CDC CDC Shade Matching & Color Science

Question 1

Which three dimensions of color are used in the Munsell color system as applied to dental shade matching?

Accepted Answer

Hue, chroma, and value

Answer

Brightness, saturation, and tone

Answer

Red, green, and blue

Answer

Opacity, translucency, and fluorescence

Question 2

Metamerism in dental ceramics refers to which phenomenon?

Accepted Answer

Two restorations appearing to match under one light source but not another

Answer

The fluorescence of porcelain under UV light

Answer

Color change during firing due to pigment burnout

Answer

The shift in translucency as porcelain thickness increases

Question 3

Which shade guide is most commonly used in US dental ceramics laboratories for porcelain-fused-to-metal and all-ceramic restorations?

Accepted Answer

VITA Classical A-D shade guide

Answer

Chromascop shade guide

Answer

Trubyte Bioform shade guide

Answer

Toothguide 3D-MASTER

Question 4

What is the primary reason a ceramist should evaluate shade under natural daylight or a daylight-corrected lamp at 5500 to 6500 K?

Accepted Answer

Daylight provides a balanced full-spectrum reference that minimizes color bias from incandescent or fluorescent sources

Answer

Natural light activates the fluorescent pigments in porcelain for accurate reading

Answer

Dental porcelain is only visible under natural daylight conditions

Answer

It matches the color temperature of intraoral photography flashes

Question 5

Which optical property of dental ceramics describes the partial transmission and scattering of light, giving teeth their lifelike depth?

Accepted Answer

Translucency

Answer

Opacity

Answer

Fluorescence

Answer

Opalescence

Question 6

When a dental ceramist notices that a completed crown appears darker at the cervical third than expected, which corrective step is most appropriate before glazing?

Accepted Answer

Apply a thin layer of a lighter-value cervical modifier and re-fire

Answer

Increase glaze thickness at the cervical to lighten reflectance

Answer

Re-fire the crown at a higher temperature to burn off dark pigments

Answer

Apply opaque paint over the entire cervical region