Made of stainless steel and biomedical techno polymer.
• The male screw is not in contact with the orthodontic acrylic resin: the function of the screw will not be influenced by the quality of the technical procedure and a non-compliant curing time.
• Continuous expansion movement: the high pressure injection of the polymer allows the perfect copy of the male thread of the screw thus ensuring a steady expansion transmission without the risk of undesired turning back in the mouth.
• The self-centering rectangular guides ensure a biomechanical and absolutely controlled symmetrical expansion.
