Also referred to as The Bionator II, this appliance is designed to correct anterior open bites in Class I and Class II malocclusions. The posterior teeth are covered with acrylic to prevent their eruption, while the acrylic is kept away from the incisors to permit closure of the open bite. The mid-line expansion screw can be used for arch development, when indicated. Adding a “Balters Type” labial wire will also enhance lateral arch width development. Note: If desired, the lower incisors can be capped with acrylic if you wish to prevent their eruption. If so, please be sure to include this on your lab prescription.