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.
Physical therapists are licensed in all 50 states and the District of Columbia, Puerto Rico, and the Virgin Islands. Licensure is required in each state in which a physical therapist practices and must be renewed on a regular basis, with a majority of states requiring continuing education as a requirement for renewal. PTs must practice within the scope of physical therapy practice defined by these state licensure laws (physical therapy practice acts).