U.S. patent number 3,686,759 [Application Number 05/039,034] was granted by the patent office on 1972-08-29 for frame for taking bite impressions.
Invention is credited to Erna Morbor Pross geb. Hogreve.
United States Patent |
3,686,759 |
Pross geb. Hogreve |
August 29, 1972 |
FRAME FOR TAKING BITE IMPRESSIONS
Abstract
A frame for taking bite impressions for making partial teeth
prosthesis, extensions of prosthesis, crowns and bridges and the
like, wherein at least one frame is used which runs parallel to the
row of teeth for receiving bite impressions, and includes a
plurality of retaining elements coupled to the frame for retaining
the material which takes the impressions.
Inventors: |
Pross geb. Hogreve; Erna Morbor
(2901 Sandhatten, DT) |
Family
ID: |
25757414 |
Appl.
No.: |
05/039,034 |
Filed: |
May 20, 1970 |
Foreign Application Priority Data
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May 21, 1969 [DT] |
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P 19 25 932.6 |
Jul 18, 1969 [DT] |
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G 69 28 453.3 |
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Current U.S.
Class: |
433/37 |
Current CPC
Class: |
A61C
9/0006 (20130101); A61C 9/00 (20130101) |
Current International
Class: |
A61C
9/00 (20060101); A61c 009/00 () |
Field of
Search: |
;32/17 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
Primary Examiner: Peshock; Robert
Claims
What is claimed is:
1. A device for taking bite impressions for making partial teeth
prosthesis, extensions of prosthesis, crowns and bridges, and the
like, comprising:
a frame means, curved so as to be substantially parallel to a row
of teeth, for disposal in front of the row of teeth for taking bite
impressions; and
a plurality of elongated bars, detachably coupled to and slidably
moveable in said frame means, and radially extending therefrom,
having a spherical portion affixed to the free ends thereof for
supporting and securing bite impression material to the device.
2. The device as recited in claim 1, wherein said retaining
elements are provided with a T-shaped end opposite the end to which
said spherical element is affixed, and wherein said frame is
provided with a vertically disposed slot extending within the
periphery thereof for slidably receiving said T-shaped end and
thereby permitting said retaining elements to be slidably
positioned along the periphery of said frame means.
3. The device as recited in claim 1, wherein said frame means and
said retaining elements are constructed of plastic.
4. The device as recited in claim 3, wherein said first and second
frame means and said plurality of retaining elements are
constructed of plastic.
5. A device for taking bite impressions for making partial teeth
prosthesis, extensions of prosthesis, crowns and bridges and the
like, comprising:
a first frame means, curved so as to be substantially parallel to a
row of teeth, for disposal in front of the row of teeth for taking
bite impressions;
second frame means, curved so as to be substantially parallel to
said first frame means, for disposal at the distal end of the row
of teeth, said first and second frame means being arranged parallel
to and in one plane with respect to each other;
a plurality of rigid members affixed to and connecting the free
ends of said first and second frame means; and
a plurality of detachable, crescent-shaped retaining members,
detachably affixed at each end to said first and second frame
means, and extending radially therefrom, for supporting and
securing the bite impression material between said first and second
frame means on the device.
6. A device for taking bite impressions for making partial teeth
prosthesis, extension of prosthesis, crowns and bridges, and the
like, comprising;
a first frame means, curved so as to be substantially parallel to a
row of teeth for disposal in front of the row of teeth for taking
bite impressions, and
a plurality of inwardly projecting bar-like elements spaced apart
and detachably coupled to said frame means, said bars approximately
equal in number to the teeth in a row for supporting and securing
bite impressionable material, so that selected ones of said bars
corresponding to remaining teeth in a row are broken away leaving
the remaining inwardly extending bars for supporting the bite
impressionable material.
Description
This invention relates to a frame for taking bite impressions for
producing partial artificial teeth, prosthesis extensions, crowns
and bridges.
When partial teeth prosthesis, extensions of teeth prosthesis,
crowns and bridges are made, it is common practice for the dentist
to take an impression of the upper and lower jaw of the patient by
using an impression tray which is covered with an impression type
material. The impressions are then brought to a technical
laboratory and are filled with hard calcium sulfate in order to
obtain a working model. The bite blocks are prepared by the lab
technician on the working model. The bite blocks consist of a base
plate which is so constructed as to fit the palate of the patient's
mouth and the dorsal side of the lower jaw, respectively. The bite
blocks are covered with a layer of wax. The working models as well
as the bite blocks are returned to the dentist who then takes the
fitting. A correct fitting of the bite block is necessary, in order
to make a good fitting prosthesis, because the fitting of the bite
block defines the position and height between the upper and lower
jaw of the teeth prosthesis. The patient's natural teeth are
imprinted into the wax layer of the bite blocks which are inserted
into the patient's mouth. The bite blocks are removed from the
patient's mouth and are then mounted onto the working models and
brought into occlusion. The working models as well as the bite
blocks are then returned to the technical laboratory. The
technician mounts the working model on the articulator, removes the
bite blocks and sets up the teeth. The finished teeth prosthesis is
then returned to the dentist for fitting in the patient's mouth.
When the teeth are fitted, the dentist can determine whether or not
the bite was taken correctly, and whether the technician has
correctly positioned the working models on the articulator. If the
bite and the positioning in the articulator were done correctly,
the teeth prosthesis should fit perfectly, and only cosmetic
improvements should be necessary, that is, the shape of the
artificial teeth. When on the spot teeth prosthesis are made after
the bite had been taken, the teeth prosthesis are made right away.
Therefore, a test fitting as well as the occlusion, which would
show the correct setup of the teeth prosthesis is eliminated.
However, it is absolutely essential, that the taking of the bite be
perfect in order to obtain a good fitting teeth prosthesis.
The taking of the bite as performed under conventional procedures,
that is, by the use of bite blocks, often leads to errors, in that
incorrect bites are taken from the patient. These errors are the
result of the patient not biting correctly into the bite block.
This happens because the bite block consists of a great deal of
material, a situation which is rather unusual for the patient to
have it in his mouth. Another disadvantage is that the imprint in
the layer of wax is very often incorrect. This occurs due to the
fact that the body heat of the patient melts and softens the wax to
a certain degree, so that the bite imprint is frequently deformed.
Since the imprints on the wax layer are only in the range of
thickness of 1-3 mm, the imprints are often damaged while being
transferred from the dentist's office to the laboratory. If the
imprints are damaged in any way, it is impossible to obtain an
exact and good fitting teeth prosthesis.
Accordingly, the present invention provides an improved device for
the taking of the bite. This is achieved by eliminating the making
of a bite block so as to shorten one step in the making of a teeth
prosthesis. In the invention, at least one frame is provided which
runs parallel in front of the row of teeth. This frame is provided
with retention elements for the imprint material when the bite is
being taken. The frame for taking the bite imprint is advantageous
in that it provides a correct occlusion, which could not be
obtained by the old method in using a bite block. Another advantage
is that the dentist, after taking the bite impression, can
immediately take the bite. This saves the patient another visit to
the dentist's office.
The present method eliminates the making of a bite block. If the
patient needs an upper and lower jaw teeth prosthesis, an
impression would have to be taken from the patient, in order to
produce a working model. Since, with the new method, the bite
impression is filled up only on one side, the remaining opposite
bite impression would serve as the counter model. Since the novel
frame for taking the bite impression is filled up with the
impression material, it is a lot easier for the patient to bite
into it, than into the wax layer of the bite blocks. The dentist
can now send the bite impression frame to the laboratory for making
the working model, and is assured that the bite impression cannot
be damaged, a defect which frequently happens with conventional
bite blocks. The bite impressions show clearly the natural teeth of
the patient in the upper and lower jaw. Furthermore, the gaps of
the missing teeth and the gum line are also clearly shown. The bite
impressions taken with the novel frame, facilitates the exact
occlusion and the technician no longer has any difficulties placing
the working models into the articulator.
In another embodiment of the invention, the frame for taking the
bite impressions has a frame portion which runs in front of the row
of teeth. The retaining elements for the impression material in
this embodiment are arranged as free carrying webs, which can be
easily broken off. The webs may also be arranged in such a manner
in that they are freely movable in the frame.
This embodiment is advantageous in that application of this frame
is extremely simple. The dentist would either break off the webs at
the places where the patient still has his natural teeth, or just
move the webs out of the region of the natural teeth. The remainder
of the webs are then covered with impression material and shown the
correct occlusion, after taking the bite. A further advantage is
that only the gaps between the natural teeth are filled with
impression material and the natural teeth stay free of such
material. The bite frame for taking the bite impressions described
in this embodiment is particularly advantageous for making partial
teeth prosthesis, or extensions of a prosthesis. The webs and the
frame parts may be made and delivered separately to the dentist.
The dentist could then assemble the frame and the webs to the needs
of the individual client.
In a further embodiment of the invention, the bite impression frame
is provided as a crescent shaped frame, that is, it only extends
halfway around the paitient's jaw. Such a crescent shaped frame is
advantageous for taking bite impressions for bridges, and crowns.
Another advantageous feature is that these crescent shaped frames
are made disposable and need not be returned for cleaning.
For better handling of the novel frame, a small handle is provided
in on the frame which facilitates the insertion of the frame into
the mouth of the patient.
It is therefore an object according to the present invention to
provide a frame for taking bite impressions which includes at least
one frame portion and a plurality of retaining elements coupled to
the frame portion for holding the material to receive bite
impressions.
It is another object according to the present invention to provide
a frame for taking bite impressions which eliminates one of the
necessary steps of conventional procedures.
It is still another object according to the present invention to
provide a frame for taking bite impressions which is disposable,
simple in design, easy to manufacture and inexpensive in cost.
Other objects and features of the present invention will become
apparent from the following detailed description considered in
connection with the accompanying drawings which disclose the
embodiments of the invention. It is to be understood, however, that
the drawings are designed for the purpose of illustration only and
not as a definition of the limits of the invention.
In the drawings wherein similar reference characters denote similar
elements throughout the several views:
FIG. 1 is a plane view of the bite impression frame shown with webs
according to the invention,
FIG. 2 shows a second embodiment of the invention and,
FIG. 3 shows a variation of the second embodiment in a
cross-sectional view taken along lines A-B of FIG. 2.
Referring to FIG. 1, there is shown a frame for taking bite
impressions together with webs 6c which are arranged between frame
portions 1 and 2. The webs are preferably slightly arched so that
they can be more easily broken off, if required. Frame portions 1
and 2 are connected by webs 3 disposed on the outer ends of the
frame portions. Frame portions 1 and 2 are preferably arranged in
the same plane. Frame portion 2 runs at the distal end of the tooth
row.
FIG. 2 shows a further advantageous embodiment of the frame without
frame portion 2 which usually would be positioned at the rear of
the row of teeth. In this embodiment, free carrying webs 6 are
provided at frame portion 1, which runs in front of the row of the
teeth, in order to receive the material which takes the bite
impression. To retain the material for taking the bite impression,
strengthening portions 6a are provided at the free ends of webs 6
which engage the material like a barbed hook. At the places where
the patient still has his natural teeth, the dentist just breaks
off the webs which are made of rather brittle material. The same is
true if the dentist uses the frame without second portion 2, but
free carrying webs 6 can be broken off from frame portion 1 at the
places where the patient has still his natural teeth.
In FIG. 3, a variation of the frame is shown in an enlarged
sectional view taken along line A-B of FIG. 2. The difference is
that the webs as shown in FIG. 3 are freely movable in the frame
and the webs 6 are only retained at one portion of the frame. Webs
6 are provided with a T-section 6b at the point where they engage
frame portion 1. A strengthening portion 6a is provided in the same
manner as described with respect to FIG. 2.
While only a few embodiments of the present invention have been
shown and described, it is obvious that many changes and
modifications may be made thereunto without departing from the
spirit and scope of the invention.
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