Used by orthodontist to show procedure as teeth shift back in place this wax gum model allows positioning and changing scenarios as the procedure evolves. This piece is as the orthodontic left it long ago and show some brackets in place and tied in. Model is in great condition and the colors look great against the shiny chrome. Made by Colombia Dentoform a company that has been around since 1914 making phantoms and models for educational and professional use. The top of teeth flip up and base can adjust in heights. The teeth sets can come off via thumb screws on top and bottom of sets.