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Easy Shade System vs. Visual Methods: A Comparative Evaluation with Digital Shade Matching Device E220
2025-07-26
Background
In today’s esthetically driven dental landscape, patients are increasingly sensitive to the color and appearance of restorations. They may not understand the technical process, but they can easily judge whether the final restoration harmonizes with their natural dentition. Among all esthetic factors, shade matching is one of the most critical elements in achieving a successful outcome.
Traditionally, shade selection has been done visually by clinicians or dental auxiliaries. However, human perception is subject to variability due to lighting, fatigue, and even color vision deficiencies. As esthetic expectations rise—especially for single-unit anterior restorations—dentists are turning to digital technologies to improve accuracy and consistency.
The VITA Easyshade System, combined with the Digital Shade Matching Device E220, offers an objective, technology-assisted approach to shade matching. This article compares its effectiveness with that of traditional visual methods.
About the Technology
Modern shade-matching devices include spectrophotometers, colorimeters, and digital analyzers:
Spectrophotometers offer the highest accuracy for absolute color measurement and are not affected by metamerism.
Colorimeters are more affordable and user-friendly but may suffer from filter aging and reduced repeatability.
The Digital Shade Matching Device E220 utilizes a colorimetric distribution of 26 tooth shades, organized into five value levels and further segmented by hue and chroma. This structured 3-step system simplifies the selection process and improves consistency.
Additionally, the device uses CIELAB color space—an international standard developed by the CIE—to quantify color values with L* (lightness), a* (green to red), and b* (blue to yellow) coordinates, making it suitable for accurate comparisons of natural teeth and restorative materials.
Why Digital Shade Matching Matters
Studies have shown that color vision deficiencies affect up to 14% of male dentists, potentially impacting their ability to accurately match shades. Thus, many researchers recommend routine screening of dentists and dental staff using tests like the Farnsworth 100-Hue Test.
Digital devices, such as the E220, can reduce the variability of human perception and provide a repeatable, objective result—serving as an important adjunct to visual methods.
Study Overview
In this study, two experienced visual evaluators—selected based on superior shade-matching ability using the Vita-Vita test—were compared to the Vita Easyshade System.
Methodology:
Subjects: 40 patients with unrestored, unstained left maxillary central incisors
Procedure:
Each evaluator selected a shade from the central area of the tooth.
If opinions differed, a consensus shade was agreed upon.
The same area was then scanned using the Easyshade E220.
Device: The Vita Easyshade spectrophotometer provided shade readings in different measurement modes: tooth, shade tab, and restoration.
Analysis: Statistical comparison using a standard t-test at a 95% confidence interval.
Results
The Easyshade system achieved a 97.5% match rate with the visual method.
Statistically, there is 95% confidence that its performance will not drop below 92.7%.
While not flawless, the device shows a high degree of reliability and consistency.
Discussion
Shade selection is one of the most nuanced aspects of esthetic dentistry. While human expertise remains indispensable, digital systems like the E220 bring objectivity and repeatability to the process.
It’s important to note that digital tools do not replace the trained human eye but instead complement it—helping to reduce errors, especially for clinicians with limited color discrimination abilities or in challenging lighting conditions.
Conclusion
The combination of the Vita Easyshade System and the Digital Shade Matching Device E220 offers a scientific, structured, and highly accurate approach to dental shade matching. It surpasses traditional methods in consistency and repeatability, making it a valuable tool in clinical practice.
However, the ultimate test of success remains the patient's perception. Whether using digital or visual methods, the question remains: Does it match?
In the art and science of dentistry, technology should support—rather than replace—the clinician’s expertise. Devices like the E220 serve as reliable allies in delivering esthetically superior results.
📍 Learn more about the E220 Digital Shade Matching Device:
👉 https://www.koungsundental.com/products_details/ApexLocator.html
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