8-- Dental Composite- Shades and Opacities: Alkhazaleh

Indications of resin-based composite in anterior area

Indications of resin-based composite in anterior area

Hue

The color family (Red, Blue, Green, ETC)

Shade guide: A

Brown

70% of world population

Shade guide: B

Yellow + Brown

15% of world population

Shade guide: C

Grey + Brown

10% of the world population

Shade guide: D

Red + Brown

5% of the world population

Chroma

Purity of a color - saturation

Lower chroma =

less pure (more washed out)

Never choose chroma by

incisal area

Cervical: more chromatic (dentin)

Value

Lightness of a color

Munsell color system

Transparent

allows the light to freely pass through. Can see through it almost clearly

Translucent

Allows light to pass partially through but not showing the distinct view on the other side.

Opaque

Blocking and preventing light from passing through an object

Body combines the

optical properties of both enamel and dentin --> intermediate translucency

Thick dentin =

very opaque restoration

Thick enamel =

Gray appearance due to increased translucency even if you select correct shade

T or F

Composite is in the same shades among different manufactures

false

Shade selection steps

1. Turn the dental light off

2. Perform shade selection at a distance of about 12-15 inches

3. Place the tab on the same plane and vertical orientation

4. Select the shade within 5 seconds

5. Perform at the beginning (before placing the rubber dam)

Why before rubber dam isolation