Elastic Tie 
          Tiny rubber band that fits around the bracket to hold the archwire in 
          place. 
        Loop in Archwire 
          Frequently used for closing space left by an extraction. Many archwires 
          don't have a loop. 
        Archwire 
          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. 
        Bracket 
          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 Spring 
          Fits between brackets and over archwire to open space between teeth. 
         
        Tie Wire 
          Fine wire that is twisted around the bracket to hold the archwire in 
          place.  
        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 
          Welded or removable arm to which elastics (rubber bands) are attached. 
        Elastic (Rubber Band) 
          Small rubber band that is hooked between different points on the appliance 
          to provide pressure to move the teeth. 
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