BAZOS/MAGNE
S
G
L
descriptive
H
C
V
objective
T
O
F
subjective
9 Elements
Fig 2 Dynamic light interaction will generate the visual synthesis which is influenced by nine elements: surface texture, gloss and luster (S/G/L); hue, chroma and value (H/C/V) and translucency, opalescence and fluorescence (T/O/F).
Incident Light Ray
Diffuse Reflection
Specular Reflection
Reflection
Fig 3 The term reflectance is used to denote the fraction of light energy that is reflected by the surface of a given material. If the surface is not plane but curved, as is the case with enamel above, it may still be considered to be made up of many very small, elementary plane surfaces.
ENAMEL
DENTIN
DEC
1.54
1.43
1.63
Refraction
Fig 4 The term refraction is used to denote a change in direction of propagation of light waves as a result of its traveling at different speeds at different points among the wave front between mediums of varying optical densities. Primary subsurface scattering is denoted by the radial arrow depictions.
333 THE INTERNATIONAL JOURNAL OF ESTHETIC DENTISTRY VOLUME 9 • NUMBER 3 • AUTUMN 2014
Made with FlippingBook Annual report