Improvements in Crowning Teeth.
Year: 1896

page_text: Improvements in Crowning Teeth.
I, FREDERICK WHIT GOULD, L.D.S., London, Surgeon Dentist, of Craven House,
Northumberland Avenue, W.C., do hereby declare the nature of this invention
to be as follows:-
This invention relates to improvements in crowning decayed teeth, and has for
its object to provide a simple device by which the crown may be secured more
permanently to the teeth.
This invention relates especially to what is known as crown work in which the
tooth is completely covered by a casing of gold, or other suitable material shaped
to the form of the tooth. The hollow part of the tooth is filled with suitable
cement, which is soft when inserted but afterwards hardens and the outer casing
or crown is held in position by this material. To render the fixing more secure
propose to provide at the inside of the crown a small hook soldered or otherwise
fixed to the crown and projecting into the hollow of the tooth. This hook engages
in the cement placed in the hollow tooth and thus serves to firmly fix the crown.
The Look may be of any suitable shape and may consist of a small pin simply
vent at its end, or of a spiral. The hook may also be made double, having engag
ing points at each side.
Dated this 4th day of November. 1896.
GEO. H. RAYNER,
37, Chancery Lane, London, Agent for the Applicant.
Teeth.
I, FREDERICK WHIT GOULD, L.D.S., London, Surgeon Dentist, of Craven House,
Northumberland Avenue, W.C., 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:-
This invention relates to improvements in crowning decayed teeth, and has for
its object to provide a simple device by which the crown may be secured more
permanently to the teeth.
This invention relates especially to what is known as crown work in which the
tooth is completely covered by a casing of gold, or other suitable material shaped
to the form of the tooth. The hollow part of the tooth is filled with suitable
cement which is soft when inserted but afterwards hardens and the outer casing
or crown is held in position by this material. To render the fixing more secure I
propose to provide at the inside of the crown a small hook attachment soldered or
[Price 8d.]

page_text: otherwise fixed to the crown and projecting into the hollow of the tooth. This
hook attachment engages in the cement placed in the hollow tooth and thus serves
to firmly fix the crown.
The attachment may be of any suitable shape, and may consist simply of a small
pin bent at its end, or of a spiral or any other shape adapted to the cavity of the
tooth. The hook attachment may also be made double having engaging points at
each side.
In order that the invention may be more clearly understood reference is had to
the accompanying sheet of drawings in which Fig. 1 is a cross section of a crown
according to my invention showing the attachment in the process of fitting. Fig. 2
shows a tooth fitted with an improved crown and Figs. 3 and 4 show teeth fitted
with the modifications..
As shown in Figs. 1 and 2 the crown A is provided with the hook B at the inner
side, this hook projecting for a suitable distance from the surface of the crown and
into the hole of the tooth C. The hook engages in the cement D which is placed
within the tooth and fixes the crown to the cement.
The attachment is. fitted by passing the end of the stem through the top of the
crown, the small washer being placed over the stem and pressed down on the
crown and then soldered in place. The projecting part of the stem is then cut
away or filed down. The washer or ring enables the length of the attachment to.
be easily adjusted. The ring can also be removed and replaced if found
desirable.
As shown in Fig. 3 the hook B is of double form having engaging points at
each side and according to Fig. 4 instead of a simple hook a small spiral projec-
tion. B is employed the method of fixing being the same in each case but the
various forms suited to different teeth. Many other forms of attachment may bel
employed serving the same purpose.
Having now particularly described and ascertained the nature of my said in-
vention and in what manner the same is to be performed, I declare that what I
claim is:-
(1) Improvements in crowning teeth consisting in a hook attachment or exten-
sion at the inner side of the crown engaging in the cement placed in the tooth
substantially as and for the purposes specified.
(2) An improved crown for decayed teeth provided with a hook attachment at
its inner side engaging in the cement substantially as described and shown in
Figs. 1 and 2 and for the purposes specified:
(3) The improved crown for decayed teeth having a double hook attachment
at its inner side engaging in the cement substantially as described and shown in
Fig. 3 and for the purposes specified.
(4) The improved crown for decayed teeth having a spiral extension at its inner
side engaging in the cement substantially as described and shown in Fig. 4 and
for the purposes specified.
TL 441 do 1907
GEO. H., RAYNER,.
37, Chancery Lane, London, Agent for the Applicant..