An Improved Composition for Dental Purposes.
Year: 1898

page_text: An Improved Composition for Dental Purposes.
We, G. W. RUTTERFORD AND SON, LIMITED, of 10, Poland Street, in the County
of London, Dealers in Dental Materials, and JOHN PARK HUNTLEY, of 130, Great
Portland Street, in the same County, Dental Surgeon, do hereby declare the
nature of this invention to be as follows;-
--
This invention relates to an improved composition for dental purposes, such
as for the manufacture of artificial gums for false teeth, for the filling or stopping
of teeth, or for fastening teeth to plates.
An important feature of the invention is, that the composition can be applied
in a semi-fluid condition, without the application of heat, and will dry and set
rapidly, so that when used as an artificial gum it will have a glossy, natural and
life-like appearance.
The improved composition is formed by dissolving together, in a suitable solvent,
celluloid and camphor so as to form a thick or semi-fluid mass or liquid, to which
a suitable colouring medium is added to bring it to a shade or tint corresponding
to that of the natural gums.
As an example, the composition may be prepared in the following manner, that
is to say:
I first form the solvent by faking a mixture of absolute alcohol and methylated
ether and adding thereto acetone. In this mixture I dissolve ordinary block
camphor, and then celluloid in a finely divided or rasped state. Finally, I add
the colouring medium, which may be ordinary magenta in sufficient quantity to
produce the shade or tint required.
The composition is preserved in glass stoppered bottles or vessels until required
for use.
When it is to be applied, say for producing a false gum, it is taken on a knife-
blade, or other suitable instrument, and is evenly distributed over the surface to
be covered, say on the front of the plate which carries the teeth, care being taken
that no air bubbles shall form, this being done by continuously pressing and
working the composition.
When it is dry, it has a glossy appearance, and does not require polishing. It
is both moisture-proof and air proof; will withstand the action of hot water, and
all the secretions of the mouth; and can be applied to plates of rubber, dental
alloy, or gold.
Data 41 20th day of August 1808

page_text: We, G. W. RUTTERFORD AND SON, LIMITED, of 10, Poland Street, in the County
of London, Dealers in Dental Materials, and JOHN PARK HUNTLEY, of 130, Great
Portland Street, in the same County, Dental Surgeon, do hereby declare the
nature of this invention and in what manner the same is to be performed, to be
particularly described and ascertained in and by the following statement, that is
-
to say:-
This invention relates to an improved composition for dental purposes, such
as for the manufacture of artificial gums, for the filling or stopping of teeth, or for
fastening mineral teeth to plates.
An important feature of the invention is, that the composition can be used in
a semi fluid condition without the application of heat, and will dry and set
rapidly. Moreover, when used as an artificial gum, which is the purpose it is
more particularly intended for, it will have a glossy and life like appearance, even
permitting of the variations in shade of the surface of the natural gums, as well
as the minute blood vessels of the natural gums being imitated.
Heretofore the so-called "porcelain continuous-gum work" has been considered
the most perfect imitation of the natural gums, but its use has been partially
abandoned in consequence of the extreme difficulty of working and repairing it,
as well as on account of its great expense, weight, and fragility.
Now, our improved composition obviates the difficulties of the porcelain con-
tinuous-gum-work. It can be applied to plates or cases of vulcanite, dental alloy,
gold, or other metal, is moisture and air proof, and will withstand the action of
hot water and all the secretions of the mouth.
The improved composition is formed by dissolving together in a suitable solvent,
celluloid, xylonite, or the like, and camphor, so as to form a thick or semi fluid
mass. It is coloured to a shade or tint corresponding to that of the natural gums,
either by using celluloid or the like, which has been previously coloured, or by
adding to the semi fluid mass a suitable colouring medium.
As an example, the composition may be prepared in the following manner:
The solvent is first made by mixing together in the following proportions:-
10 ounces absolute alcohol, specific gravity 795.
10 ounces methylated ether, specific gravity 730.
80 ounces acetone puriss,
3 ounces gum or block camphor.
To form the gum composition, celluloid is dissolved in the above solvent in the
proportion of 10 ounces celluloid to the above quantity of solvent, and to help the
solution the mixture is constantly stirred until a perfectly homogeneous mass is
obtained.
When the composition is to be applied, say for producing artificial gum, on
a vulcanite or metal plate or case, it is spread evenly over the surface, care
being taken to continuously press and work it to avoid the formation of air bubbles.
The surface of the case or plate should be previously roughened or drilled to
facilitate the adhesion of the composition, and the said surface should be painted
over with the solvent, whilst before application, the composition should be poured
out on to a slab and worked with a spatula to increase its consistency.
It is desirable to apply the composition in two or more coats, as a more uniform
surface and better results can be thus obtained.
In order to imitate the appearance of the minute blood vessels in the natural
gums, a very small quantity of deep red celluloid, xylonite, or other suitable
substance, in a more or less finely divided state, is added to the composition before

page_text: it has set. The colouring matter from these deep red particles partially diffusing
itself into the soft composition, gives a mottled appearance to the same; or if
the surface be worked slightly so as to move the particles about, a streaky effect,
resembling small thread-like blood vessels, is obtained.
When the composition has set, a final glaze is given to it by painting it over with
clear solvent.
Should any alterations be required, they can be easily effected either by cutting
away some of the composition, by dissolving with the aid of the solvent, or by
adding more of the composition should it be required.
The composition is preserved in glass stoppered bottles or vessels until required
for use.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed we declare that what
we claim is :-
1. A composition for dental purposes formed by reducing, celluloid, xylonite, or
the like, to a semi fluid or plastic state in a solvent containing camphor, sub-
stantially as described.
2. The improved composition for the manufacture of artificial gums (and for
other dental purposes) consisting substantially of 3 parts gum or block camphor,
and 10 celluloid, produced by first dissolving the camphor in a mixture of 10 parts
absolute alcohol, 10 parts methylated ether, and 80 parts acetone puriss, and then
adding and dissolving therein the celluloid.
3. An artificial gum for mineral teeth, consisting of celluloid coloured to a
natural shade and having its surface treated to represent blood vessels, sub-
stantially as described.
4. Our improved composition for dental purposes, substantially as hereinbefore
described, thus advantageously replacing the so-called porcelain continuous-gum
work.
Dated this 12th day of May 1899.
ERNEST E PASS,
Chartered Patent Agent,
78, Fleet Street, London, and 5A, Market Street, Nottingham.
Agent for the Applicants.