<p>Appliance selection for lower arch development is often determined by the type of arch constriction and patient compliance factors. Where some patients will wear and can tolerate two removable appliances, there are many times that a lower fixed appliance is preferred in combination with an upper removable arch development appliance to minimize the cooperation factor. The following are just a few of the more frequently prescribed lower arch development appliances.</p>

<p>The Lower Schwarz is always a popular appliance choice due to the ease of placement and adjustment. Many doctors find that intercanine arch development can be obtained with the appliance but that limited molar width changes are achieved. The lower Schwarz is frequently used in combination with the upper Fan or Hinge appliance.</p>

<p>The Lower Jackson is an excellent appliance choice for lower arch development. The main expansion body wire transmits the pressure effectively to the molars, premolars and cuspids. Lap springs are included for anterior development as the case progresses. The lower Jackson is most often used with an upper Schwarz appliance to develop both arches in young patients.</p>

<p>Lower arch development with a fixed appliance is common in combination with a removable upper Schwarz when patient compliance with two removable appliances is questionable. The lower 3D Quad Action Mandibular is a frequent choice. The appliance is a modular fixed/removable for easy adjustment and allows the active appliance to be replaced with a holding arch without changing anchor bands.</p>
