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.
Each state makes individual standards of care for dental professions in the field and there are several levels of licensed dental assistants such as a DA, QDA, and CDA. All st â¦ ates do not allow dental assistants to clean adult teeth or use scalers to clean under the gingival tissue. Some states do allow assistants to polish or clean above the teeth on young children.