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CEMENT 151
important of these preparations, and most universally used.
It may be obtained in various shades to harmonize with the
color of the teeth, and is much more lasting than the oxy-
chlorid. It is largely used for temporary filling work, for
cementing crowns and bridges, inlays, orthodontia appliances,
and as an intermediate (between the filling and cavity).
(2)
The Oxyphosphate of Copper (color inky black) is extremely
sticky, and clings tenaciously to dry cavity walls. It is also
antiseptic (against infection) in character, and markedly
bland to sensitive cavities. For this reason it is used for
filling cavities, pulp chambers and canals in temporary teeth;
also cavities in permanent teeth whose sensitiveness will not
permit of proper cavity preparation. On account of its color
it has to be confined to posterior teeth. (3) The Oxychlorid
of Zinc is now seldom used as a filling material, except in root
canals, as it quickly disintegrates in contact with moisture.
It is extremely irritating to vital tissues, and cannot be used in
close proximity to the pulp, but is still utilized by some as an
intermediate, on account of its antiseptic properties and its
white color. (4) The Silicate Cements, more recently intro-
duced, are still in a stage of experimentation. Great claims
are made for them by their manufacturers as permanent filling
materials, if properly handled; but there is a great variation
in the results so far obtained by different operators. They
are translucent and more nearly harmonize with the color and
appearance of enamel than the other cements.
Advantages of Cements.
1. Non-conductivity (except silicates, most of which
require an intermediate).
2. Harmonious color (except oxyphosphate of copper,
which is black).
3. Adhesiveness to cavity walls (except silicates).
4. Ease of introduction.
important of these preparations, and most universally used.
It may be obtained in various shades to harmonize with the
color of the teeth, and is much more lasting than the oxy-
chlorid. It is largely used for temporary filling work, for
cementing crowns and bridges, inlays, orthodontia appliances,
and as an intermediate (between the filling and cavity).
(2)
The Oxyphosphate of Copper (color inky black) is extremely
sticky, and clings tenaciously to dry cavity walls. It is also
antiseptic (against infection) in character, and markedly
bland to sensitive cavities. For this reason it is used for
filling cavities, pulp chambers and canals in temporary teeth;
also cavities in permanent teeth whose sensitiveness will not
permit of proper cavity preparation. On account of its color
it has to be confined to posterior teeth. (3) The Oxychlorid
of Zinc is now seldom used as a filling material, except in root
canals, as it quickly disintegrates in contact with moisture.
It is extremely irritating to vital tissues, and cannot be used in
close proximity to the pulp, but is still utilized by some as an
intermediate, on account of its antiseptic properties and its
white color. (4) The Silicate Cements, more recently intro-
duced, are still in a stage of experimentation. Great claims
are made for them by their manufacturers as permanent filling
materials, if properly handled; but there is a great variation
in the results so far obtained by different operators. They
are translucent and more nearly harmonize with the color and
appearance of enamel than the other cements.
Advantages of Cements.
1. Non-conductivity (except silicates, most of which
require an intermediate).
2. Harmonious color (except oxyphosphate of copper,
which is black).
3. Adhesiveness to cavity walls (except silicates).
4. Ease of introduction.
