YY 0620-2008 English PDF

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YY 0620-2008: Dentistry. Casting gold alloys
Status: Obsolete

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
YY 0620-2008	599	Add to Cart	4 days	Dentistry. Casting gold alloys	Obsolete

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Basic data

Standard ID: YY 0620-2008 (YY0620-2008)
Description (Translated English): Dentistry. Casting gold alloys
Sector / Industry: Medical Device & Pharmaceutical Industry Standard
Classification of Chinese Standard: C33
Classification of International Standard: 11.060.10
Word Count Estimation: 15,177
Date of Issue: 2008-04-25
Date of Implementation: 2009-12-01
Quoted Standard: GB/T 228; GB/T 1423; GB/T 4340.1; GB/T 6682; GB/T 15072.1; GB/T 15072.2; GB/T 15072.3; GB/T 15072.4; GB/T 15072.5; GB/T 15072.6; GB/T 15072.7; GB/T 15072.8; GB/T 15072.9; GB/T 15072.10; GB/T 15072.11; GB/T 15072.12; GB/T 15072.13; GB/T 15072.14; GB/T 15072.15; GB/T 15072.16; GB/T 15072.17; GB/T 15072.18; GB/T 15072.19; GB/T 15072.20; YY 0621; ISO 3585
Regulation (derived from): SFDA [2008] No. 192
Issuing agency(ies): State Food and Drug Administration
Summary: This standard specifies the gold content (mass fraction) �� 60%, and gold and platinum group metals (platinum, palladium, iridium, ruthenium and rhodium) the total amount (mass fraction) �� 75% of dental casting gold alloys (hereinafter referred to as casting gold alloy) classification, requirements, test methods and packaging, labeling, instruction manual. This standard is not applicable to the production of ceramic veneers and dental prosthesis devices casting alloys.

YY 0620-2008: Dentistry. Casting gold alloys

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Dentistry.Casting gold alloys ICS 11.060.10 C33 People's Republic of China pharmaceutical industry standards Dentistry - Casting gold alloys (ISO 1562.2004, MOD) Posted 2008-04-25 2009-12-01 implementation State Food and Drug Administration issued

Foreword

This standard 5.1,5.2,5.3,5.4,5.5 and 5.6 are mandatory, others are recommended. This revised standard adopts ISO 1562.2004 "Dentistry Gold Alloy." The main modifications are as follows. The quote --- ISO 1562 standard ISO 6892, ISO 3696, ISO 9693, respectively, have been converted to GB/T 228, GB/T 6682 And YY 0621, this standard with the latter replace the former. --- ISO 1562 does not contain a possible biological hazards qualitative and quantitative requirements given only biological evaluation literature Head record. The standard recommended in the evaluation of possible biological hazards, the see YY/T 0268. Reference increase The YY/T 0268. --- ISO 1562 Standard Test Method for casting gold alloy chemical composition and density are not specified, the provisions of this standard were adopted GB/T 15072 And GB/T 1423 method, and these two national standards as reference standards. --- ISO 1562 cites Vickers hardness test method standards, and provides the manufacturer "provides Vickers hardness" 7.4a) in, but There is no provision requiring the Vickers hardness, this increases the Vickers hardness standard requirements (5.6) and test methods (6.3.5). --- The "corrosion 5.7", "5.8 tarnish resistance" and "5.9 Electrochemical Properties" to recommended. --- "Break outer" and "nipper" phenomenon occurs due to the mechanical properties of test samples ISO 1562 design verification test, this standard Quasi modify mechanical properties of test samples ISO 1562 design, the deletion of the "cone shoulder sample", retained the "round clip Head "to" thread chuck "and" circular shoulder sample "(see 6.2.2 Figure 2), and an increase in the sample design of a threaded (See 6.2.2 Figure 1). --- Prepared in accordance with the requirements of this standard of national standards for the ISO 1562 clauses were adjusted. The "Sample 6", "7 sample preparation", "8 test" to "6 Test methods", "6.1 sample", "sample system 6.2 Preparation "," Test Method 6.3 "; the" information and instructions guide 9 "and" 10 logo "to" 7 packaging, labeling and instructions for use Book "," 5 Requirements "test method given in the adjustment to" 6 Test methods ", and in accordance with relevant state regulations supplement Charge related content. This standard Annex A, Annex B and Annex C is informative appendix. This standard was proposed by the State Food and Drug Administration. This standard by the National Standardization Technical Committee of Dental Materials and Devices and equipment. This standard has REVIEW billion of the New Materials Co., drafting. The main drafters of this standard. Feng Jing Su, Yang Yuhui, Liu Fu, Yang Hua.

Introduction

Precious metal content (mass fraction) of 25% to 75% of the standard cast alloy, see ISO 8891. As expected metal - base ceramic prosthesis using dental casting alloys and dual-use the precious metal content (mass fraction) At least 75% of the standard Gold Alloy see YY 0621. Dentistry - Casting gold alloys

1 Scope

This standard gives the gold content (mass fraction) ≥60%, and the total amount of gold and platinum group metals (platinum, palladium, iridium, ruthenium and rhodium) (mass fraction) ≥75% of dental casting gold alloys (hereinafter referred to as Gold Alloy) classification, requirements, test methods and packaging, labeling, instructions for use. This standard is not applicable to the production of ceramic dental prosthesis attached devices and the cast alloy surface.

2 Normative references

The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard. GB/T 228 metal materials at room temperature tensile test (GB/T 228-2002, idt ISO 6892.1998) GB/T 1423 precious metals and their alloys density measurement method GB/T 4340.1 Vickers hardness test - Part 1. Test methods GB/T 6682 analytical laboratory use specifications and test methods (GB/T 6682-92, neq ISO 3696. 1987) GB/T 15072.1 ~ 15072.20 precious metals and their alloys - YY 0621 Dental PFM system (YY 0621-2008, ISO 9693-1999, MOD) ISO 3585 laboratory glassware nature

3 Terms and Definitions

The following terms and definitions apply to this standard. 3.1 Holding the casting in the mold, wax mold uppermost exposed metal, and placed on the plate surface and the natural circulation of air in contact until the cast Member temperature is lowered to ambient temperature cooling. 3.2 Gold Alloy, in accordance with this standard are also intended for production according to YY 0621 metal - ceramic dental prosthesis substrate. 3.3 Direct contact with the cast gold alloy containers. Category 4 Taking into account the effect of this standard, according to the mechanical properties of dental gold alloy and its recommended range of applications, classified as follows. Type Ⅰ. low strength to withstand the stress of the cast alloy --- small castings, such as inlay; Ⅱ type. --- moderate cast alloy castings to withstand moderate stress, such as inlays, onlays and crowns; Ⅲ type. high-strength cast alloy to withstand high stress --- castings, such as onlays, bridges, crowns and saddle group; Ⅳ type. high strength cast alloy to withstand high stress --- and a thin cross section castings, such as saddle group, the tongue palate bar, snap ring, telescopic crowns, Casting crowns and denture bracket. ......

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