U.S. patent number 3,871,370 [Application Number 05/376,558] was granted by the patent office on 1975-03-18 for tongue-thrust correction appliance.
Invention is credited to Lee E. McDonald.
United States Patent |
3,871,370 |
McDonald |
March 18, 1975 |
Tongue-thrust correction appliance
Abstract
A tongue-thrust correction appliance positionable in a patient's
mouth is provided having an upper-jaw engaging structure including
two laterally spaced elements, and a shelf-like plate which is
integrally molded with the laterally spaced elements for suspension
across the interior of the mouth in spaced relationship to the roof
of the mouth. Each of the laterally spaced elements are provided
with surface conformations enhancing retentive engagement with the
jaw and maintenance of the plate in suspended relationship for
support of the endmost portion of the tongue on an upper surface of
the plate and restricting movement of the tongue to a predetermined
position against the roof of the mouth during swallowing.
Inventors: |
McDonald; Lee E. (Columbus,
OH) |
Family
ID: |
23485492 |
Appl.
No.: |
05/376,558 |
Filed: |
July 5, 1973 |
Current U.S.
Class: |
128/860;
128/861 |
Current CPC
Class: |
A61C
7/08 (20130101) |
Current International
Class: |
A61C
7/00 (20060101); A61C 7/08 (20060101); A61c
011/00 () |
Field of
Search: |
;128/136,132R,133,139
;32/14B-14F |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Gaudet; Richard A.
Assistant Examiner: Recla; Henry J.
Attorney, Agent or Firm: Mahoney, Miller & Stebens
Claims
Having thus described the invention, What is claimed is:
1. A tongue-thrust correction appliance comprising a body of molded
material having at least two laterally spaced elements, each
element therof having an upper surface conformation of elongated,
channel-form adapted to interfit with corresponding upper jaw
portions in retained relationship therewith and a lower surface
adapted to be contactingly engaged by lower jaw teeth, and an
integrally formed, thin web extending transversely between said
spaced elements, said web having an upper surface which is
vertically disposed relative to said spaced elements to be in
vertically spaced relationship to the roof of the mouth when the
appliance is positioned therein and a transverse rear edge which
termiantes no further rearwardly relative to said spaced elements
than a line extending transversely thereacross at a point
coincident with the position of the second bicuspid teeth when the
appliance is positioned in the mouth whereby the tongue may be
positioned in overlying relationship to the upper surface of said
web.
2. a tongue-thrust correction appliance according to claim 1
wherein said web is formed with a lower surface thereof in
contiguous relationship with the lower surface of said spaced
elements.
3. Aa tongue-thrust correction appliance according to claim 1
wherein said body is U-shaped including said spaced elements and a
front portion integrally connecting said spaced elements.
4. A tongue-thrust correction appliance according to claim 3
wherein said web is integrally formed with said front portion.
5. A tongue-thrust correction applance according to claim 3 wherein
said front portion has a channel-form, upper surface conformation
to interfit with a corresponding upper jaw portion.
6. A tongue-thrust correction appliance according to claim 5
wherein said front portion has a lower surface contiguous with the
lower surfaces of said spaced elements and said web.
Description
BACKGROUND OF THE INVENTION
A serious dental problem is created by many people as a consequence
of incorrect swallowing techniques. Incorrect swallowing techniques
with respect to the problem sought to be corrected is that
resulting from "tongue thrust." Tongue thrust is a term used to
describe an incorrect swallowing pattern which causes anterior,
unilateral and bilateral open bites where the teeth between the
arches are forced apart by the tongue projecting between the upper
and lower teeth. This incorrect swallowing pattern may be generally
characterized as an involuntary forward projection of the tongue
whereby the forward tip or end portion of the tongue is caused to
extend between or against the teeth with substantial force. The
resultant undesirable effect is that the tongue tends to either
push the teeth apart, or keep them from erupting to a normal
extent, thereby producing this open bite condition.
While it would appear that "tongue thrust" is only an intermittent
condition of very short duration and therefore not of any
substantial consequence, it will be recognized that swallowing is a
relatively involuntary action, although controllable, which occurs
a great number of times each day. It has been estimated that an
individual swallows approximately 2,000 times each day at a rate of
twice each minute while awake and once each minute while asleep.
The cumulative effect is thus substantial, and tongue thrust does
result in the problem of open bite.
This tongue thrust problem is most serious and most commonly
encountered in children involuntary actions, such as swallowing,
are easily and inadvertently developed during their habit formative
years. Where the problem is recognized at an early age, treatment
has primarily comprised therapy attempting to alter or modify the
pre-existing swallowing pattern to a normal pattern. In a normal
swallowing pattern, the tongue tip should be extended against the
palate and not touching the teeth although in relatively close
proximity. The therapeutic procedure heretofore utilized has
comprised training exercise intended to affect control of the
tongue movement. These training exercises are of repetitive short
duration and have been effective in some cases. Therapeutic
exercises of this nature are more effective in older patients but
are relatively ineffective in young children when the correction is
most imperative.
SUMMARY OF THE INVENTION
The objective of the tongue-thrust correction appliance provided by
this invention is to eliminate and restrict the involuntary and
incorrect swallowing technique in younger dental patients but is
equally useful and adaptable to older individuals. The appliance is
designed to be interfitted in fixed relationship to the patient's
upper jaw and is constructed to direct the tongue during swallowing
to follow a preferred and desired pattern. In a preferred
swallowing pattern, the tongue is normally caused to extend and
press against the palate or roof of the mouth but not in engagement
with the teeth. The palate counteracts the tongue thrust force that
is normally applied, and that force application then has no effect
on the teeth. Accordingly, this appliance is constructed to
maintain the tongue in association with or directed toward the roof
of the mouth during swallowing and thereby prevents extension
against the teeth.
The structure of the appliance of this invention accordingly
comprises a body structure that is engageable with the upper jaw
and is retained in position relative thereto. Incorporated in the
body structure is a shelf-like member that extends across the mouth
cavity and supports the tongue at its extreme endmost portion
during a swallowing operation. The function of this shelf-like
projection is to prevent direct forward projection of the tongue
and results in an upward deflection of the tongue toward the roof
of the mouth in the preferred pattern. This function of the
appliance thus reduces the effect that is encountered with
incorrect swallowing techniques and also is particularly helpful in
altering a patient's reflexive, involuntary swallowing action to a
more correct pattern. It enables the patient to place the tongue
tip in the correct position for swallowing and, with the tongue
thus held in the correct position, the patient is better able to
correct his tongue thrust habit than is possible with therapeutic
exercises unaided by this appliance.
These and other objects and advantages of this invention will be
readily apparent from the following detailed description of an
embodiment thereof and the accompanying drawings.
DESCRIPTION OF THE DRAWING FIGURES
FIG. 1 is a perspective view of a tongue-thrust correction
appliance embodying this invention.
FIG. 2 is a tip plan view on an enlarged scale of the device. FIG.
3 is a bottom plan view on an enlarged scale of the device.
FIG. 4 is an elevational view of the device as seen along line 4--4
of FIG. 2.
FIG. 5 is a medial vertical sectional view taken along a
longitudinal vertical plane with the device inserted in a patient's
mouth.
FIG. 6 is a diagrammatic medial sectional view of an orthodontic
model illustrating an incorrect swallowing pattern.
DETAILED DESCRIPTION OF THE ILLUSTRATIVE EMBODIMENT
A tongue-thrust correction appliance embodying this invention is
shown perspectively in FIG. 1. As shown in FIG. 1, the appliance is
seen to comprise a molded body 10, having the general appearance of
a mouth guard. The body itself may be readily fabricated and
constructed utilizing well known conventional orthodontic
techniques wherein a cast is made of the patient's mouth, and the
appliance or device is then reproduced in a suitable rubber-like
material utilizing the cast. This fabrication technique results in
the desired individual conformation of the appliance for proper and
correct fit.
Referring specifically to the several views of the appliance, it
will be seen that the illustrative embodiment of the appliance has
an arcuate, generally U-shaped configuration. The molded body 10 is
designed to engage the front and immediately adjacent lateral teeth
with a total of eight teeth so engaged. In addition to being
configured for close interengagement with the teeth, the cavities
11 formed in the upper portion of the molded body may be a depth to
extend into close conformity with immediately adjacent portions of
the jaw. While the upper surface of the molded body has the several
cavities 11 formed therein for engagement with the teeth, it will
be seen in FIG. 3 that the lower surface 10a is substantially
smooth to avoid interference with the teeth of the lower jaw. When
applied to a patient's mouth, the device will thus be seen to be
engageable only with the upper jaw with the wall section 13 of the
body at the tooth line kept at a minimum to avoid maintaining the
jaws in an uncomfortably open position. In this manner the device
is relatively non-interfering with normal jaw movements for
functions such as swallowing of liquids. Also, the illustrative
embodiment is shown as being U-shaped with each of the legs or arms
12 extending rearwardly to engage two lateral teeth at each side of
the six front teeth. It will be readily apparent that the length of
the body and the number of teeth engaged is determined by each
patient's particular condition, but limitation of the legs 12 to
the minimum necessary for proper retention further reduces the
possibility of the appliance from interfering with normal jaw
positioning or functioning.
Formed integrally with the molded body is a shelflike web 14 that
is joined with and extends between portions of the legs or arms 12.
The web 14 is also joined with the forward portion of the U-shaped
body. While the legs or arms of the U-shaped body, as well as the
forward portion, have a substantial vertical dimension to encase
and engage the respective teeth and associated adjacent portions of
the jaw, the web 14 comprises a relatively thin structure that is
substantially contiguous with the lower surface 10a of the molded
body 10 and having an upper surface 15. With this construction, a
recess is thus formed which is defined by vertical side walls 16 of
the legs 12 as well as an upper surface 15 of the web 14.
Utilization and functioning of this tongue-thrust correction
appliance is diagrammatically illustrated in FIG. 5. In that
figure, an appliance 10 embodying this invention is positioned in
operative relationship to a patient's mouth structure. In this
medial longitudinal sectional view the upper and lower teeth at the
center of the mouth are designated by the numerals 20 and 21.
Additional teeth are seen with respect to the lower jaw while the
view of additional teeth in the upper jaw is substantially blocked
by the presence of the patient's tongue indicated by the numeral
22. In this illustration, the patient's mouth is closed in a
substantially normal position with only the relatively thin, bottom
wall section 13 of the molded body 10, causing at the most, only a
slight and inconsequential distortion of the normal, closed mouth
configuration. The teeth 20 and 21, as between the upper and lower
jaws, may thus be separated to a slightly greater extent than is
normally encountered at the forward portion of the mouth. This does
not affect or otherwise hinder the usefulness of this orthodontic
appliance. Molding of the appliance to be closely conforming to
tooth and jaw configuration results in retention of the appliance
in relationship to the upper jaw thereby permitting the patient to
move the lower jaw without disturbance of the appliance. This
permits substantially normal lower jaw movement to enable the
patient to readily utilize the appliance in correction of his
swallowing pattern.
The tongue 22 is shown in full lines in a normal or relaxed
position with the jaws closed. In this position, the extreme
forward portion of the tongue is disposed above the web 14, and the
teeth 21 of the lower jaw are in contacting engagement with the
lower surface 10a of the body. The vertical elevation of the web
relative to the patient's mouth does not normally interfere with
nor is it abrasive to the tongue when so relaxed. Swallowing causes
the tongue to involuntarily reflex as a consequence of muscle
movement to arch upwardly and into engagement with the roof of the
mouth indicated at 23 when the tongue tip is positioned on the
upper surface 15 of the web 14. This flexed configuration of the
tongue is indicated by broken lines and designated by the numeral
22a. In the case of a patient exhibiting the characteristic of
improper swallowing technique, the tongue would not assume this
broken line position but would attempt to project directly forward
and exert a displacing force against the upper front teeth. This
improper tongue thrust is diagrammatically shown in FIG. 6.
Utilization of the tongue thrust correction appliance of this
invention greatly assists a patient in correction of an improper
swallowing pattern in that the tongue is directed upwardly against
the roof of the mouth by the web 14. The functioning of the web 14
is to direct the tongue in an upwardly directed arched
configuration to more closely conform to the desired swallowing
pattern. Thus, the thrust force exerted by the tongue is not
directed forwardly to project the tongue between and against the
teeth but, is transformed to a vertical force that is easily and
readily resisted by the palate.
Utilization of this appliance will be in conjunction with a
therapeutic exercise program to achieve the desired result of
correcting an improper tongue-thrust habit. Accordingly, it is
contemplated that the appliance will only be inserted and
maintained in the mouth for predetermined periods of time. For
example, a patient may utilize the appliance for 10-15 minute time
periods, one or more such periods during the course of a day as may
be convenient. During a period of utilization, the patient
consciously places the tongue tip on the web 14 and then swallows
to cause the tongue to extend and forcibly project against the
palate. The tongue will be induced to thrust against the palate
since the tongue tip is supported on the shelf-like web 14 and is
restrained against strictly forward movement between the teeth.
Drinking of liquids assists in inducing swallowing to increase the
number of swallows that can occur during any time period. This
procedure is continued over a period of time and results in
correcting of the swallowing pattern.
It will be readily apparent that the appliance of this invention
provides a novel means for directing or assisting in directing the
tongue force in a correct manner during swallowing. The device does
not interfere with normal jaw functions and may be readily
utilized. It is conveniently removable at anytime but may be
maintained in the mouth for extended periods of time for most
effective performance.
it will be recognized that this appliance is most advantageously
utilized in early stages of tooth and mouth development. The reason
for such early utilization is that it is easier to correct the
problem at that time than to, at a subsequent date, have to
initially correct tooth formation or concurrently correct tooth
formation while utilizing the appliance.
While the device is illustrated as comprising a continuous U-shaped
molded body 10, it will be apparent that mouth configurations as
between several patients may require modification of this basic
structure. For example, it is contemplated that the structure may
comprise only the side arms or legs with the web being
interconnected therebetween. This would be a particularly useful
configuration where other orthodontic techniques are being employed
in correction of front tooth formations.
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