Dental Material Color Stability Tester: Professional Solution for Material Durability
This article introduces the dental material color stability tester, a critical device for evaluating the color retention performance of dental materials under simulated oral conditions. Designed to comply with international standards, it provides precise data on material discoloration, aiding in quality control and product development.
Applicable Standards
The tester adheres to key global benchmarks:
- ISO 7491:2000 (equivalent to YY/T 0631-2008 in China)
- ANSI/ADA 80-2001 (US dental material color stability standard)
These standards ensure reliable assessment of material performance under accelerated aging conditions.
Main Parameters
| Parameter | Specification |
|---|---|
| Light Source | Xenon arc lamp (150,000 lx ±15,000 lx) |
| UV Filter | <1% transmittance below 300nm, >90% above 370nm |
| Water Bath Temperature | 37℃ ±1℃ (simulating oral environment) |
| Test Duration | 24 hours (accelerated aging) |
| Color Difference | ΔE calculation (CIE Lab color space) |
Working Principle
The device uses a xenon arc lamp to simulate natural light aging, combined with a circulating water bath to replicate oral humidity and temperature. Sensors monitor irradiance, temperature, and humidity in real-time, ensuring consistent test conditions. Automated safety features (e.g., over-temperature protection, door-interlock system) enable unsupervised operation.
Test Principle
- Sample Preparation: Specimens are mounted in a non-reflective holder and submerged in 37℃ water.
- Aging Simulation: Samples are exposed to 150,000 lx light for 24 hours.
- Color Analysis: Post-test, color differences (ΔE) are calculated using a spectrophotometer under D65 illuminant conditions. Visual assessments are conducted by trained observers in north-facing daylight to detect subtle hue shifts.
Key Advantages
- Compliance: Meets ISO/ADA requirements for global lab certification.
- Precision: Advanced sensors and algorithms ensure accurate ΔE measurements.
- Efficiency: Accelerated testing reduces product development timelines.
This tester is essential for manufacturers and labs seeking to validate the long-term aesthetics of dental composites, ceramics, and restoratives. By simulating years of oral exposure in days, it drives innovation in material science while upholding clinical standards.