طبقه بندي زايدات جامد صنعتي و اهميت آن در بازيافت و تعيين نوع مدفن مهندسي

Comparative evaluation of bending properties between superelastic nickel titanium orthodontic wires (G & H, Rematitan lite Force)

Background and Aim: Superelasticity refers to the same amount of force exerted by an ideal archwire independent of the degree of activation. Clinical findings show that in most of situations these materials do not fulfil the expected properties. The aim of this study was to evaluate the bending properties of some of these archwires. Materials and Methods: In this experimental research eight specimens of each of the round wires with 0.14, 0.16 and 0.018 inch sizes of force I, rematitan lite and superelastic G & H types were tested. These wires were subjected to a three point bending test by DARTEC machine. Data were tested by ANOVA and Duncan tests at 0.05 level of significance. Results: All of these materials showed Superelastic properties or at least Superelastic tendencies. More pronounced superelastic properties were observed in thicker wires. However, their force level of plateau for 0.014 inch rematitan lite wires the end of the plateau was observed when the wire was displaced at least 0.6 mm. Conclusion: In all of these wires, the force level of plateau was higher than the optimal force required for tipping movements.