NiTi Or Stainless Steel wires are coated with Teflon/5META/Tooth coloured epoxy resins. four Coating materials are artificial resin or plastic resins which include epoxy resins.3 Coating increases esthetics and reduces friction but Here are a few cons as well. Orthodontic wires are normally classified by the fabric that composes them. https://www.ortix.co.uk/wires/