Comparison of surface roughness and hardness of three different brands of esthetic coated NiTi archwires: invitro study.

Background: The purpose of the current in vitro study was to evaluate the surface roughness and hardness of three brands of as-received esthetic coated NiTi archwires and compare them with the same parameters after immersion in artificial saliva.

Methods: Three groups of 0.016 × 0.