An orthodontic lab technician works to fabricate, repair, size, and replace removable appliances such as dentures or retainers and fixed dental features such as crowns. As an orthodontic lab technician, your duties include working with materials such as acrylic or metal. You may pour materials into molds the achieve the required shape, trim dentures, or shape appliances using pumice. In some cases, you may practice wire bending to get the desired shape for the products you create. Your responsibilities may also include cleaning, maintaining, and repairing lab equipment.