Improvements in and connected with Dental Plates for Artificial Teeth.
Year: 1898

page_text: Date of Application, 25th Feb., 1898
Complete Specification Left, 23rd Nov., 1898-Accepted, 28th Jan., 1899
PROVISIONAL SPECIFICATION.
Improvements in and connected with Dental Plates for Artificial
Teeth.
I, MARY CLARKE JENKINS, of 16, Minard Road, Crossmyloof, Glasgow, North
Britain, Widow of Independent Means, do hereby declare the nature of this inven-
tion to be as follows:
This invention which relates to dental plates for artificial teeth has special refer-
ence to the denture plate of the lower gums and consists in provision and means
of effectually preventing the plate from rising or being displaced during the act of
articulation, mastication or otherwise.
In carrying the invention into practice I cut from a piece of sheet india rubber
or caoutchouc of good quality a shape or blank approximating to the shape of
the plate as seen in inverted plan. I then cement or otherwise secure to the hollow
surface of the plate coming in contact with the gums the said blank or liner which
constitutes a vacuum former of extended suctional area.
To enable the liner to have a more tenacious hold to the vulcanite, I scratch,
abrase, or otherwise slightly roughen that part of the surface which has to receive
it.
In moulding the vulcanite denture from the cast taken of the gums it should
be understood that provision is to be made of enlarging the cavity or surface
which is to receive the liner in proportion to its thickness in order to obtain perfect
fit and adaptation of the parts.
When suction discs are used in combination with the said suction liner these
should be placed preferably at the extremities, and in preparing the blank holes
or cut outs are to be formed at the points where the said suction discs are to be
secured to the plate.
MARY CLARKE JENKINS,
Applicant.
COMPLETE SPECIFICATION.
Improvements in and connected with Dental Plates for Artificial
Teeth.
I, MARY CLARKE JENKINS, of 16, Minard Road, Crossmyloof, Glasgow, North
Britain, Widow of Independent Means, do hereby declare the nature of this inven-
tion and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement:-
This invention which relates to dental plates for artificial tanth hee onani

page_text: ence to the denture plate of the lower gums and consists in provision and means
of effectually preventing the plate from rising or being displaced during the act of
articulation, mastication or otherwise.
In carrying the invention into practice I cut from a piece of sheet india-rubber
or caoutchouc of good quality a shape or blank approximating to the shape of
the plate as seen in inverted plan. I then cement or otherwise secure to the hollow
surface of the plate coming in contact with the gums the said blank or liner which
constitutes a vacuum former of extended suctional area.
To enable the liner to have a more tenacious hold to the vulcanite, I scratch,
abrase, or otherwise slightly roughen that part of the surface which has to receive
it.
In moulding the vulcanite denture from the cast taken: of the gums it should
be understood that provision is to be made of enlarging the cavity or surface
which is to receive the liner in proportion to its thickness in order to obtain perfect
fit, and adaptation of the parts.
In order that my invention may be properly understood and readily carried into
effect, I have hereunto appended one explanatory sheet of drawings in the several
figures of which corresponding parts are marked with the same letters of reference.
Figure 1 is a plan of a suction liner made in accordance with and constituting
my invention.
Figure 2, is a front edge view of the same.
Figure 3, represents the suction liner applied to a denture plate of the lower
gums which is shown in inverted view.
Figure 4, is a modified form of suction liner embodying my invention, and
Figure 5, is a longitudinal section taken on the lines a, b, Figure 4.
The liner illustrated in Figure 1, is cut to the shape shown from a sheet of
rubber and has on its underside a smooth or approximately smooth surface but
may be conveniently corrugated or otherwise roughened.
The liner A, and denture B, which are intended to be attached together have
their contact surfaces slightly scratched or abrased so that they may have more
intimate adhesion of parts which is obtained by a thin coating or coatings of
solution or cement; or the attachment may be made by metal screws whose heads
would form washers, the screws entering suitable sockets embedded in the denture
plate.
Referring to Figures 4, and 5, the liner A, there shown is made from the mould
and is formed with a slight circumferential lip or rim C, in order to provide a
better means of vacuum former, which it indeed is.
Within this suction space or area I provide a number of circular projections or
concentric rings D, disposed in the direction of the length of the liner, which also
fulfil the ends of vacuum formers. Although my improved liner A, is shown
applied to a complete denture plate it is to be understood it is also applicable to
part sets.
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
In denture plates of artificial teeth for the lower gums a liner secured to the
said denture plate on the under-side composed of india-rubber or caoutchouc and
constructed and operating substantially in the manner as and for the purposes
herein before described and shown on the accompanying sheet of drawings.
Dated this 22nd day of November 1898.
JOSEPH HENRY PEARSON,
Applicant's Agent.