U.S. patent number RE28,889 [Application Number 05/229,217] was granted by the patent office on 1976-07-06 for method and apparatus for orthodontic treatment.
This patent grant is currently assigned to Consyne Corporation. Invention is credited to Alexander J. Wildman.
United States Patent |
RE28,889 |
Wildman |
July 6, 1976 |
Method and apparatus for orthodontic treatment
Abstract
After securement of brackets of novel design to teeth of a
patient to be treated, impression is taken of the mouth. The
impression is removed, replicas of brackets are inserted in
impression and casting made of teeth which are then separated and
positioned in ideal location in a model. Arch wires are then
preformed to fit brackets on ideal model and after preforming, arch
wire transferred to mouth of patient. Brackets have groove to
receive arch wire which is locked in place by follower and snap
ring.
Inventors: |
Wildman; Alexander J. (Eugene,
OR) |
Assignee: |
Consyne Corporation (San
Marcos, CA)
|
Family
ID: |
26923077 |
Appl.
No.: |
05/229,217 |
Filed: |
February 24, 1972 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
Issue Date |
|
Reissue of: |
857351 |
Sep 12, 1969 |
03578744 |
May 18, 1971 |
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Current U.S.
Class: |
433/14 |
Current CPC
Class: |
A61C
7/12 (20130101); A61C 7/287 (20130101) |
Current International
Class: |
A61C
7/12 (20060101); A61C 7/28 (20060101); A61C
7/00 (20060101); A61C 007/00 () |
Field of
Search: |
;32/14A |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Peshock; Robert
Attorney, Agent or Firm: Jessup & Beecher
Claims
I claim:
1. An orthodontic arch wire bracket for attachment to a tooth band
and for connection to an arch wire means of predetermined thickness
comprising:
a body member including a base portion having a base surface for
attachment to a tooth band, a head portion having a labial
surface,
said head portion having a horizontal groove therein opening to
said labial surface for receiving an arch wire, said groove having
a depth greater than the said arch wire thickness,
said head portion having a first vertical groove therein opening to
said labial surface and having a depth relative to the depth of
said horizontal groove by an amount substantially no less than said
arch wire thickness,
said base portion having a second vertical groove therein,
said head portion having a notch therein extending between said
first and second vertical grooves and opening to said labial
surface of said head portion,
a follower member comprising a base portion adapted slidably to
engage within said second vertical groove, an arm portion adapted
to be received within said notch, and a finger portion adapted to
be received in said first vertical groove and to extend over an
arch wire engaged within said horizontal groove,
and lock means for releasably engaging said follower to prevent
accidental removal of the same form from said body member.
2. A bracket as set forth in claim 1 wherein said body member
comprises a shank portion between said base and head portions of
reduced cross-sectional dimension relative to said base and head
portions, said lock means comprising a snap ring adapted to be
received about said shank.
3. A bracket as set forth in claim 2 wherein the bottom of said
horizontal groove is spaced from said base portion by the thickness
of said snap ring.
4. A bracket as set forth in claim 1 wherein said notch is of
lesser width than said vertical grooves.
5. A bracket as set forth in claim 2 wherein said snap ring is
formed with wings projecting horizontally therefrom.
6. A bracket as set forth in claim 2 wherein said follower member
base portion is formed with indentations on each of its opposite
sides for receiving the ends of said snap ring during insertion or
demounting of said follower.
7. A bracket as set forth in claim 2 wherein said follower member
is provided with means releasably to engage the ends of snap snap
ring at a predetermined position of said follower member so as to
retain said follower member in a partially demounted position.
8. A bracket as set forth in claim 2 wherein said snap ring is of a
diameter greater than the horizontal extent of said head
portion.
9. An orthodontic arch wire bracket for attachment to a tooth band
and for connection to an arch wire comprising:
a body member including a base portion having a base surface for
attachment to a tooth band, a head portion having a labial surface,
and a shank portion positioned between said base and head portions
and being of reduced cross-sectional dimension relative to said
base and head portions,
said head portion having a horizontal groove therein opening to
said labial surface for receiving an arch wire,
said head portion having a first vertical groove therein opening to
said labial surface of the same depth as said horizontal
groove,
said base and shank portions having a second vertical groove
therein,
said head portion having a notch therein extending between said
first and second vertical grooves and opening to the surface of
said head portion,
a follower member comprising a base portion adapted slidably to
engage within said second vertical groove, an arm portion adapted
to be received within said notch, and a finger portion adapted to
be received in said first vertical groove and to extend over an
arch wire engaged within said horizontal groove,
and a snap ring adapted to be received about said shank and to
engage said follower to prevent accidental removal of the same from
said body member. .Iadd. 10. In combination:
a body having a guideway and also being provided with an opening
for receiving a member to be locked to the body,
the body also having a retaining portion adjacent the guideway,
a locking member having a slide portion slidable in the guideway
and a locking portion movable between first and second positions
relative to the body,
the locking member having a first snap ring engaging means and a
second snap ring engaging means spaced from the first snap ring
engaging means,
and a snap ring on the retaining portion having end portions
adapted to engage the first snap ring engaging means and hold the
locking member in said first position,
the end portions of the snap ring being separable to release the
same from the first snap ring engaging means and also being adapted
releasably to engage the second snap ring engaging means to hold
the locking member in said second position. .Iaddend. .Iadd. 11. In
an orthodontic arch wire bracket,
a body having a base attachable to a tooth band and also including
a head having a horizontal groove for receiving an arch wire and
open at the side thereof more remote from the base,
the body having a guideway offset laterally from and extending at
right angles to the groove,
a generally U-shaped follower having a slide arm slidable in the
guideway and a locking portion extending across the open side of
the groove when the follower is in a locking position thereof and
clearing the open side of the groove when the follower is in an
open position thereof,
and a snap ring on the body releasably holding the follower
relative to the body selectively in either the locking position or
the open position thereof,
the follower having shoulder portions engaged by the end portions
of the snap ring when the follower is in the locking position
thereof and also having recessed portions receiving the end
portions of the snap ring member when the follower is in the open
position thereof. .Iaddend. .Iadd. 12. In an orthodontic arch wire
bracket,
a body having a base attachable to a tooth band and also including
a head having a horizontal groove for receiving an arch wire and
open at the side thereof more remote from the body,
the base having a guideway extending at right angles to and offset
laterally from the groove,
a generally U-shaped follower member having a slide arm fitting
closely and slidably in the guideway between a closed position and
an open position and also having a locking portion adapted to
extend over an arch wire positioned in said groove when the
follower is in the closed position thereof and clearing the groove
when the follower is in the open position thereof,
and retaining means releasably holding the follower against
movement relative to the body when in the closed position and
releasable to permit the follower to be moved to the open position
thereof and to hold the follower in the open position thereof.
.Iaddend. .Iadd. 13. In an orthodontic arch wire bracket for
attachment to a tooth band and for connection to an arch wire,
a body including a base having a base surface for attachment to a
tooth band and a head attached to the base,
the head having a horizontal arch wire receiving groove open at the
side thereof more remote from the base,
the body also having a guideway extending at right angles to and
laterally offset from the groove,
and a follower having a slide portion fitting closely and slidably
in the guideway and also having a locking portion extending across
the arch wire,
the follower being vertically slidable between a closed position in
which the locking portion extends across the arch wire and an open
position in which the locking portion clears the arch wire,
the follower and the end of the head being blended together and
shaped to form a rounded, labial surface when the follower is in
its closed position. .Iaddend. .Iadd. 14. In an orthodontic arch
wire bracket for attachment to a tooth band and for connection to
an arch wire,
a body including a base having a base surface for attachment to a
tooth band and a head attached to the base,
the head having a horizontal arch wire receiving groove opening
away from the base and also having a notch,
the body also having a vertical guideway intersecting the
notch,
and a follower having a slide portion fitting closely and slidably
in the guideway, an arm portion fitting closely in and extending
through the notch and a locking portion over the arch wire and
blending with the head to form therewith a labial surface.
.Iaddend. .Iadd. 15. In an orthodontic arch wire bracket for
attachment to a tooth band and for connection to an arch wire,
a body including a base having a base surface for attachment to a
tooth band and a head attached to the base,
the head having a horizontal arch wire receiving groove open at the
side thereof more remote from the base,
the body also having a guideway,
and a follower having a slide portion fitting slidably in the
guideway between a closed position and an open position and also
having a locking portion extending across the arch wire when the
follower is in its closed position and clearing the arch wire
receiving groove when the follower is in its open position,
an end portion of the locking portion being inclined to cam the
arch wire into the groove when the follower is moved from its open
position to its closed position. .Iaddend. .Iadd. 16. In an
orthodontic arch wire bracket for attachment to a tooth band and
for connection to an arch wire,
a body including a base having a base surface for attachment to a
tooth band and a head attached to the base,
the head having a horizontal arch wire receiving groove open at the
side thereof more remote from the base,
the body also having a guideway,
a follower having a slide portion fitting slidably in the guideway
and also having a locking portion extending across the arch
wire,
the follower being slidable between a closed position in which the
locking portion extends across the arch wire and an open position
in which the locking portion clears the groove,
and a member on the body having outboard portions spaced beyond the
ends of the groove for engaging the inner side of the arch wire and
transmitting pivotal force from the arch wire to the body.
.Iaddend. .Iadd. 17. In an orthodontic arch wire bracket, body
means attachable to a tooth and having a horizontal groove having
an open side and a guideway extending transversely of and offset
laterally from the groove;
a locking member having a locking portion and a slide portion
slidable in the guideway between a closed position in which the
locking portion closes the open side of the groove and an open
position in which the locking portion opens the open side of the
groove to permit an arch wire to be moved laterally into the
groove;
and a generally C-shaped spring;
the body means having a portion entraping the spring;
the locking member having a pair of shoulder portions engaged by
the end portions of the spring when in said closed position and
held thereby in said closed position;
the locking member also having a pair of indentations engaged by
the end portions of the spring when in said open position and held
thereby in said open position. .Iaddend.
Description
BACKGROUND OF INVENTION
In accordance with what is known as the direct method of
orthodontic work, bands are positioned around the individual teeth
of a patient with brackets to permit connection of the bands to the
arch wire and various spring wires as are ordinarily utilized. This
technique requires considerable skill and judgment on the part of
an orthodontist in manipulating and forming the various force
applying wires so as to attain the desired movement of teeth.
In accordance with the so-called "indirect" method utilized
heretofore, bands and arch wires are formed in an ideal model and
then transferred to the patient. However, it is virtually
impossible to secure the bands on the patient's teeth in the same
location as on the model.
SUMMARY OF INVENTION
In accordance with the method of the invention and utilizing the
apparatus of the invention, an orthodontist is enabled to perform
the difficult and intricate task of forming an arch wire so as to
obtain the desired tooth movement on an ideal model of the teeth of
the patient while the arch wire is out of the mouth. Thereafter,
the arch wire can be transferred to the patient's mouth and easily
and quickly secured to the individual teeth by the novel brackets
of the invention.
More particularly, in accordance with the method of the invention,
arch wire brackets are secured by bands to the teeth of a patient
after which an impression is made of the patient's mouth. After
removal of the impression, replicas of the brackets are inserted in
a corresponding position in the impression and a casting made of
the teeth in the course of which the brackets will become rigidly
attached to the tooth castings. Thereafter, the individual tooth
castings are separated and reset in an ideal model of the patient's
mouth whereupon an arch wire can be formed so as to conform to the
bracket locations of the teeth in the ideal model. After formation
of such wire, it is transferred to the patient's mouth, whereupon
the memory of the wire will apply corrective force to the teeth
causing them to move towards their ideal location.
THE DRAWINGS
FIG. 1 is a perspective view of a portion of a bracket made in
accordance with the invention;
FIG. 2 is a perspective view of a so-called follower utilized in
the bracket of the invention;
FIG. 3 is a top view of an assembled bracket;
FIG. 4 is a sectional view taken along line 4--4 of FIG. 3;
FIG. 5 is a top view of a modification of the bracket of the
invention;
FIG. 6 is a top view of still another modification of a bracket
made in accordance with the invention; and
FIG. 7 is an elevation on reduced scale of a modification of a snap
ring adapted for use in the invention.
Reference is made first to FIG. 1 in which is illustrated a bracket
.Iadd.body .Iaddend.10 made in accordance with the invention and
which bracket comprises a base portion 12 adapted to be secured as
by brazing or other suitable means to a tooth band 14 which is
mounted upon the patient's tooth in any conventional manner. The
bracket also includes a head portion 16 having a labial surface 18.
As indicated, the base and head portions are preferably of circular
configuration, but need not be so, and extending between them is a
shank 20 which is of reduced diameter with respect to both the base
portion 10 and the head portion 16. The head portion 16 is formed
with a horizontal groove 28 therein for receiving an arch wire 30.
Preferably but not necessarily both the groove 28 and the arch wire
30 are of rectangular configuration. The head portion 16 is also
provided with a vertical groove 26 which in depth may be less than
the depth of the groove 28 but at least is of such depth that the
difference between the depth of the groove 28 and the groove 26 is
not greater than the thickness of the arch wire 39 the reason for
which will become apparent.
A second vertical groove 32 is provided in the bracket, such
vertical groove extending in the present embodiment through the
base and shank portions and preferably being of rectangular cross
section. Extending between the grooves 26, 32 is a notch 34.
Referring now to FIG. 2, adapted to cooperate with the bracket 10
is a locking member or follower 38 which includes a base portion 40
of rectangular cross section adapted to be slidably received within
the groove .Iadd.or guideway .Iaddend.32. Extending forwardly from
the base portion 40 is an arm 42 adapted to be received in the
notch 34 at the end of which arm is a locking .Iadd.portion or
.Iaddend.finger 44 adapted to extend forwardly of the arch wire 30
when the same is engaged within the groove 28, the lower end of the
finger 44 being received within the lower portion of the groove
26.
The follower 38 is adapted to be .Iadd.retained or .Iaddend.locked
in place by a snap ring 46 which in turn is adapted to be engaged
about the shank 20, the ends of the snap ring extending over the
top .Iadd.or shoulder .Iaddend.of the follower 38 when the follower
is fully inserted, as may be seen in FIGS. 3 and 4. The follower
base portion 40 is formed with grooves 48 in the opposite sides
thereof in which the ends of the snap ring 46 are received during
retraction or insertion of the follower. Preferably the follower 38
is provided with .Iadd.first .Iaddend.means releasably to engage
the snap ring in its .Iadd.first .Iaddend.partially withdrawn
.Iadd.or open .Iaddend.position with the finger 44 clear of the
groove 28. Such means may comprise an indentation 50 formed in one
or both of the walls 52 of the grooves 48 as shown in FIG. 4, or
other suitable stop means may be provided.
The bracket and follower are preferably formed of stainless steel
or other suitable corrosion resistant, high strength metal and can
obviously also be formed of high strength plastic or other
material. The groove 26 and arch wire 30 are preferably of such
dimension as to form a close fit, but they should, at the same
time, permit some longitudinal movement of the arch wire 30 through
the groove 28. Such movement is necessary, of course, to permit
adjustment of the position of the bracket on the arch wire as a
tooth rotates under pressure applied to it through the arch wire.
Likewise, the clearance between the finger 44 and an arch wire 30
must be such as to permit sliding movement of the wire.
In accordance with the method of the invention, the brackets 10 and
bands 14 are secured to the teeth of a patient. An impression of
the patient's mouth is then taken so as to obtain an impression of
the position of the teeth with the brackets attached thereto. The
impression is removed from the mouth and replicas of brackets 10
are inserted in the corresponding apertures formed in the
impression. Thereafter, a casting is made in the impression so as
to obtain a model of the patient's teeth with the bracket replicas
attached to the cast teeth. Next, the individual tooth castings are
separated by cutting or other suitable means and reset in their
ideal locations in a model. Next, an arch wire is formed so as to
fit the brackets of the ideal model and upon its completion this
arch wire is removed and attached to the brackets on the teeth in
the patient's mouth. Upon attaching to the teeth in the patient's
mouth, the memory of the wire will, of course, apply the desired
pressure to the teeth in the mouth to cause them to rotate or tip
or otherwise move as desired towards the ideal location. It may be
preferred to start the treatment with a wire applying only a small
amount of force and to increase the force applied as the treatment
continues by changing the wire. In any case, the orthodontist can
go back to his ideal model for forming the arch wire which is to
positioned in the patient's mouth.
As will be clear from the foregoing, to attach the arch wire to the
bracket the follower 38 is mounted on a bracket with the snap ring
engaged in the openings 50 so that the groove 28 is clear. The arch
wire 30 is then inserted within the groove 28 and positioned
against the rear wall of such groove and pressure then applied to
the follower 38 to cause it to move downwardly, thereby moving the
finger 44 over the arch wire 30 to hold it in .Iadd.its second or
locked .Iaddend.position. When the follower 38 clears the ends of
the snap ring 46, they will close over the top of the follower to
retain it in .Iadd.a closed .Iaddend.position.
To remove an arch wire the process is reversed, that is, the
orthodontist opens the snap ring 46, for which purpose a suitable
tool is provided. The follower 38 is then moved upwardly until the
ends of the snap ring 46 engages in the indentations 50. At this
point the finger 44 will have cleared the groove 28 so that the
arch wire 30 can be moved sideways and out of the groove 28. While
the bracket of this embodiment has been illustrated in connection
with a rectangular arch wire 30, it will be obvious that round arch
wires or bundles of two or more arch wires can be suitably
utilized. Also, while the method of the invention has been
described in connection with the brackets of FIGS. 1 to 4, it will
be apparent it may also be performed with other types of
brackets.
Referring to FIG. 5, a modification of a bracket of the invention
is therein illustrated, the bracket 10' of this modification
comprising a base portion 12' and a head portion 16', the
horizontal groove 28' in this embodiment being of such depth as to
extend to the shank 20'. Thus, the arch wire 30' abuts the surface
of the snap ring 46'. The follower in this embodiment includes a
base portion 70 fitting within a groove 72 formed in the base 12'.
Extending from the base portion 70 is an arm 42'. The arm 42' is
provided at its end with a finger 44' for engaging over the arch
wire 30' when it is fully inserted. The present embodiment has the
advantage over the prior described embodiment in that the length of
arch wire contact is increased to the edge of the snap ring 46',
that is, to the point X' compared to the point X thus increasing
the torque arm for rotational inclination of a tooth.
Referring to FIG. 6, in still another modification of the
invention, the finger 44" is of enlarged cross section relative to
the arm 42" and the vertical groove 26" of the receiving bracket is
correspondingly enlarged. This has the advantage of more securely
holding the follower in place than in the previously described
embodiments.
To still further increase the rotational torque arm, the snap ring
may be provided with wings 80 as shown in FIG. 7. Such wings can be
provided on a snap ring as used in any of the foregoing
embodiments.
Having described certain preferred embodiments it will be apparent
that the invention permits of still other modifications in
arrangement and detail.
* * * * *