Evaluation of Frictional Forces between Different Aesthetic Brackets and Arch Wires during Leveling and Alignment Stage

Aims: To compare the frictional forces between dierent types of aehetic brackets and Nickel Titanium (NiTi) arch wires during leveling and alignment age of orthodontic treatment. Materials and Methods: The sample of the udy included three types of ceramic brackets: active selfligating, monocryalline and polycryalline with metal slot in combination with 0.014 and 0.016 NiTi arch wires. The friction setup includes a cuomdesigned model with three nonleveled and nonaligned brackets. All tes were carried out in a dry ate on a digital tensile teing machine. The data were analyzed using the descriptive and inferential atiical tes at (p<0.05) signicance level. Results: The results demonrated that there were atiically signicant dierences between the udied groups of brackets and arch wires (p<0.05). Conclusions: The combination of the active selfligating ceramic bracket with 0.014 NiTi arch wire has the lea frictional force in the leveling and alignment age as well as the ceramic bracket with metal slot is a good alternative to solve the problem of friction.