Improvements relating to Artificial Teeth.
Year: 1897

page_text: PROVISIONAL SPECIFICATION.
Improvements relating to Artificial Teeth.
We, LAWRENCE READ, Chairman of The Dental Manufacturing Company
Limited, of 6, Lexington Street, London, W., and JOHN DOUGLAS LOGAN, Dentist,
of 18, Bennetts Hill, Birmingham, do hereby declare. the nature of this inven-
tion to be as follows:-
Our improvements relate especially to those methods of fitting artificial teeth
which are known respectively as crown and bridge work.
In such work we make use of the ordinary porcelain teeth which are provided
each with two projecting pins as a means for attaching them to the plate or support.
We attach to the tooth by means of the pins a dovetail or T form fitting of gold
or other metal running longitudinally at the back of the tooth from top to bottom
and we provide a corresponding part with a dovetail or like groove in it and this
we fix by soldering to the crown or to the bridge as the case may be. Or the dove-
tail or fitting may be fixed upon the crown or bridge and the part with the cor-
responding groove may be attached to the tooth by means of the pins.
•
These arrangements are also applicable to vulcanite and plate work.
LAWRENCE READ.
J. DOUGLAS LOGAN.
Improvements relating to Artificial Teeth.
We, LAWRENCE READ, Chairman of The Dental Manufacturing Company
Limited, of 6, Lexington Street, London, W., and Join DOUGLAS LOGAN, Dentist,
of 18, Bennetts Hill, Birmingham, 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:-
Our improvements relate especially to those methods of fitting artificial teeth
which are known respectively as crown and bridge work.
In such work we make use of the ordinary porcelain teeth which are provided
each with two projecting pins as a means for attaching them to the plate or support.
We attach to the tooth by means of the pins a dovetail or T form fitting of gold
or other metal running longitudinally at the back of the tooth from top to bottom
and we provide a corresponding part with a dovetail or like groove in it and this
we fix by soldering to the crown or to the bridge as the case may be. Or the dove-
tail or fitting may be fixed upon the crown or bridge and the part with the cor-
responding groove may be attached to the tooth by means of the pins.

page_text: These arrangements are also applicable to vulcanite and plate work.
The annexed drawings illustrate our invention.
Figure 1 shows the tooth with its setting, as it is when in place. a is the root
supposed to be firm in the head of the patient. b is a crown of gold, having a
stem 61; this crown is applied to the root and fixed to it in the usual manner.
the tooth which is fitted to the crown. The front face of the tooth is seen in the
drawing.
c is
Figure 2 is a section on the line 2, 2, in Figure 1. c¹ care the platinum pins
with which as is usual the tooth is provided on its rear face. d is a dovetail of
gold or other metal which is fixed to the tooth by the aid of the pins c¹ c¹ being
soldered to the pins or otherwise fixed to them.
which is secured to the crown b by soldering.
e is a piece of gold or other metal
Figure 3 shows the parts represented in Figure 1, partially separated the one
from the other.
Figure 4 shows the rear face of the tooth c with the dovetail & fixed to it.
⚫ Figures 5 and 6 show front elevation and section respectively of the dovetail d.
Figure 7 shows the front elevation of the crown b with the metal picce e in which
is the dovetail groove soldered to it.
Figures 8 and 9 show front elevation and section respectively of the piece e.
In the case of bridge work, plate work and vulcanite all the arrangements are
similar except that the part e is fixed upon the bridge piece or other foundation
in place of upon a crown b.
It is obvious as before stated that the arrangement may be reversed, that is to
say, the part & attached to the tooth may be the female dovetail whilst the male
dovetail is upon the part e. Nevertheless the arrangement shown is preferred.
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:
The combination of the tooth having pins c¹ with the dovetail & and the piece c
provided with the dovetail, substantially as described.
Dated this 3rd day of February 1898.
LAWRENCE READ.
JOHN DOUGLAS LOGAN.