PROTRACTION HEADGEAR

摘要

In a facebow which overcomes the adverse effects and limitations of current designs by rotating the maxilla in a downward and forward direction, which assists in correcting anterior open bites, this being accomplished by a design that produces forces above the center of resistance of the maxilla and parallel to the Frankfurt horizontal plane. The extra-oral headgear design is characterized by providing two independent adjustments (forehead width and horizontal/vertical dimensions) that allow the appliance to be customized to each patient. In particular the two independent adjustments are provided by a fully adjustable forehead pad and bilateral adjustable blocks on opposite sides of the facebow extra-oral frame to provide horizontal and vertical adjustments.