Metamerism refers to color appearance changes under different lighting conditions. Which statement best describes this phenomenon?

Metamerism refers to color appearance changes under different lighting conditions. Which statement best describes this phenomenon?

• A. Metamerism is a color appearance change under different lighting; it can cause a restoration to look different in various environments, requiring standardized lighting.
• B. Metamerism is the process of polishing metal surfaces to reduce shine
• C. Metamerism is the mismatch between chair-side and lab shade guides
• D. Metamerism is the color change due to aging of porcelain

Answer: (A)

Metamerism is about how color appearance changes with different lighting because the spectrum of the light interacts with the material’s colorants. In dentistry, this means a crown or veneer that looks like a perfect match under one light can look different in another environment, such as daylight versus office fluorescent lighting. Because of this, shade matching and final evaluation should be done under standardized lighting, or under lighting that simulates where the restoration will be seen, to minimize color discrepancies. The other statements don’t fit because one describes changing shine from polishing (not color under lighting), another describes a mismatch between chair-side and lab shade guides (a tool issue, not lighting-related color change), and the last describes color change due to aging (a time-based change, not metamerism).

Metamerism is about how color appearance changes with different lighting because the spectrum of the light interacts with the material’s colorants. In dentistry, this means a crown or veneer that looks like a perfect match under one light can look different in another environment, such as daylight versus office fluorescent lighting. Because of this, shade matching and final evaluation should be done under standardized lighting, or under lighting that simulates where the restoration will be seen, to minimize color discrepancies.

The other statements don’t fit because one describes changing shine from polishing (not color under lighting), another describes a mismatch between chair-side and lab shade guides (a tool issue, not lighting-related color change), and the last describes color change due to aging (a time-based change, not metamerism).