CCE Color Science & Shade Matching Flashcards
6 cards from real CCE practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 CCE Color Science & Shade Matching flashcards as text
Which spectrophotometer measurement mode is most accurate for measuring tooth color in vivo?
Answer: Specular excluded (SCE)
Specular excluded (SCE) mode filters out surface gloss reflections, providing a more accurate reading of the actual tooth body color.
The CIELAB color space is used in dental ceramics because:
Answer: It defines color in perceptually uniform intervals, correlating numerical differences with visual perception
CIELAB is perceptually uniform, meaning equal numerical differences (ΔE) correspond to approximately equal perceived color differences, making it ideal for quality control.
A ceramist notices that a completed crown appears darker in the mouth than the selected shade. The most likely cause is:
Answer: The surrounding gingival tissue casting a shadow effect
Gingival tissue and the oral environment can cast shadows, making restorations appear darker in situ compared to evaluation on a white shade guide background.
Internal characterization in dental ceramics is used to:
Answer: Add stains and effects within ceramic layers to replicate natural tooth features like check lines and hypocalcification
Internal characterization involves placing stains, modifiers, and tints within the ceramic layers during buildup to reproduce natural features invisible on the surface.
The color of a ceramic restoration appears to shift after glazing compared to before. What is the most common reason?
Answer: Glazing increases the translucency and surface reflectance, altering the perceived value and chroma
Adding a glaze layer increases surface reflectance and slightly alters the optical depth of the restoration, commonly shifting the perceived color, particularly value.
When communicating a complex shade to a ceramist, which documentation method provides the most complete information?
Answer: A combination of calibrated photographs, a detailed shade map, and spectrophotometer data
Combining calibrated photographs, a hand-drawn shade map noting characterizations, and objective spectrophotometer data gives the ceramist the most complete picture of the target shade.