There Exists a bending limit to each sort of NiTi wire. Forcing the wire earlier the limit triggers unwanted everlasting distortion while in the wire, from which “memory wire” can't Recuperate. NiTi or Stainless Steel wires are coated with Teflon/5META/Tooth coloured epoxy resins. four Coating resources are synthetic resin or waiting for link from Web 2.0 Blogs (1)