Shade characteristics of natural teeth

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Opalescent incisal edge Highly opalescent incisal edges are very common in young teeth. Reproducing this characteristic is difficult, but not impossible. The opalescence results in a concentration of light in the incisal edge, which is also known as incisal halo. The incisal halo in a natural tooth is a spontaneous occurrence, due to the special light refraction in dental enamel. Unfortunately, the opalescent materials do not refract the light as intensely as natural enamel. Therefore, we have to use pigmented materials to reproduce the incisal halo. Immediately after the translucent area of the opalescent edge has been reproduced, the incisal halo is created using Incisal Edge, a material that has been especially developed for this purpose. Again, this material should be allowed to mix with the previously applied Effect Material 1. For this shade characterization, the incisal edge of the completed build-up has to be reduced following the pattern of the previously designed mamelons, which are then covered with transparent material up to the reduced area. Next, Effect Material 1 from the Impulse 1 Kit is applied. It is important that this material does not excessively mix with the materials of the build-up. The opalescent incisal edge and the appearance of the incisal halo are clearly visible immediately after application. 10
Abrasion of the incisal edge Abrasion is the wear of the incisal edge (mostly the palatal area) caused by natural functions. If abrasion is present in the enamel, the morphology of the tooth is altered, together with the shade in the area of the abrasion. The latter occurrence is quite obvious, as abrasion causes a loss in enamel and exposes the dentin. Moreover, these areas often show signs of infiltration resulting in areas that demonstrate pronounced pigmentation. In this case, we will create a wear pattern using a highly saturated shade. Next, Occlusal Dentin brown and Occlusal Dentin orange are mixed in a 1:1 ratio. A small quantity of white stains is added to the mixture to render it slightly opaque. This mixture is used to fill the entire groove of the wear pattern to give it the appearance of internal dentin that has filtered between the enamel and dentin. This characteristic is reproduced after the crown has been completely layered. Once the palatal area has been contoured, a groove in the form of the intended wear pattern is created using a spatula. If the wear pattern should appear less aggressive, the 1:1 mixture of Occlusal Dentin brown and orange can be substituted by dentin material to which a small amount of dentin-coloured Shade material has been added to heighten the degree of saturation. The intensity can be regulated by the amount of Shade used. The wall of the groove is now stained using Crack Liner to block out the light in this area. Additionally, some white stains may be applied. In this case, the stains were applied to the distal area of the wear pattern. Another more intensive shade, such as in this case brown, may be applied to the bottom of the groove and to a wall of the wear pattern. Orange or khaki are yet other possibilities. 11
Page 1 and 2: Shade characteristics of natural te
Page 3 and 4: White, orange and brown enamel crac
Page 5 and 6: Here, however, the crack is created
Page 7 and 8: The same technique can be applied t
Page 9: The tooth morphology is now complet
Page 13 and 14: If the mamelons need to be more pro
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Page 17 and 18: When an entire anterior group of te
Page 19 and 20: Initial situation before treatment.
Page 21 and 22: Crown after having been cemented in
Page 23 and 24: Descriptions and data constitute no

Shade characteristics of natural teeth

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