The properties of different orthodontic rectangular arch wires in torsion / 华西口腔医学杂志
West China Journal of Stomatology
;
(6): 152-155, 2008.
Article
in Chinese
| WPRIM
| ID: wpr-296691
ABSTRACT
<p><b>OBJECTIVE</b>To study the properties of orthodontic rectangular arch wires in torsion.</p><p><b>METHODS</b>By using the torsion measurement apparatus, torsion moments and angles of four kinds of orthodontic wires (0.46 mm x 0.63 mm and 0.48 mm x 0.63 mm stainless steel wires, and the same size nickel-titanium wires) were tested respectively in a 0.56 mm-slot first maxillary incisor bracket. According to the torsion moments and angles, scatter graphs were drawn to fit the load-deflection curves of four kinds of wires and their linear equations were calculated. According to the equations, the torsion stiffness and the play angles of the wires at 20 N mm correspondingly were calculated.</p><p><b>RESULTS</b>The torsion stiffness of four kinds of wires were 4.909, 6.417, 1.325 and 1.363 N mn/degrees, the torsion angles of different wires were 19.14 degrees, 15.33 degrees, 36.83 degrees and 35.07 degrees at 20 N mm respectively.</p><p><b>CONCLUSION</b>The torsion stiffness of stainless steel wires was bigger than that of the same cross-section dimensional nickel-titanium wires. The difference of torsion stiffness between two dimensional nickel-titanium wires is smaller, while the difference of torsion stiffness between two stainless steel wires is larger.</p>
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Orthodontic Wires
/
Stainless Steel
/
Titanium
/
Incisor
/
Nickel
Language:
Chinese
Journal:
West China Journal of Stomatology
Year:
2008
Type:
Article
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