(PDF) Mechanical Properties Of Beta-titanium Wires


Ju´ lio A. Gurgel

;Ce´lia R. M. Pinzan-Vercelino

; John M. Powers


Objective: To evaluate the drive-deflection conduct of six beta-titanium wires using a 3-level

bending take a look at.

Materials and Methods: The wires timolium (TIM), titanium molybdenum (ORG), beta titanium

(BETA), resolve (RES), titanium molybdenum alloy (TMA), and TMA low friction (TMAL) were

tailored into two stainless steel brackets, with no angulation or torque. Both brackets were bonded

to an acrylic jig with a 10-mm interbracket distance. A testing machine (Instron) applied deflections

of 0.2 to 2.0 mm. Force-deflection diagrams were decided from a passive position to an

activation of 2 mm after which throughout deactivation. Forces of activation and deactivation at a

deflection of 1 mm were in contrast by evaluation of variance.

Results: Results demonstrated that vital variations (P,. If you cherished this write-up and you would like to get more information about titanium tubing for sale kindly pay a visit to our webpage. 05) in pressure were noticed

among wires. During activation, forces for the wires had been ranked from lowest to highest as

TMAL5TMA5RES,ORG5BETA,TIM. During deactivation, forces for the wires had been ranked

from lowest to highest as TIM,ORG5BETA,RES5TMA,TMAL. The wires exhibited similar

activation-deactivation diagrams.

Conclusion: This study revealed significant variations in power during activation and deactivation

among the six varieties of beta-titanium wires examined. (Angle Orthod. 2011;81:478-483.)

KEY Words: Beta-titanium orthodontic wires; Orthodontic wires; Titanium molybdenum alloy


Orthodontic wires made from completely different alloys now

provide alternative sequences of wire utilization throughout all

phases of orthodontic remedy. It is now attainable to

match phases of remedy with orthodontic wires

in keeping with the mechanical properties of the wire. On

this foundation, the number of orthodontic wire ought to be

based mostly not solely on the transverse part of the wire,

but additionally on an understanding of the deactivation

traits of the wire required for different phases

of orthodontic treatment.


The beta-titanium (b-Ti) wires are titanium molyb-

denum alloys, introduced for orthodontic use in 1979

by Goldberg and Burstone.


These investigators

envisioned this alloy for orthodontic use after recog-

nizing such advantages as (1) elastic modulus beneath

stainless steel and close to to nickel-titanium bar (NiTi)

standard alloy, (2) glorious formability, (3) weld-

capacity, and (4) low potential for hypersensitivity.


However, use of b-Ti wire has disadvantages such

as (1) excessive surface roughness, which will increase friction

on the wire-bracket interface during the wire sliding

process, and (2) susceptibility to fracture during



To scale back floor roughness, a nitrogen

ion implantation technique has been used. However,

some authors


have questioned the effectiveness of

this process within the reduction of friction.

Initially, b-Ti wires have been used for specific software

in a segmented arch approach for making of retraction

loops. Recently, b-Ti wires have been used in the

building of an intrusion arch


and an uprighting

molar spring. Also, b-Ti wire is useful in cantilevers for

intrusion or extrusion of teeth. All of these functions

make it doable to individualize tooth movement and

still provide a managed force system.

In 1992, Hilgers


described the pendulum equipment

for distal molar motion performed with 0.032-inch


Professor and Chairman, Department of Orthodontics,

School of Dentistry, University Center of Maranha˜o, Sa˜ o Luis,



Professor, Department of Orthodontics, School of Dentistry,

University Center of Maranha˜o, Sa˜ o Luis, Brazil.


Professor, Department of Restorative Dentistry and titanium tubing for sale Bioma-

terials, University of Texas Dental Branch at Houston, Houston,


Accepted: October 2010. Submitted: July 2010.

Published Online: February 7, 2011

G2011 by The EH Angle Education and Research Foundation,


Corresponding creator: Dr Ju´lio A.

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