BAZOS/MAGNE
C 2.5 mm
1.8 mm
2.2 mm
2.2 mm
M
1.9 mm
1.4 mm
1.4 mm
1.6 mm
I
0.2 mm
0.2 mm
0.2 mm 0.2 mm
DENTIN
+++
IOT
+++
Infinite Optical Thickness
Fig 14
Pooled averages with regards to labial dentin thickness for the maxillary triad at the cervical (C),
middle (M) and incisal (I) thirds. 44
to provide adequate tooth reduction to meet the specific objectives that are re- quired.
a stunning effect; an optical illusion of magnification 55 and spatial proximity is perceived with regards to the underlying dentin mamelons. This apparent mag- nification manifests in an incisobuccal direction, creating an optical illusion with regards to the position and dimension of dentin mamelons. This optical illusion is subdued in part by the birefringent nature of enamel, obscuring details ren- dering a hazy net appearance (Fig 15). Concurrently, dentin also exhibits mag- nification properties 56,57 due to the di- vergent radial fanning of the dentin tu-
Amplified visual perception effect
Due to the convex lens-like shape of enamel in conjunction with possessing an RRI of 1.63, optical distortion oc- curs. Thus, light being refracted within enamel, the DEC and subsequently in- ternally reflected from dentin produces
345 THE INTERNATIONAL JOURNAL OF ESTHETIC DENTISTRY VOLUME 9 • NUMBER 3 • AUTUMN 2014
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