FIELD OF INVENTION
This invention is directed to lingual bracket positioning device for indirect
bonding with teeth.
BACKGROUND1 PRIOR ART
'Bracket placement on the lingual surfaces of teeth is much more difficult than
on the buccal surface as it is the buccal surface of the teeth which is required
to be aligned to form an anatomically correct dental arch. While there are
variations on buccal surface, the attachment of the brackets directly to the
surfaces to be aligned manages most of the variations and produces excellent
results with minimal archwire bending. Ease of manipulation to achieve quality
'finished' orthodontic case is directly related to the quality and precision of
bracket placement.
In contrast the lingual surface of teeth is not the surfaces to be aligned. The
lingual surfaces do not have a constant relationship with the buccal surfaces;
therefore a constant bracket prescription for each tooth as in straight wire
3 mechanics will not achieve consistent quality resulting from minimal archwire
manipulation. Besides the exact tip & torque for lingual bracket in various
cases like non extraction and extraction is yet to be introduced in near future.
The indirect bonding technique for installation of orthodontic brackets requires
two basic elements. ~ i r s ta, n accurate measuring or placement device for the
determination of the position of an archwire slot (includes tip, torque, rotation
and height, and in/out) on the buccal surface of each tooth which will position
that surface ideally if the archwire slot were engaged with a full sized
preformed archwire. This accurate measuring or placement device would be
applicable to the straight wire concept of orthodontic therapy. Secondly,
transfer of device which would transfer the buccal archwire slot position to a
parallel lingual slot position (includes tip, torque, rotation, inlout and height)
which 'could be attached to the lingual surface of the patient's teeth, i.e. the
archwire slot on the lingual surface of the patient's teeth would be directly
related to the buccal surface rather than to t'he lingual surface.
For correct alignment of the teeth, the following steps are adopted according to
one prior art:-
- Preparing a cast of jaw for upper and lower teeth
- Preparation of kesling set-up and final arch wire
- Making separate bracket base considering individual tooth configuration
- Preparation of individual positioning jig to transfer the base with bracket
to the original teeth.
However, the aforesaid prior art is associated with the following drawbacks:
- Expensive
- Tedious job consuming atleast a week owing to the fact that individual
base is required to be made by skillful like dentist
- Requirement of rebonding for preparation of jig.
Another prior art provides torque angulation device which is employed in order
to customize base of bracket relying on the caste of jaw, for which individual
I i blade is required.
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The drawbacks of the above can be listed hereinbelow:
- Variation in labial range is not possible as there is one reference guide
(i.e. only one single guide cari be used)
- Expensive
- Requirement of skillful professional
- Not easily available in India.
In view of the above, there is a requirement to introduce lingual bracket
positioning device for indirect bonding with teeth which can address the
aforesaid issues.
OBJECTS OF THE INVENTION
A primary object of the present invention is to propose lingual bracket
positioning device for indirect bonding with teeth which obviates shortcomings
of known art.
Another object of the present invention is to propose lingual bracket
positioning device'for indirect bonding with teeth which is cost effective.
Still another object of the present invention is to propose lingual bracket
positioning device for indirect bonding with teeth which does not necessitate
skillful professionals to conduct operation.
Yet another object of the present invention is to propose lingual bracket
positioning device for indirect bonding with teeth which is easy to implement.
I P Q DEEHH I O - 0 2 - 2 2 1 1 6-7 '. 52
Further another object of the present invention is to propose lingual bracket
positioning device for indirect bonding with teeth which involves wider 'labial
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I range suiting requirement of each patient.
I : SUMMARY OF THE INVENTION
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I According to this invention, there is provided lingual bracket positioning device
1 for indirect bonding with teeth comprising a main pillar secured to a clamp
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holding a caliper for adjustment of a lingual bracket disposed against cast of
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I tooth supported by means of a tri-pod unit.
I BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS
Further objects and advantages of this invention will be more apparent from
the ensuing description when read in conjunction with the accompanying
drawings of exemplary embodiments and wherein:
Fig. 1 shows: Rear view of lingual bracket positioning device -for indirect ,
bonding with teeth gccording to present invention.
. I Fig. 1A' shows: Front view .of lingual bracket positioning device for indirect I i
bonding with teeth according to present invention. i
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Fig. 1B shows: Enlarged view of tri-pod of present invention. 1
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I Fig. 1C shows: Zoomed'view of digital calliper in open and closed condition.
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Fig. 2 to 5 shows: Adjustment of lingual bracket for a particular tooth with the
help of labial bracket and lingual bracket with base.
DETAIL DESCRIPTION OF THE PRESENT INVENTION WITH REFERENCE
TO THE ACCOMPANYING DRAWINGS:
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The present invention makes disclosure in respect of lingual bracket
positioning device for indirect bonding with t-eeth. This invention facilitates the
method of lingual placement of bracket. More specifically lingual placement of
bracket has a pre-requirement of accurately determine the three dimensional. I
orientation uf each tooth namely tip, tarqlie, in-out & rotation. Once the I
orientation of each tooth is ascertained accurately, bracket can be placed based I on lingual surface which is according to lingual archform or wire bending of the
individual case. This present invention gives liberty to orient each tooth
according to case requirement followed by lingual placement of bracket in I
predetermined position relying on archform. Now, reference may be made to fig.
1 .and 1A illustrating device of the present invention.
The device comprises a platform (1) supporting the entire assembly, wherein
the platform is preferably made of wood to render it light weight. I
The platform provides a base to work thereon. The platform is mounted with a
main pillar (3) on one side as shown with an annular plate (2) around the base
of said main pillar (3). The main pillar (3) is provided to hold a clamp (4), which
is slidable across the pillar vertically.
There is also provision of a bush (5) between the clamp and pillar to reduce the
friction therebetween and provide firm grip of the clamp over pillar.
The clamp is implemented to support a digital caliper (21) through a set of
sliding pillars (1 1, 12) as shown. Said set of sliding pillars include a plurality of
side pillars (1 1) wherein one of the side pillars is spring (13) loaded to give fine
movement to the rebound effect so as to make the operation smooth. The side
pillars are meant for vertical movement of working unit i.e. the clamp and the
middle pillar (12) limits the upward movement of working unit (clamp).
Further, .arm of clamp (8) is employed to secure a dial test indicator (14)
therewith. Said dial test indicator (14) includes display (1 5), on/off unit (16),
calliper ( 17) and sensor (1 8) as indicated in fig. 1.
The dial test indicator is optionally provided as the digital calliper plays role in
the course of adjustment. Thus, the invention can do away with the provisiotl
of the dial test indicator.
In addition to the above, there is provided an adjusting bolt (6) for adjustment
of heighi of said clamp from the platform (1) by securing the same at any
working height. Further, a stud (7) is available with a pitch of lmm for vertical
movement of the clamp, which can be achieved above lmm. 1
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In conjunction with the above, there is an adjusting bolt (9) for fine adjustment I
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of the clamp height in the order of 0.0 1 mm. I
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The working unit of invention comprises a digital calliper (2 1) with a fixed outer
jaw (27) and movable inner jaw (29). The digital calliper is connected to a slider
(19) by means of a scale (20).
The calliper, movable jaw of which can be linearly slided towards the main
pillar (3) with the help of the slider so as to fur the inner jaw at the desired
position. The scale is meant for measuring the horizontal movement.
The digital calliper (21) reflects the digital reading of the horizontal movement
in its display (23).The calliper is having a working screw (22) for adjustment of
linear movement of the inner jaw and a fixing screw (26) for furing the inner jaw
at a particular position. The calliper runs on battery with on/off unit.
I P D D E L H I 89-02-2016 1 7 : 52,
1 ' . Under the calliper, a tri-pod unit as in fig. 1B is placed on the platform as
shown in the figure. The tri-pod unit includes a base (31) supporting a. 3-D
revolving container (34) through ball and socket joint (33).
The ball and socket joint imparts three dimensional movement (X,Y,Z) to the
container, which acts as a platform for 'cast of tooth to be used.
In addition to the above, the tripod unit includes a lock (32) for locking the
container at any required plane and a fixing screw (35) for furing the cast at the
I required position in the container.
,Now reference may be made to fig. 1C and 2-5, in which the fixed outer jaw (27)
constitutes tip and torque stabilizing arm which faces labial surface of tooth
during adjustment.
The fured arm is integrated to a guiding blade (28), against which a labial
I bracket (L) is placed as in fig. 3. The blade provides the desired tip and torque
according to the bracket used. Thereafter labial surface of cast of tooth (T) is
disposed against the bracket base as in fig. 4.
The movable inner arm forms bracket positioning arm (29), which is integrated
I to ,a positioning.blade (30). Once labial bracket in tip and torque blade is fured,
a lingual bracket (B) is positioned against the positioning blade (30) wherein
I the lingual bracket is fured at a desired width. Then with the help of adhesive
I (A) customized base is obtained. This lingual bracket with base is required to
I be set by movement of the working screw (22) till the predetermined thickness
of tooth is accomplished, which is displayed on the display of digital calliper.
I The device is more flexible as it can accommodate multiple bracket
prescription.
The brackets for individual tooth thus obtained are transferred using transfer
tray, wherein the tray is made of bioplast (soft acrylic). Further, rebonding can
be dune using the same tray.
Thus, once a11 thc brackets are positioned, it is transferred to thermoplastic bio
acrylic - t-r ay-s from where brackets-are indirectly traiisfer.~edt o mouth. The
device is provided for accurate translation of any required tip and torque from
labial surface to the lingual surface of teeth of any malocclusion for indirect
bonding procedure.
It is to be noted that the present invention is susceptible to modifications,
adaptations and changes by those skilled in the art. Such variant embodiments
employing the coricepts and features of this invention are intended to be within
the scope of the present invention, which is further set forth under the
following claims: -

WE CLAIM:
Lingual bracket positioning device for indirect bonding with teeth
comprising a 111air1 pillar secured to a clamp holding a caliper for
adjustment of a lingual bracket disposed against cast of tooth
supported by means of a tri-pod unit.
2. Lingual bracket positioning device for indirect bonding with teeth as
claimed in claim 1, wherein the main pillar and tripod are placed on a
platform with an annular plate around base of said pillar.
3. Lingual bracket positioning device for indirect bonding with teeth as
claimed in claim 1 or 2, wherein said calliper is held to the clamp by
means of a set of sliding pillars including atleast two side pillars with
a middle pillar therebetween, wherein one of the side pillars is spring
loaded to give fine movement to the rebound effect.
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4. Lingual bracket positioning device for indirect bonding with teeth as
claimed. in any of the preceding claims, wherein the side pillars are
meant for vertical movement of working unit and the middle .pillar
limits the upward movement of working unit.
5. Lingual bracket positioning device for indirect bonding with teethas
claimed in any of the preceding claims, comprising an adjusting bolt
I for adjustment of height of said clamp from the platform, a stud for
I mini vertical movement of the clamp and an adjusting bolt for fine
1 ; adjustment of the clamp height.
6. Lingual bracket positioning device for indirect bonding with teeth as
claimed in any. of the preceding claims, wherein the working unit
comprises a digital calliper with a fixed outer jaw and movable inner
jaw, in which the digital calliper is connected to a slider by means of a
scale. I
7. Lingual bracket positioning device for indirect bonding with teeth as
. claimed in any of the preceding claims, wherein the calliper, movable
jaw of which can be linearly slided towards the main pillar with the I
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help of the slider so,as to fix the inner jaw at the desired position. 1
8. Lingual bracket positioning device for indirect bonding with teeth as i
claimed in any of the preceding claims, wherein the calliper is having I
a working screw for adjustment of linear movement of the inner jaw 1
and a fixing screw for fixing the inner jaw at a particular position.
9. Lingual bracket positioning device for indirect bonding with teeth as
claimed in any of the preceding claims, wherein the tripod unit is
located under the. calliper, in which the tri-pod unit includes a base
supporting a 3-D revolving container through ball and socket joint.
10. ' Lingual bracket positioning.device for indirect bonding with teeth as
claimed in any of the preceding claims, wherein the tripod unit is I
having a lock for locking the container at any required plane and a I
fiing screw for fixing the cast at the required position in the I
container.
I' 1. Lingual bracket positioning device for indirect bonding with teeth as
claimed in any of the preceding claims, wherein the fured outer jaw
constitutes tip and torque stabilizing arm integrated to a guiding
blade, against which a labial bracket is placed and the labial surface
of tooth cast is disposed against the bracket base.
12. Lingual bracket positioning device for indirect bonding with teeth as
claimed in any of the preceding claims, wherein the movable inner
arm forms bracket positioning arm, which is integrated to a
positioning blade, against which a lingual bracket is positioned,
wherein the lingual bracket 'is fmed at a desired width.
13. Lingual bracket positioning device for indirect bonding with teeth as
claimed in any of the preceding claims, wherein the lingual bracket
with base is required to be set' by movement of the working screw till
the predetermined thickness of tooth is accomplished, which is
displayed on the display of digital calliper.