Improvements relating to Artificial Teeth.
Year: 1898

page_text: Date of Application, 15th Nov., 1888
Complete Specification Left, 24th Nov., 1898-Accepted, 28th Jan.,
188.9
Improvements relating to Artificial Teeth.
I, AUGUST WIENAND, of Bush Lane House, Cannon Street, London, E.C.,
Manufacturer, do hereby declare the nature of this invention to be as follows:-
It has heretofore been customary to fusten artificial teeth by means of platinum
pins which are embedded in the teeth during the moulding or by means of
platinum tubes into which the pins are soldered after the firing. By reason
of the material used these methods of fastening the pins are very expensive and
the latter method moreover presents great inconveniences.
According to my invention I fasten the pins, which are made of any suitable
metal other than platinum, with the aid of platinum caps inserted during the
moulding into cavities formed in the material of the tooth. To these caps the
pins are secured by solder or otherwise, and the intermediate spaces between
the pins and the inner peripheries of the cavities are filled up with enamel.
cement or other suitable material, preferably having the same colour as the
material of the tooth.
The aforesaid caps may be provided with lugs, bands or projections which
extend either through a portion or the whole length of the said cavities.
It will be evident that in the case of a small cap, which constitutes as it were
the head of the pin and precludes the liability of the pin breaking out of the
tooth, the solder will be properly distributed over the entire inner periphery of
the cap, and thus afford a better hold than is possible with a tube, such hold
being further increased by the enamel or other filling material.
DL 1511.
1000
J. LINCOLN & Co.,
75, Chancery Lane, London, W.C.,
Agents for the Applicant.
I, AUGUST WIENAND, of Bush Lane House, Cannon Street, London, E.C.,
Manufacturer, 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:-
It has heretofore been customary to fasten artificial teeth by means of platinum
pins which are embedded in the material forming the teeth during the moulding,
or by means of platinunf tubes having open ends, which are likewise embedded
5 in the material during the moulding, and into which the pins of other metal
ara soldered after the fring.

page_text: By reason of the great amount of platinum used these two methods of fixing
the pins in the teeth are very expensive. The tubes surrounding the pins
weaken the teeth and increase the amount of metal contained therein. As their
inner ends are open the teeth are liable to be cracked on soldering the pins into
the tubes through the solder coming in contact with the material forming the
teetli.
According to my said invention, which is designed to obviate these drawbacks,
I fasten the pins, which are made of any suitable metal other than platinum, to
platinum cap embedded in the teeth.
Referring to the accompanying drawing,
Figure represents an enlarged section of a tooth, illustrating my improved
method of fastening the pins.
Figures 2 and 3 are similar sections showing modifications thereof.
Figures 1, 2 and 3 are sections of the caps shown to a larger scale.
In carrying my invention into practice I embed platinum caps a in the
material of the teeth 6 during the moulding of the same, such caps occupying
the inner extremity of cavities formed in the back of the teeth, Figures 1, 2
and 3. The caps a are preferably bulged at their circumference which bears
against a shoulder in the cavities, thereby enabling them to be securely retained
therein. In the arrangement illustrated in Figure 1 use is made of a simple
cap, shown to a larger scale in Figure 1, whilst in the modification Figure 2
the cap is furnished with curved lugs a¹, Figure 2, and in the modification
Figure 3 it is provided with straight lugs a³, Figure 3. These lugs may extend
either through a portion or the whole length of the said cavities.
After the teeth have been fired the pins e consisting of cheaper metal than
platinum are introduced into the said cavities and fastened to the platinum
caps a by solder or the like which, owing to the shape of the caps, will be
equally distributed over the whole extent of the surfaces of contact and thus
form good joints. Between the pins e and the inner peripheries of the said cavities
there remains spaces d which are then filled up with enamel, cement or other
appropriate material adapted to unite with the material of the teeth and profer-
ably having the same colour as the latter.
It is evident that by my improved method, besides remedying the drawbacks
herein before alluded to, I succeed in fixing the pins more securely in the teeth,
because the said caps, constituting as it were the heads of the pins, preclude the
liability of these pins breaking out of the teeth, their hold being further increased
by the enamel or other filling material.
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:
First. Artificial teeth in which caps a made of platinum are embedded in
cavities of the teeth during the moulding to serve for the reception of the pins c
made of inferior metal and soldered to the caps after the firing, the spaces around
the said pins being filled up with enamel, cement or like material d, substantially
as specified.
Second. In artificial teeth the fastening of pins as hereinbefore specified and
shown in the accompanying drawing.
TNT 1900
J. LINCOLN & Co.,
75, Chancery Lane, London, W.C.,
Agents for the Applicant.