Permanent Deformation Comparison of 0.014 Nickel-Titanium Thermal Wires using IMD Orthoshaped, American Orthodontics and Ormco

Orthodontic treatment is currently increasingly popular in Indonesia. Currently there are various types of orthodontic wire in Indonesia, including nickel titanium wire. Characteristics of wire include its deformation properties after wire is subjected to force load. In NiTi wire, when wire is permanently deformed, the deactivation force of wire is also reduced to move the teeth. 27 samples were used and divided into 3 groups wire products (9 samples each), there were IMD Orthoshaped, American Orthodontics, and Ormco. All wires were inserted to bracket slot on research prototype which designed to allow deflection of 7 mm in certain part of wire. Wire was applied for 28 days and was measured using digital caliper by comparing deflection between new or control wire and deflected wire (the same product). There was significant difference in permanent deformation between three thermal NiTi wire products. The sequence of permanent deformation values in several wire products based on the smallest value were Ormco, American Orthodontics, and IMD Orthoshaped. Conclusion: The used of 0.014- in diameters thermal NiTi wire which has the least permanent deformation is good for use in early stages of orthodontic treatment so that maximum and efficient tooth movement can occurred.