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Force System with Vertical V-Bends: A 3D In Vitro Assessment of Elastic and Rigid Rectangular Archwires
Published on: July 24, 2018
Force-deflection properties of initial orthodontic archwires
Cátia Cardoso Abdo Quintão1, Julio Pedra e Cal-Neto, Luciane M Menezes
1Department of Orthodontics, State University of Rio de Janeiro, Rio de Janeiro, Brazil. cquintao@artnet.com.br
World Journal of Orthodontics
|April 25, 2009
Summary
Nickel-titanium and multistranded stainless steel archwires exhibit suitable force-deflection properties for orthodontic leveling and aligning. Conventional stainless steel wires demonstrated the highest deactivation forces.
Area of Science:
- Orthodontics
- Biomaterials Science
- Dental Mechanics
Background:
- Initial alignment archwires are crucial for the leveling and aligning phase in orthodontic treatment.
- Understanding the force-deflection behavior of different archwire materials is essential for predictable treatment outcomes.
Purpose of the Study:
- To compare the force-deflection characteristics of four distinct initial alignment archwire designs.
- To evaluate the suitability of multistranded stainless steel, conventional stainless steel, superelastic nickel-titanium, and thermoactivated nickel-titanium archwires.
Main Methods:
- In vitro three-point bending tests were performed on selected archwires.
- Wires were tested under controlled conditions at 37°C with 2.0 mm deflection.
- Force-deflection measurements during deactivation were analyzed using ANOVA and Tukey post-hoc tests.
Main Results:
- Significant differences in deactivation forces were observed among the archwire groups (P < .05).
- Multistranded stainless steel wires exhibited the lowest mean deactivation force (1.94 N).
- Conventional stainless steel wires showed the highest mean deactivation force (4.70 N), while nickel-titanium wires demonstrated forces similar to multistranded steel.
Conclusions:
- Both nickel-titanium and multistranded stainless steel archwires are potentially adequate for the leveling and aligning phase.
- The findings suggest that these archwire types offer favorable force-deflection behavior for initial orthodontic tooth movement.
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