ORTHODONTIC APPLIANCES To view more details, please click on the appliance type. Schwarz Appliances Hawley Retainers with Adams Claps Hilgers Pendex T-Rex Appliance Lower Fixed Expander Schwarz Appliances To correct bilateral cross-bites, eliminate anterior crowding, and to promote arch development. The upper Schwarz is designed with either one or two midline screws. The one-screw version is used with mixed dentition while the two-screw version is best for adult dentition. Adams clasps are used for maximum retention in the molar area, and arrow or ball clasps are placed between the bicuspids. The labial bow is made from .036 wire. The lower Schwarz can be used when expansion is needed for the mandibular arch.
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