Comparison of three different orthodontic wires for bonded lingual retainer fabrication

Abstract

ObjectiveWe evaluated the detachment force, amount of deformation, fracture mode, and pull-out force of 3 different wires used for bonded lingual retainer fabrication.MethodsWe tested 0.0215-inch five-stranded wire (PentaOne, Masel; group I), 0.016 × 0.022-inch dead-soft eight-braided wire (Bond-A-Braid, Reliance; group II), and 0.0195-inch dead-soft coaxial wire (Respond, Ormco; group III). To test detachment force, deformation, and fracture mode, we embedded 94 lower incisor teeth in acrylic blocks in pairs. Retainer wires were bonded to the teeth and vertically directed force was applied to the wire. To test pull-out force, wires were embedded in composite that was placed in a hole at the center of an acrylic block. Tensile force was applied along the long axis of the wire.ResultsDetachment force and mode of fracture were not different between groups. Deformation was significantly higher in groups II and III than in group I (p < 0.001). Mean pull-out force was significantly higher for group I compared to groups II and III (p < 0.001).ConclusionsDetachment force and fracture mode were similar for all wires, but greater deformations were seen in dead-soft wires. Wire pull-out force was significantly higher for five-stranded coaxial wire than for the other wires tested. Five-stranded coaxial wires are suggested for use in bonded lingual retainers.

Comparison between fiber-reinforced polymers and stainless steel orthodontic retainers

“…Bearn et al 20 claimed that wires with a larger diameter and greater surface area require greater force to pull the wire out from the composite resin. However, Baysal et al 21 found that the Penta One wire exhibited the highest mean resistance to displacement from composite resin, even though it was not the wire with the largest diameter.…”

Evaluation of bond strength and load deflection rate of multi-stranded fixed retainer wires: An In-Vitro Study

“…These studies also evaluated the amount of deflection brought about by the debonding force but not the magnitude of force needed for unit deformation. [ 7 8 9 ] Therefore, the present study was designed to evaluate and compare the bond strength of three commonly used fixed retainer wire-composite system including the three-stranded twisted retainer wire (3M Unitek) as well as the LDR for 0.5 mm deformation in these lingual retainer wires.…”

The effect of bonded resin surface area on the detachment force of lingual bonded fixed retainers: Anin vitrostudy

“…Bearn et al8 studied the effect of type of wire and type of composite and composite blocks. A few in vitro studies have compared the bonding strengths of lingual retainers with different combinations of wires and resins 9,10. Cooke and Sherriff9 performed an in vitro evaluation of the vertical force necessary for debonding lingual retainers constructed of different kinds of wires.…”