ASTM-E2466 2006

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E2466-06 Standard Test Method for Colorimetry of Teeth Using Digital Still Camera Technology

Published By	Publication Date	Number of Pages
ASTM	2006	13

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Categories: 11.060.01 - Dentistry in general, ASTM

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Description

1.1 This test method covers the procedure, instrumental requirements, standardization procedures, material standards, measurement procedures, and parameters necessary to make precise measurements of in-vivo tooth color and tooth whiteness. In particular it is meant to measure the color of teeth in selected human subjects.

1.2 Digital images are used to evaluate tooth color of both posterior and anterior dentition (teeth). All other non-relevant parts, such as gums, spaces, etc., must be separated from the measurement and the analysis. All localized discoloration; such as stains, inclusions, etc., may be separated from the measurement and the analysis.

1.3 The broadband reflectance factors of teeth are measured. The colorimetric measurement is performed with a digital still camera while using an illuminator(s) that provides controlled illumination on the teeth. The measured data from a digital image are captured using a DSC. This test method is particularly useful for the gamut of tooth color which is:

1.3.1 CIE L* from 55 to 95,

1.3.2 CIE a* from 3 to 12,

1.3.3 CIE b* from 8 to 25 units.

1.4 The wavelengths for this test method include that portion of the visible spectrum from 400 to 700 nm.

1.5 Data acquired using this test method is for comparative purposes used during clinical trials or other types of research.

1.6 This test method is designed to encompass natural teeth, artificial teeth, restorations, and shade guides.

Note 1

This procedure may not be applicable for all types of dental work.

1.7 The apparatus, measurement procedure, data analysis technique are generic, so that a specific apparatus, measurement procedure, or data analysis technique may not be excluded.

1.8 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.

This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and to determine the applicability of regulatory limitations prior to use.

PDF Catalog

PDF Pages	PDF Title
1	Scope Referenced Documents
2	Terminology Summary of Test Method Significance and Use Interferences
3	Apparatus
4	FIG. 1 FIG. 2 FIG. 3 FIG. 4
5	Sampling, Test Specimens, and Test Units TABLE 1 FIG. 5
6	Preparation of Apparatus FIG. 6
7	Conditioning Calibration and Standardization FIG. 7 FIG. 8
9	Calculation or Interpretation of Results Report
10	Precision and Bias Keywords TABLE 2
11	A1. DIGITAL CAMERA SYSTEM COMPONENTS, GEOMETRY, AND NOMENCLATURE ILLUSTRATIONS A1.1 DSC System Geometry (Coordinate System) and Angular Convention A1.2 Typical Block Diagram for a Digital Still Camera Based Colorimeter A1.3 Typical Block Diagram for Source Illumination Unit A1.4 Typical Block Diagram for Detector Optical Elements FIG. A1.1 FIG. A1.2 FIG. A1.3 FIG. A1.4
12	A1.5 Nomenclature and Identification of Teeth A1.6 Digital Camera System Geometry REFERENCES FIG. A1.5 FIG. A1.6

Additional information

Standard Title	E2466-06 Standard Test Method for Colorimetry of Teeth Using Digital Still Camera Technology
Published Code	ASTM
Publication Date	2006
Pages Count	13
ICS Codes	11.060.01 - Dentistry in general

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ASTM-E2466 2006

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