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1. BRAKING ARCHES
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INDIAN DENTAL ACADEMY
Leader in continuing dental education
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2. 1. Indications:
a.) Protraction of posteriors
b.) Control tipping of incisors
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3. Braking mechanics.
It reverses the anchorage site from
the posterior to the anterior segment
by permitting only the bodily
movement of the anterior teeth
instead of tipping.
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4. Base arch wire in braking mechanics:
• 018” premium or premium plus
• 020” premium wires
Heavier wire are effective in maintaining
rotation, deepbite and arch forms
Reduced anchor bends
Anchor curves – posterior segment of
the arch wire kept gingival to prevent
canine extrusion.
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5. This conversion of tipping to bodily
movement in M-D direction for K9 and
lateral incisor.
• Braking springs - Passive uprigthing springs
(0.018” )
• T – Pins Angulated
Non angulated
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6. 0.018” Braking
springs
T – Pins
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7. In labio-lingual direction for the incisors:
Combination wires
1. S.S wire 0.019” x 0.025”
(0.025” in ribbon mode and 0.019” edgewise mode)
2. Alpha titanium wire 022” X 018”
3. Tandem Wires
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8. 3. NiTi or S.S Braided 017” X 025” in
ribbon mode, Piggy back over the base
wire
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9. Stainless steel braided 017” X 025”
in ribbon mode as a passive torquing
auxiliary
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10. Torquing Auxiliaries :
• 2 spur
• 4 spur
• MAA – 011”
Less activation
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11. Elastic configuration :
• Endon molar relationship:
a. Class II with lower Class I elastics
b. Class II elastics with U / L Class I elastics
a. b.
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12. c. Class II elastics given in increased over jet
because of faster retraction of lower anteriors.
d. Only lower Class I elastics in case of anterior
crossbite.
c. d.
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13. Strength of elastics :
For protraction of a posteriors
stronger Class I elastics are used.
Counteracting the rotational
effects on molars due to Class I
heavier elastics can be done by giving
toe-in bend to prevent undesired
molar rotation.
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14. CONCLUSION.
When extraction space is to be closed
by protraction of posteriors without
retraction of anteriors, it can be
achieved by using efficient braking
mechanics auxiliaries.
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