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YY/T 0631-2008 English PDF

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YY/T 0631-2008: Dental materials. Determination of colour stability
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Basic data

Standard ID YY/T 0631-2008 (YY/T0631-2008)
Description (Translated English) Dental materials. Determination of colour stability
Sector / Industry Medical Device & Pharmaceutical Industry Standard (Recommended)
Classification of Chinese Standard C33
Classification of International Standard 11.060.10
Word Count Estimation 5,586
Date of Issue 2008-04-25
Date of Implementation 2009-06-01
Quoted Standard GB/T 16422.2; CIE
Adopted Standard ISO 7491-2000, IDT
Regulation (derived from) SFDA [2008] No. 192
Issuing agency(ies) State Food and Drug Administration
Summary This standard specifies the dental materials in the flooded color stability after light irradiation measurement method.

YY/T 0631-2008: Dental materials. Determination of colour stability

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Dental materials.Determination of colour stability ICS 11.060.10 C33 People's Republic of China pharmaceutical industry standards YY/T 0631-2008/ISO 7491.2000 Determination of color stability of dental materials (ISO 7491.2000, IDT) Posted 2008-04-25 2009-06-01 implementation State Food and Drug Administration issued

Foreword

This standard is identical with ISO 7491.2000 "Determination of color stability of dental materials." Color stability are important properties of dental materials One of the standard test methods can be referenced in other standards. This standard is based on ISO 7491.2000 re-drafted. This standard and ISO 7491.2000 and the main difference between the following reasons. --- Delete "normative references" in the "ISO 3696. 1987". And in this standard as "distilled or deionized water" alternative In. "ISO 3696 1987" cited "Class 2 water." Because it is technically feasible. --- 3.1.1 light source "illumination on the specimen is 150000lx, the entire surface of the sample at any time should not be partial illumination ± 10% from the mean. "Changed to" illuminance on the sample amounted 150000lx ± 15000lx "improve operability. --- 3.2.3 color compared to the international standards set forth in south/north direction diffuse daylight. In the northern hemisphere of the selection criteria of the International Standard Registration northbound diffuse daylight. And ISO 7491.2000 technical differences have been incorporated into the text, and they involved clauses in the margin of a single vertical line Identity. This standard was proposed by the State Drug Administration. This standard by the National Standardization Technical Committee of Dental Materials and Devices and equipment. This standard by the State Drug Administration of Peking University Medical Device Quality Supervision and Testing Center is responsible for drafting. The main drafters of this standard. Lin Hong, Yuan Shen Po, Zhang Yan, Zheng Rui, Zheng Gang. YY/T 0631-2008/ISO 7491.2000 Determination of color stability of dental materials

1 Scope

This standard specifies the method for determination of dental materials in color stability after irradiation of light soaking.

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, according to research encourages the parties to the agreement Study whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard. GB/T 16422.2 Plastics - Methods of exposure to laboratory light sources Part 2. Xenon arc lamp (GB/T 16422.2-1999, idt ISO 4892-2.1994) CIE Publication 15.2 Colorimetry Test Method 3 3.1 appliance 3.1.1 light source Medium pressure xenon lamp, the color temperature between 5000K to 10000K. According to GB/T 16422.2 measuring illuminance on the sample should reach 150000lx ± 15000lx. Xenon lamp can also be used with other equivalent light source. Xenon lamps and UV filter (3.1.2) after use 1500h, due to aging of its emission intensity vary, should be replaced. use Suitable light meter measuring illumination, and a corresponding control of the adjustment. 3.1.2 UV filter Optical glass (borosilicate glass), the light transmittance of 300nm or less should be less than 1% of the 370nm light of the above Transmission should be greater than 90%. 3.1.3 Test chamber 3.1.3.1 circulating water bath Distilled or deionized water, maintained at a temperature (37 ± 5) ℃, the water in the sample (10 ± 5) mm, the specimen is placed in parallel with the test chamber bottom. 3.1.3.2 sample holder From an opaque material, preferably metal, can be used to hold the test pieces of 50mm diameter. Figure 1 is a suitable sample holder. Step 3.2 3.2.1 Sample Preparation Each dental materials prepared by standard sample size, sample preparation methods and conditions as well as control samples for both provisions. These standards should be present Standard used in combination. 3.2.2 irradiation test Half of the sample holder according to FIG. 1, or tin, or wrapped in aluminum foil. For dental samples, tin or aluminum foil parallel to the long axis of the tooth wrapped Anterior Chambers half. Fitted with UV filter (3.1.2), the sample was placed in a water bath, with a xenon lamp (3.1.1) applied to the sample (24 ± 1) h. Note that to avoid trial Shaded block loading. YY/T 0631-2008/ISO 7491.2000

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