For example, a graphite/epoxy (graphite fibers suspended in an epoxy matrix) lamina may be on the order of 0.127 mm thick. For the purpose of analysis, a lamina is typically modeled as having one layer of fibers through the thickness.
Minnesota allows dental therapists with direct supervision; and advanced dental therapists (ADT) with general supervision. ADTs may be dually licensed as an ADT and registered dental hygienist (RDH). Maine allows dental hygiene therapists (DHT) with direct supervision.
Dentists can specialize in a variety of different areas of the field, ranging from pediatric and periodontal to oral surgery and orthodontics. Many dental programs offer different concentrations for students who have a fine-tuned idea of the type of oral health care they wish to provide.