Relationship between friction force and orthodontic force at the leveling stage using a coated wire

Relationship between friction force and orthodontic force at the leveling stage using a coated wire

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The relationship between orthodontic force and friction produced from an archwire and brackets affects the sliding of the wire in the leveling stage.Objective: The purpose of this study was to evaluate the relationship between force and friction in a small esthetic nickel-titanium (Ni-Ti) wire.Material and Methods: Five esthetic wires (three coated and two fume mini flavors plated) and two small, plain Ni-Ti wires (0.012 and 0.

014 inches) were used.We performed a three-point bending test according to ISO 15841 and the drawing test with a dental arch model designed with upper linguoversion of the lateral incisor in the arch (displacements of 0.5, unseen sunscreen sale 1.0, 2.

0 and 3.0 mm), and evaluated the relationship between them.Results: Unloading bending forces of all wires at displacements of less than 1.0 mm were larger than friction forces, but all friction forces at displacements exceeding 2.

0 mm were larger than unloading bending forces.The arch likely expands when displacement from the proximal brackets exceeds 1.0 mm.The friction force of a martensite 0.

014-inch Ni-Ti wire was significantly greater than those of the other esthetic and austenitic wires.Conclusions: A wire with the smallest possible friction force should be used in cases with more than 1.0 mm displacement.