IMPROVEMENTS IN ARTIFICIAL TEETH
Year: 1885

page_text: DIECIFICATION.
"
I, SYDNEY PITT of Sutton in the County of Surrey, Gentleman do hereby
declare the nature of my invention for "IMPROVEMENTS IN ARTIFICIAL TEETH
(A Communication to me from abroad by Eli Thompson Starr of the City and
County of Philadelphia, in the State of Pennsylvania one of the United States
of America) and in what manner the same is to be performed to be particularly
described and ascertained in and by the following statement:-
My Invention relates to artificial teeth for use in connection with the usual
plates of hard rubber celluloid etc, used in the manufacture of artificial dentures.
As the manipulation and vulcanization of rubber in the manufacture of artificial
dentures is well understood, and likewise the manufacture of artificial plates from
celluloid is well understood by dentists, I will confine myself to a description of
the improved artificial tooth for use with such materials, and any other suitable
material, for the making of artificial plates to be fitted to the mouth and carry the
artificial teeth.
My Invention consists of an artificial tooth A having an enlarged recess a, at its
base or cervical end, for the reception of the material of the dental base or plate B
to which the tooth is to be secured for use in the mouth. This recess or chamber
at the base or cervical portion of the tooth is preferably but not necessarily under-
cut, or enlarged at its inner termination, so that when the material fills this recess,
and is then vulcanized or otherwise hardened, the tooth will be very securely and
durably fastened to the plate.
In addition to the basal recess or chamber a, the artificial tooth is provided with
a headed pin b, one end of which is baked into the body of the tooth in the process
of manufacture-the tooth being preferably made of porcelain, a material com-
monly employed in the art of making artificial teeth-and said pin is preferably
located centrally in the recess in the base of the tooth, and terminates within said.
recess, so as not to project beyond the base of the tooth.
In the accompanying drawings
Figure 1 is a plan view of an artificial dental plate carrying artificial teeth of my
improved construction, and
Figure 2 is a front or labial view of opposing artificial dentures having artificial
teeth of like character: that is, with teeth having my improvements.

page_text: Figure 3 is a side view, a longitudinal section, and a basal or inverted plan view
respectively, of an incisor tooth constructed according to my improvements; and
Figure 4 shows similar views of a bicuspid tooth of like construction.
Before stating what I claim herein, I would add that my improved artificial
teeth are preferably provided with an external groove or depression c, at the base
or cervical walls thereof, for the better engagement of the hard rubber or other
material employed in making up the plate of the artificial denture.
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
An artificial tooth or tooth crown having an enlarged basal opening or recess
and provided with a headed pin baked into the tooth and projecting into said
opening or recess preferably centrally, substantially as described.
Dated this 7th day of April 1885.
CARPMAEL & Co.,
Agents for the Applicant.
CARPMAEL & Co.,
Agents for the Applicant.