AZDENT Dental Orthodontic Arch Wire NiTi Expanded Round 0.012-0.020 10pcs/Pack. Used For Dental orthodontic treatment. Excellent resilience, even in the case of small deformation still can provide continuous force, ensure fast and effective tooth movement. The single greatest advantage of the premarked arch wire is the decrease in patient chair time made possible by eliminating repeated arch wire insertions to replace lost, smeared, or drifted wax marks. Adjustment bends can be made accurately and quickly with a reduction in discomfort to the patient.