Fabrication of the acrylic splint Herbst appliance.

This article describes the fabrication of one type of Herbst appliance, a removable or fixed functional appliance that causes the posturing of the mandible in a forward position. The type of Herbst appliance described in this article consists of a wire framework to which are attached the various parts of the Herbst bite-jumping mechanism. The acrylic part of the appliance is fabricated from splint Biocryl or from methylmethacrylate. The steps of the fabrication of the appliance are described in detail.