick material has ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of English version of YY/T 1646-2019 be delivered?Answer: The full copy PDF of English version of YY/T 1646-2019 can be downloaded in 9 seconds, and it will also be emailed to you in 9 seconds (double mechanisms to ensure the delivery reliably), with PDF-invoice.Question 2: Can I share the purchased PDF of YY/T 1646-2019_English with my colleagues?Answer: Yes. The purchased PDF of YY/T 1646-2019_English will be deemed to be sold to your employer/organization who actually paid for it, including your colleagues and your employer's intranet.Question 3: Does the price include tax/VAT?Answer: Yes. 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