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Fig.10. Showing diff. b/w Deflection (Springback) of 80 & residualdeformation after unloading.

Chinese NiTi > NiTinol > SS.


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Fig.2. Showing Stress Vs Strain curve representing Stiffness is inversely

Proportional to Springiness.


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Fig.1. Showing ANNEALING

It comprises of 3 phases, (1) Recovery, (2) Recrystallization, (3) Grain

growth.


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Fig.4. Showing desirable properties of Orthdontic wires.


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44

Wire Type Springback Stiffness FormabilityStored

EnergyFriction

Biocompatib

ility

&

Environmen

tal

Stability

Jointabilit

y

Stainless

SteelLow High Good Low Low Good

Solderable

&

Weldable

Cobalt

ChromiumLow High Good Low

Low to

ModerateGood

Solderable

Weldable

Nickel-

TitaniumHigh Low Poor High

Low to

ModerateGood

Not

Joinable

Beta-

TitaniumAverage Average Good Average High Good Weldable

Multi-

stranded High Low Poor High

Not

Known Good

Solderable

&Weldable

Fig.5. Showing comparison of desirable properties of different Orthodontic

wires. (a) SS, (b) Co-Cr, (c) NiTi, (d) -Ti & (e) Multi-stranded(Source: William A. Brantley, Theodore Eliades Orthodontic materials).


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Fig.14. Showing Cu-NiTi Orthodontic wire.


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Fig.19(a). Showing Maxillary retainer with QCM organic polymer wire.

Fig.19(b). Showing Prefabricated QCM retainer wires.

(A) Anterior portion. (B) Wave (C) Posterior portion.


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Fig.12(a). Showing comparison of Bending moment Vs. Deflection (STIFFNESS)

of Chinese NiTi Orthodontic wires.

(Activation and reactivation curves)

Fig.12(b). Showing comparison of Bending moment Vs. Deflection

(Spring Back) of Stainless Steel, NiTinol,

Chinese NiTi Orthodontic wires.

(For 80 activation, SS - 16, NiTinol - 52 & Chinese NiTi - 73 Deflection)


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Fig.17. Showing Beta Titanium Orthodontic wire.

(Pendulum Appliance - 0.032)


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Fig.18. Showing Beta Titanium Orthodontic wire.

(K-SIR ARCH WIRE 0.019/0.025)


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Fig.19. Showing CHINESE NiTi Orthodontic wire.


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Fig.16. Showing BETATITANIUM Orthodontic wire.


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Fig.20. Showing Dual flex Orthodontic wires.


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Fig.15. Showing TMA spring of two different cross sections of wire.

(0.018 inch round T-loop welded to a 0.017 x 0.025 inch base arch

wire called as composite spring).


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Fig.13. Showing comparison of Load Vs. Deflection of Co-Cr-Ni, Stainless Steel,

Work-hardened NiTi, Japanese NiTi Orthodontic wires.

(Different 0.016 wires)


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Fig.7. Showing Coaxial Orthodontic wire.


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(a) Premium Plus (b) Supreme

(c)Special Grade (d) Special Plus

Fig.6. Showing different types of Australian Orthodontics wires.


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Fig.8. Showing Nickel Titanium Orthodontic wires.


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Fig.9(a). Showing NiTi wire used in Beggs Brackets.

Fig.9(b). Showing NiTi wire used in Straight Wire Brackets.


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Fig.3. Showing 3 Point Bending Test of Orthodontic wires.(Standard test to demonstrate the Springback Property).


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Fig.21. Showing CNA Mushroom Loop Orthodontic wire.

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