What Are the Different Parts of Braces? Elastic Tie Small rubber band that is hooked between different points on the appliance to provide pressure to move the teeth. Archwire (Wire) The main wire that acts as a track to guide the teeth along. It's changed periodically throughout treatment, as teeth move to their new positions. Elastic Power Chain (Power Chain) Small elastic ties that are connected together. These are used to close spaces or keep spaces closed. Bracket (Brace) Small attachment that holds the archwire in place. Most often, a bracket is cemented directly onto the tooth's surface, eliminating the need for a band. Headgear Tube Round, hollow attachment on the back bands. The inner bow of the headgear fits into it. Coil (Coil Spring) Fits between brackets and over archwire to open space between teeth. Wire Tie (Steel Tie) Small rubber band that is hooked between different points on the appliance to provide pressure to move the teeth. Molar Band A thin ring of metal fitted around a tooth and cemented in place. The band provides a way to attach the brackets to the tooth. Hook (Rubber Band Post) Welded or removable arm to which elastics (rubber bands) are attached.