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The enamels, or colors, which replace the enamel, should approacli the
colors of the tooth in their respective locations. The intensity of their
piijments and the thickness of the la\er ot the enamel i;'n\'crn their intensity
of col enamels should be more fusible than tlie foundation and shouUl be a
porcelain of a finer grain.
There is a difference of opinion regarding the
application of porcelain for inlays, and this has
methods of
flpplyins Porcelain. given rise to dift'erent methods of applying the por-
celain in the construction. There are those who
apply the enamel in layers ; others who advocate building in sections
some who prefer to mix the colors : wdiile there are still others who
prefer to construct the inlay by using a mono-chromatic porcelain of a
lighter hue than the tooth, and to color the cement with pigments to
appro.ximate the color of the tooth. The method of using porcelains
of a lighter hue seems to have no advantage, except for labial cavities,
and it is open to unfavorable criticism. It may be advantageously ap-
plied, however, in labial cavities where the angle of incidence is always
such that some rays are feebly reflected and others partially absorbed
by the cement. It seems hardly possible to construct inlays for inciso-
approximal cavities, requiring two or more colors, by lightening the
porcelain and coloring the cement to match the colors of the differ-
ent sections of the tooth. Large inlays constructed in this wa_\- have a
uniformity of color, which is objectionable.
The method of building inlays in layers is prob-
ably the most popular one. Enough foundation body
Buildina in Caycrs.
to replace approximately the dentin and the lingual
]ilate of the enamel should be applieil and tired to a high biscuit. It should
be built s'llidlv into the matrix and contoured, allowing for shrinkage. If
it is not the desired contour after it has been biscuited, more of the foun-
dation body may be added and the firing repeated. The enamels are now
applied and the shading is varied from the gingival margin to the incisal
edge. In the application of the enamels care should be taken t ;; prevent
porcelains of different colors from mixing when applying them in their
respective position. The colors should be applied separately and bis-
cuited, then a uniform color should be applied over the entire mass and
fused. If the colors are applied intensely enough to reflect through the
uniform color, there will be a harmonizing effect that more nearly ap-
proaches the natural tooth structure in appearance, while each particular
color preserves its identity. This method obviates the necessity for
using porcelain of a lighter hue and adding pigments to the cement. It
90
The enamels, or colors, which replace the enamel, should approacli the
colors of the tooth in their respective locations. The intensity of their
piijments and the thickness of the la\er ot the enamel i;'n\'crn their intensity
of col
porcelain of a finer grain.
There is a difference of opinion regarding the
application of porcelain for inlays, and this has
methods of
flpplyins Porcelain. given rise to dift'erent methods of applying the por-
celain in the construction. There are those who
apply the enamel in layers ; others who advocate building in sections
some who prefer to mix the colors : wdiile there are still others who
prefer to construct the inlay by using a mono-chromatic porcelain of a
lighter hue than the tooth, and to color the cement with pigments to
appro.ximate the color of the tooth. The method of using porcelains
of a lighter hue seems to have no advantage, except for labial cavities,
and it is open to unfavorable criticism. It may be advantageously ap-
plied, however, in labial cavities where the angle of incidence is always
such that some rays are feebly reflected and others partially absorbed
by the cement. It seems hardly possible to construct inlays for inciso-
approximal cavities, requiring two or more colors, by lightening the
porcelain and coloring the cement to match the colors of the differ-
ent sections of the tooth. Large inlays constructed in this wa_\- have a
uniformity of color, which is objectionable.
The method of building inlays in layers is prob-
ably the most popular one. Enough foundation body
Buildina in Caycrs.
to replace approximately the dentin and the lingual
]ilate of the enamel should be applieil and tired to a high biscuit. It should
be built s'llidlv into the matrix and contoured, allowing for shrinkage. If
it is not the desired contour after it has been biscuited, more of the foun-
dation body may be added and the firing repeated. The enamels are now
applied and the shading is varied from the gingival margin to the incisal
edge. In the application of the enamels care should be taken t ;; prevent
porcelains of different colors from mixing when applying them in their
respective position. The colors should be applied separately and bis-
cuited, then a uniform color should be applied over the entire mass and
fused. If the colors are applied intensely enough to reflect through the
uniform color, there will be a harmonizing effect that more nearly ap-
proaches the natural tooth structure in appearance, while each particular
color preserves its identity. This method obviates the necessity for
using porcelain of a lighter hue and adding pigments to the cement. It
90
