U.S. patent number 3,762,050 [Application Number 05/249,180] was granted by the patent office on 1973-10-02 for preformed universal orthodontic arch.
Invention is credited to Giorgio Dal Pont.
United States Patent |
3,762,050 |
Dal Pont |
October 2, 1973 |
PREFORMED UNIVERSAL ORTHODONTIC ARCH
Abstract
A preformed orthodontic arch made of a row of minor arches whose
apices extend in the same general direction and that are joined to
each other by arch ends that are common to adjacent minor arches in
the row. Each minor arch end is mounted in a tooth through the
intermediary of a mounting member.
Inventors: |
Dal Pont; Giorgio (Belluno,
IT) |
Family
ID: |
26330118 |
Appl.
No.: |
05/249,180 |
Filed: |
May 1, 1972 |
Foreign Application Priority Data
|
|
|
|
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May 3, 1971 [IT] |
|
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84124 A/71 |
May 15, 1971 [IT] |
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84129 A/71 |
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Current U.S.
Class: |
433/21;
433/20 |
Current CPC
Class: |
A61C
7/28 (20130101); A61C 7/12 (20130101) |
Current International
Class: |
A61C
7/00 (20060101); A61C 7/12 (20060101); A61c
007/00 () |
Field of
Search: |
;32/14A |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Kinsey; Russell R.
Assistant Examiner: Lever; J. Q.
Claims
I claim:
1. A preformed universal orthodontic arch made of a spring-type
material comprising: a row of minor arches having apices that
extend in the same general direction, each minor arch curving from
the opposite sides of its apex in a direction away from said first
mentioned direction to spaced minor arch ends, the adjacent minor
arch ends of adjacent minor arches being common to each other and
joining the adjacent minor arch ends to each other, said joined
minor arch ends being spaced in accordance with the desired spacing
of the teeth in the dental arch; and a mounting member secured to
each of the joined minor arch ends that is adapted to be mounted on
a tooth.
2. The orthodontic arch according to claim 1 wherein the minor
arches are all of the same size.
3. The orthodontic arch according to claim 1 wherein each minor
arch has a height of about 9 mm and a width of about 7 mm to 9
mm.
4. The orthodontic arch according to claim 1 wherein each of said
minor arch ends has at least one looped portion whose apex faces in
the general direction of the minor arch apices and thus in the
general direction of its associated tooth apex.
5. The orthodontic arch according to claim 1 wherein each mounting
member comprises an attachment in which a minor arch end is
inserted; and wherein the arch ends at the outermost extremities of
the row are each formed into a bend that extends about the
attachment end that faces the minor arch apices.
6. The orthodontic arch according to claim 4 wherein each of said
looped portions is located between two other looped portions in its
minor arch end that faces away from the minor arch apices.
7. The orthodontic arch according to claim 4 wherein each of said
minor arch ends is anchor-shaped to form two of said looped
portions at its lateral extremities.
8. The orthodontic arch according to claim 4 wherein each of said
looped portions is bent towards its associated mounting member, and
thus towards its associated tooth anterior, and then is turned to
lie on an axis that is parallel to the plane of the minor arches
and that extends towards the minor arch apices and the apex of its
associated tooth.
9. The orthodontic arch according to claim 6 said first mentioned
looped portion and said other looped portions are of equal
widths.
10. The orthodontic arch according to claim 7 wherein said two
looped portions are of equal widths.
11. The orthodontic arch of claim 1 wherein the orthodontic arch
comprises a molded wirelike element.
12. The orthodontic arch of claim 1 wherein the orthodontic arch is
comprised of orthodontic wire having a diameter between 0.2 mm and
0.7 mm.
13. The orthodontic arch of claim 1 wherein the orthodontic arch is
comprised of metal wire of square cross-section.
14. The orthodontic arch of claim 1 wherein the orthodontic arch is
comprised of metal wire of rectangular cross-section.
15. The orthodontic arch of claim 1 wherein the orthodontic arch is
made from a sheared plate.
16. The orthodontic arch of claim 1 wherein the orthodontic arch is
made from pressed material.
17. The orthodontic arch of claim 1 wherein the orthodontic arch is
made from metal.
18. The orthodontic arch of claim 1 wherein the orthodontic arch is
made from a synthetic plastic material.
19. The orthodontic arch according to claim 1 wherein each mounting
member comprises: at least one tubular member, adapted to lie on an
axis generally parallel to the axis of its associated tooth, in
which its associated minor arch end is engaged.
20. The orthodontic arch according to claim 19 further comprising:
means enabling each tubular member to be cemented to the anterior
surface of its associated tooth.
21. The orthodontic arch according to claim 19 wherein each tubular
member is secured to a band that is adapted to be mounted on its
associated tooth.
22. The orthodontic arch according to claim 19 wherein each
mounting member comprises a pair of said tubular members.
23. The orthodontic arch according to claim 19 wherein at least a
part of said tubular member is flattened to thereby provide
torsion-resistant frictional grip with its associated minor arch
end.
24. The orthodontic arch according to claim 1 wherein each minor
arch end has a cleft therein; and wherein said mounting member
comprises a prong that is received in its associated cleft to
thereby form a clutchlike attachment between each minor arch end
and its associated mounting member.
Description
BACKGROUND OF THE INVENTION
This invention is concerned with a universal orthodontic arch that
improves on the principles of the known orthodontic techniques
using fixed multiband orthodontic appliances.
Orthodontic arches are known that are made of appropriately formed
generally horizontally extending orthodontic wire attached to the
teeth to correct the malposition of the teeth. An attempt to form
this wire with vertical ends that are inserted into tubular members
mounted to the teeth has been abandoned because the rigidity of the
wire made it difficult to insert the ends into the tubular
members.
Orthodontic arches are presently made of wires with various types
of vertical bends, loops, and eyelets that extend away from the
generally horizontal arch wire and are provided with springs and
rubber bands in various combinations that are usually mounted to
the teeth by horizontal brackets.
A great disadvantage of these orthodontic arches lies in the fact
that they often require an individual design and construction
patterned to the patient's teeth which makes their design and
manufacture a difficult procedure that can be practiced only by
skilled operators after long training.
The necessity of the individual construction of the orthodontic
arch based on the actual malposition of the patient's teeth
involves a great waste of time, a low performance accuracy, and an
individual adjustment of the arch to the teeth. Moreover, this
involves the necessity of a model of the patient's dental arch to
construct the orthodontic arch and creates the dangers of
overcorrections and poor oral hygiene due to the presence of the
arch in the spaces between the teeth.
SUMMARY OF THE INVENTION
An object of this invention is to avoid the aforementioned
disadvantages by the use of a preformed universal orthodontic arch
that is simple and versatile and that can be utilized without the
need of specialized training by the operator. The orthodontic
arches of this invention are interchangeable and can, with minimal
adjustments, correct with great consistency and efficiency most
dental malpositions by simultaneous pressures in three planes. The
orthodontic arches of this invention also provide an effective
centrifugal (expansive) or centripetal (contractive) effect on the
patient's dental arch.
A further object of this invention is to provide an orthodontic
arch that, while retaining its universality, incorporates certain
features that are dependent on the type of malformation of the
patient's dental arch or on the type of teeth malposition. These
features include a variable quantity of vertical ends in the
orthodontic arch, a variable distance between the vertical ends, a
variation in the degree of elasticity of the orthodontic arch, the
ability to provide for occlusal or apical insertion, and other
characteristics in other areas.
The orthodontic arch according to this invention is formed of a row
of minor arches whose extremities are joined to each other by arch
ends. Mounting members secured to the minor arch ends are
vertically mounted to the teeth.
Advantageously, the ends of the minor arches are bent to form loops
whose apices extend in the same general direction as the minor arch
apices and thus in the general direction of the associated teeth
apices. The mounting members are arch ends preferably in the form
of attachments in which the minor arch ends are inserted and the
arch ends at the outermost extremities of the row are bent so as to
extend about the attachment ends that face the minor arch apices so
as to prevent the escape of the minor arch ends from the
attachments.
The mounting members, in accordance with this invention, may be in
the form of a band that is mounted to its associated tooth and that
receives its associated arch end.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a schematic representation of two orthodontic arches for
the upper and lower teeth made of orthodontic wire and having
twelve minor arch ends;
FIG. 2 is a perspective view of a portion of the orthodontic wire
of FIG. 1 mounted to an upper tooth by means of a band;
FIG. 3 is a schematic representation of an upper dental arch to
which the upper orthodontic arch of FIG. 1 has been applied so as
to apply a vertical correction to the teeth;
FIG. 4 is a schematic representation in plan showing the mounting
of the orthodontic arch of this invention to a dental arch so as to
apply a torsional correction to the teeth about vertical axes;
FIG. 5a is a partial view of the orthodontic arches of FIG. 4
partially applied to the lower dental arc;
FIG. 5b is a partial view of the orthodontic arches of FIG. 4 fully
applied to a lower dental arch so as to close the space between the
teeth of the dental arch after the extraction of a tooth in the
dental arch;
FIG. 6 is a schematic partial view of the orthodontic arch of FIG.
5 used to correct a mesioinclination (tangential forward
inclination) and a mesialination (tangential forward translation)
of a lower tooth;
FIG. 7 is a schematic representation of the orthodontic arch of
FIGS. 5 and 6 applied to a dental arch to correct the inclination
of its teeth;
FIG. 8 is a view similar to FIG. 1 showing a preferred form of the
orthodontic arches;
FIG. 9 shows a partion of the arch of FIG. 8 applied apically by
means of a double tube to an upper tooth;
FIG. 10 shows the arch of FIG. 8 applied occlusally to an upper
tooth;
FIGS. 11 and 12 show two additional modes of application of the
arch of FIG. 8;
FIGS. 13 and 14 show further variations of orthodontic arches
applied occlusally to upper teeth;
FIG. 15 shows in perspective an orthodontic arch with a rail
attachment for attaching the orthodontic arch wire thereto;
FIG. 16 shows in perspective a clutch arrangement for attaching an
orthodontic arch wire to a band;
FIGS. 17, 18, and 19 show in perspective other orthodontic bands
furnished with attachments for the orthodontic arches shown in
FIGS. 8-14; and
FIG. 20 shows in perspective an orthodontic arch for the upper
dental arch made by shearing a metal plate.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
The universal preformed orthodontic arch 1 for the upper teeth is
constructed with a spring-type (preferably heat treated) wire
having a diameter of from 0.3 mm to 0.6 mm (usually 0.4 mm). This
wire is bent to form a row of similarly facing arches 2 (normally
12 in number and less frequently 14 in number) that are joined by
common ends 3 that extend away from the minor arch apices, the ends
3 being secured to teeth 4. The minor arch ends 3 are spaced in
accordance with the spacing of the teeth in an ideal dental arch,
thus enabling the orthodontic arch to be made in a shape that is
independent of the shape of the dental arch of the patient in which
the orthodontic arch is to be utilized. In practice, for
construction reasons, it is desirable to make the orthodontic
arches (see FIGS. 1 and 8) with the minor arches 2 having uniform
and average dimensions. These dimensions, which are easily
increasable by stretching and easily reducible by pliers, are
normally about 9 mm in height and about 8 mm in width, thus
providing an approximate correspondence between the spacing of the
ends 3 and the ideal arrangement of the teeth in a dental arch.
Therefore, one can always obtain satisfactory results. Moreover, as
set forth above, modifications may easily be made in the
orthodontic arch in accordance with the individual size of the
teeth and the type of malformation of the dental arches.
The orthodontic arches in FIGS. 1 and 8 for the lower dental arch
preferably has minor arches 2' that correspond to the incisor
teeth, narrower than its other minor arches.
For mounting the arch 1 to the teeth 4, bands 5 are mounted on the
anterior faces of the teeth. Fixed to each band 5, in any desired
conventional manner, are attachment members in the form of tubes 6
having flattened sections. The arch 1 is secured to the teeth by
inserting a minor arch end 3 in each of the tubes 6.
Both the upper and lower orthodontic arches have at their outermost
extremities bends 11 that extend inwardly across the ends of their
associated tubes 6 that face the minor arch apices to prevent the
escape of the orthodontic arches from the tubes 6.
By the use of special adhesives, the minor arch ends 3 or the tubes
6 may be cemented directly to the anterior faces of the teeth.
Moreover, other devices may be used for mounting the minor arch
ends to the teeth instead of the bands 5 and the tubes 6, as for
example:
a. the rail-like device of FIG. 15;
b. the clutch-like device of FIG. 16 that includes a prong mounted
to the band that is received in a cleft in the minor arch end;
c. the fully closed double tube device of FIG. 17;
d. the laterally open double tube device of FIG. 18; and
e. the square section device of FIG. 19.
In the functioning of the orthodontic arch, because of the
malposition of one or more of the patient's teeth, there will
obviously be a misalignment between some of the bands 5 and their
tubes 6 and the corresponding ends of the teeth that are to be
inserted into the bands 5. The forced insertion (allowed by the
great elasticity of this orthodontic arch) of this tooth end into
its associated band will create a deformation of the orthodontic
arch that will tend elastically to return to the initial position;
i.e., to that position corresponding to an ideal arrangement of
teeth in the dental arch.
If for example, a tooth 41 of the upper dental arch is higher in
relation to the occlusal plane of the other teeth (FIG. 3), the
elastic reaction of the orthodontic arch (arrow 7) will bring it
down; and conversely, if a tooth 42 is situated lower in relation
to the same occlusal plane, the elastic reaction of the orthodontic
arch will raise it. If a tooth 43 is swung on its vertical axis in
relation to its regular position (FIG. 4), the elastic reaction of
the orthodontic arch to the torsional stress to which the tooth end
is subjected for its forced insertion in the tube will bring the
malpositioned tooth to its regular position.
In the case of a tooth 44 that is horizontally translated in
relation to its regular or desired position (for example, when the
space of a missing tooth has to be closed), the distortion to which
the arch is forced will bring the teeth in a uniform distribution.
In these cases, there will be a convenient two-stage correction. In
a first stage (FIG. 5a) not all the minor arch ends are inserted
into the tubes mounted to the teeth concerned with the correction.
In a second stage (FIG. 5b) after a partial correction is obtained,
the remaining free minor arch ends are inserted into the
corresponding tubes. Obviously, the number of minor arch ends shall
correspond to the number of teeth of the dental arch, taking into
account the completion of the treatment. In the case of a tooth 45
translated and inclined forwardly and closing a space of another
tooth (FIG. 6), the orthodontic arch compelled into a smaller space
in relation to that occupied in its rest position tends to create
the space missing in the dental arch. In the case of inclined teeth
46 and 46' (FIG. 7), the forced insertion of the teeth ends out of
their normal axis brings about a redressment of the teeth.
On account of its great flexibility when made with wires of normal
size (light wires), the orthodontic arch may be used in its flat
form; i.e., without being previously curved on the horizontal
plane. It thus results in an often desired light expansion of the
dental arch. When this has been avoided, the orthodontic arch may
be bent in order to correspond to the shape of the dental arch.
The main advantage of the orthodontic arch of this invention lies
in the fact that it is universal and that it does not have to be
custom built in accordance with the patient's dental arch as with
the traditionally used orthodontic arches.
Further advantages of the orthodontic arch of this invention
are:
simplicity of use even simplifying the orthodontic treatments;
versatility enabling it to be adapted to the correction of
different orthodontic problems with only a simple adoption to the
patient's dental arch size as contrasted with the prior practice of
manufacturing a particular orthodontic arch or molding for the
particular dental malposition or malformation;
the enabling of the correction of one or more teeth at the same
time regardless of their number and their relative position;
the obtaining, when desired, of a complete centrifugal expansion or
centripetal contraction of the dental arch;
the application to a dental arch without previously making
impressions or models of the dental arch;
the ability to immediately substitute a new orthodontic arch in
case an earlier-used orthodontic arch is ruptured, damaged or
distorted as contrasted with the traditional orthodontic arches
which must be custom made and therefore cannot provide for an
identical substitute orthodontic arch;
better oral hygiene due to the orthodontic arch not being located
in the interdental spaces, but running along side the gums;
ease in inserting and removing the orthodontic arch by inserting
the minor arch ends in the tubes, as contrasted with the prior
orthodontic arches that are complicated by metal wiring and other
locking devices; and
the ease of control of the action of the entire orthodontic arch or
one or more of its portions by simply pulling out the minor arch
ends from the teeth.
FIGS. 8-12 show a preferred form of the invention wherein the minor
arch ends are formed by a central loop 8 whose apex faces toward
the minor arch apices and outside loops 9 on each side of the
central loop whose apices face away from the minor arch apices and
are symmetrically disposed with respect to the central loop. The
loops 8 and 9 are all of the same width so that anyone of them may
be inserted into a tube having a size corresponding to the width of
the loops.
For mounting the minor arch ends to the teeth 4 of the patient, the
bands 5 may be provided with a vertical tube 6 having a flattened
section corresponding in size to the minor arch ends and about 3 mm
in height (FIG. 2). Alternatively, the bands 5' may be provided
with two tubes 6' (FIG. 17) or with two laterally open mounting
elements 6" (FIG. 18).
Particular advantages arise with these variants depending on the
number of the loops 8 and 9 that are mounted to the teeth 4 and
depending on the way that the loops are mounted to the teeth. For
example, if a band 5 is used that has only one tube 6, the central
loop 8 (FIG. 10) may be occlusally inserted into the tube (upwardly
in the case of an upper tooth and downwardly in the case of a lower
tooth). This provides for an easier application, particularly with
the back teeth, and an increased elasticity of the orthodontic arch
wire due to the looped portions 9 of the minor arch ends being free
to flex. One can insert one of the outside loops 9 in the tube 6
instead of the central loop 8 (FIGS. 11 and 12), thus varying the
corrective force of the orthodontic arch wire at that point.
If a band 5' with two vertical tubes 6' is used, both outer loops 9
may be inserted so that their apices extend away from the minor
arch apices (downwardly for the upper teeth and upwardly for the
lowerteeth), thus increasing the strength of the attachment of the
orthodontic arch wire to the band and the efficiency of the arch
wire in the case of distorted or inclined teeth (FIG. 9).
According to another form of the invention (FIG. 13), the minor
arch ends 2 are bent in an anchorlike manner with the lateral ends
looped so that the loop apices face toward the minor arch
apices.
According to another form of the invention (FIG. 14), each minor
arch end is bent so as to extend towards the band 5 and thus
towards the anterior surface of the tooth 4 and then is turned to
lie on an axis that is parallel to the plane of the minor arches
and that extends towards the minor arch apices and the apex of its
associated tooth.
The orthodontic arch of this invention may be made by using,
instead of the usual wire of round cross-section, wires of other
cross-sections such as square or rectangular cross-sections.
The orthodontic arch may also be made by molding a metal wire, by
shearing a plate, or by a pressing operation. In these cases, there
is no difficulty in reproducing the ideal spacing of the teeth in
the patient's dental arches instead of making the minor arches of
the same average width.
The orthodontic arch may also be made of a metal or synthetic
plastic material.
* * * * *