self ligating guide

8/2/2019 Self Ligating Guide

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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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/


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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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self ligating guide

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