the Apparatus Employed therefor.
Year: 1887

page_text: Date of Application, 2nd Aug., 1887.
Specification Accepted, 16th Sept., 1887.
the Apparatus Employed therefor.
I, GEORGE HORATIO JONES F.R.S.L. Surgeon Dentist of 57 Great Russell Street
Bloomsbury London, 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:—
My Invention has for its object to impart an irregular formation and arrangement
to artificial teeth thus causing them to approximate so closely in appearance to natural
teeth that when fitted either on the gum or in the dentures they appear so natural as
to be indistinguishable from the natural teeth.
The letters of reference occurring in the following description of my invention refer
to corresponding letters in the accompanying drawings wherein similar letters of
reference indicate corresponding parts.
Fig. 1 shews a plan view of the front plate.
Fig. 2 shews a similar view of the back plate.
Fig. 3 shews a series of artificial teeth made according to my invention and set in a
denture.
Fig. 4 shews a front view of a tooth with a bevel on one side thereof.
Fig. 5 shews a back view of a tooth with side and edge bevels formed thereon.
To carry out my invention I construct a mould in two parts. These parts are
hereafter respectively termed "the front plate" (a) and "the back plate" (b). A
series of irregular cavities (c) of various shape and size and furnished round their
edges with irregular bevels (d) are formed in the face of the front plate so that when
a series of artificial teeth are moulded therein the fronts of such teeth assume various
conformations tallying with those of the different cavities in the front plate while the
front sides and edges of such teeth are bevelled or chamfered off irregularly or have
grooves or curves formed therein or thereon and otherwise correspond in shape to the
various bevels formed round such cavities. Recesses or indentations (e) or their
equivalents are formed in the corners or round the edges of the face of the front plate.
Into these recesses or indentations or their equivalents corresponding studs or pins (f)
formed on the face of the back plate (b) take when the two plates are fitted together

page_text: and serve to keep them in position. A series of cavities (g) are formed in the face of
the back plate corresponding in number with the cavities in the front plate. Such
cavities (g) are of various form and size and are each surrounded at the edge with
irregular raised bevels (h). These cavities serve to shape the backs of the artificial
teeth to the required form when being moulded therein while the raised bevels round
the edges of such cavities shape the back edges of the teeth into various irregular
forms all of which assimilate more or less to the various shapes assumed by natural
teeth.
When the artificial teeth have been so made I fit one or more of them in a denture
or on the gum as required and when fitting them I select and arrange them in such a
manner that they overlap or interlock and fit in either before or behind each other or
upon or between the natural teeth (as shewn in Fig. 3) so that when so fitted the
artificial teeth are not discernible or noticeable from the natural teeth.
One advantage of my invention is that it enables artificial teeth to be fitted without
the aid of wires springs, clasps or other similar fastenings or contrivances.
Another advantage is that my improved artificial teeth are particularly adapted to
crown bridge and bar work as when fitted they possess greater firmness and strength
than those made and fitted in the ordinary way.
Having now particularly described and ascertained the nature of my said invention
and in what manner the same is to be performed I declare that what I claim is.
1. A mould consisting of front plate (a) and back plate (b) the front plate being
provided with irregularly shaped cavities (c) having irregular bevels (d) or their
equivalents and recesses (e) or their equivalents and the back plate having studs or
pins (f) irregular cavities (9) and irregular raised bevels (h) all substantially as set
forth and shewn at Figs. 1 and 2 of the accompanying drawings.
2. Forming artificial teeth with multiform bevelled edges or sides both on the front
and back substantially as set forth and shewn at Figs. 4 and 5 of the accompanying
drawings.