self ligating guide
TRANSCRIPT
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Self Ligating System:Smartclip SL3 and Clarity SL
Presented By,
Dr. Prateek Lagoo
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Introduction
3M Self-Ligating Appliances are the innovative
choice for todays orthodontists.
These appliances are the only self-ligating
appliances with true-twin bracket design, and
they feature a unique nickel-titanium clip
mechanism for simple and efficient archwire
changes.
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Ligature
securesarchwire in
bracket slot
Clips secure
archwire in
bracket slot
Self-ligating Clip
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Ligatures can retain foodparticles around the bracket
and makes it more difficultfor patients to keep teethclean.
Ligatures are made ofelastomeric material thatstain over time from food
products
Self-ligating brackets removethe need to use ligatures
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The traditional tie-wings provide easy
application of auxiliaries for space closure
when desired.
The open slot concept was designed with
patient hygiene in mind because it facilitateseasy cleaning.
Damon 3Clarity SL
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Appliances are offered in
MBT Versatile+ Appliance System,
Ricketts (High Torque),
Roth (Low Torque) prescriptions.
It is a passive self-ligating system with true twin
bracket design.
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Advanced Clip Technology
The unique Nitinol clip used by 3M
Compared to earlier SmartClip Applianceversions, the advanced SL3 clip significantly
reduces wire insertion forces and removalforces required for large wires.
The clips have more room to flex, making
them more forgiving to wire misalignment,thereby helping to minimize patientdiscomfort.
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Bracket Handling
Although the SmartClip SL3 and Clarity SL
Brackets are designed as true-twin edgewisebrackets, the addition of the two Nitinol
retaining clips require mesial and distal
protrusions to hold the clips in place. The operator can use either reverse tweezers
or conventional cotton pliers.
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The bracket should be securely held by
grasping in between the tie-wings and on one
side of the bracket (mesial or distal).
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Bracket Positioning
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Archwire Engagement
The mechanism is a Niti clip that opens to the
archwire simply by applying pressure to theclips with the archwire.
This pressure varies with the individualarchwire dimension and material property.
Round archwires require no specialconsideration and can be inserted into thebracket slots by using normal finger pressure
against the clips.
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Before inserting rectangular arch-wires, it is
recommended that all levelling and alignment
and rotations be corrected.
Using the Unitek Wire Insertion Instrument as
a torqueing key will allow the clinician to align
the archwire with the torque angle of each
bracket.
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Archwire Engagement Sequence
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Before changing the arch-wires, make surethat the existing archwire is completelypassive and sliding freely before moving intolarger arch-wires.
This will ensure that the current archwire has
fully expressed itself with the lightest possibleamount of force.
The ability to use minimal force to move teethis a key benefit of the 3M Self-LigatingAppliance Systems.
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For sensitive patients, have patient bite down
on cotton roll before engaging and
disengaging archwire to provide occlusal
support.
Avoid the mesial and distal protrusions and
tie-wings when disengaging Clarity SL
Brackets to avoid breakage.
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Tandem Archwires: Dimension Details
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The combination of these two round archwires
provides maximum control of the vertical,
horizontal, and rotational dimension.
Proceeding to rectangular archwires should
never begin until the tandem archwires havebeen placed and have expressed themselves.
There is no need to disengage the initialarchwire, saving this step.
Tandem archwires can also be used in
segments rather than as a continuous archwire.
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Archwire Sequencing
Initial archwire sequencing with the
SmartClip SL3 and Clarity SL Brackets is
critical to the success of the appliances.
Because of the passive nature and low
frictional resistance of these appliances, lightresilient archwires should be used for initial
levelling and alignment.
By using small dimensional round wires, thereduction in binding friction can be optimized
without compromising control.
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wire size (inches) Torque Loss
0.018 SlotTorque Loss0.022 Slot
.014 .025 16 31
.016 .016 17 N/A
.016 .022 11 30
.016 .025 9 23
.017 .022 7 24
.017 .025 6 19
.017 .025 Hybrid 10 34
.0175 .0175 7 N/A
.018 .018 6 39
.018 .022 4 20
.018 .025 3 15
.018
.025 Hybrid 6
27
.019 .025 N/A 12
.019 .025 Hybrid N/A 21
.021 .021 N/A 6
.021 .025 N/A 5
.021 .025 Hybrid N/A 10
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A h i d ti
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Archwire sequence recommendations
By Dr. Anoop Sondhi0.018 slot
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0.022 Slot
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H S "W lki Wi
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How to Stop "Walking Wires
Due to the reduced frictional resistance with the
initial round archwires there is a tendency for the
archwire to "walk" through the brackets and
molar attachments freely, causing temporary
discomfort to the patient.
Apply crimpable stops on the archwire distal to
the most crowding Apply an AlastiK Ligature on an anterior tooth
that needs the least amount of correction
Use dimpled archwires
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Dimpled Archwire
S Cli SL3 S lf Li i M l
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SmartClip SL3 Self-Ligating Molar
Brackets
Re-designed to better serve Orthodontists'needs, SmartClip SL3 Molar Brackets have
small low profile tie-wings for enhanced
treatment flexibility.
The enhanced design accommodates either
steel ligatures for lacebacks and tiebacks or
AlastiK Ligature Modules.
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The maxillary 1st molar brackets incorporate
the distal offset into the bracket base rather
than into the slot, improving archwire
retention during treatment.
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Unitek Self-Ligating Bracket Debonding Instrument
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Bracket Positioning/lnter-Proximal
Reduction
Position the bracket slightly off-center on the
tooth to help with rotational control. (Figure 1)
When direct bonding, a Tarno instrument works
well for bracket positioning. (Figures 2-3)
All bracket repositioning and IPR should be
accomplished early in treatment
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S l i Cli E
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Selective Clip Engagement
Use the flexibility of the twin wing and clip design to
selectively engage the archwire for severe rotations.
Begin by engaging only one clip until preliminary rotation
correction is achieved. Forcing in an archwire will increase
the risk of distortion and spontaneous disengagement.
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Archwire segment should not
cross edentulous span or non-
bracketed teeth.
Conclusion
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Conclusion
With the development of Self-Ligating Bracket
systems, there is great improvement in qualityof orthodontic treatment by using reduced
frictional properties and physiologic forces for
tooth movement.
Sound knowledge of treatment modalities
with Self Ligating system helps the clinician torender optimum care to the patient in most
efficient manner.
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