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.
A dental assistant in the state of Georgia may perform basic supportive dental procedures specified by the state dental practice act and by rule of the Board under the direct supervision of a licensed dentist. There are no education or training requirements for this level of dental assisting.