California Registered Dental Assistant (RDA) Written Practice Exam

The correct answer is B. An RDA, or Registered Dental Assistant, is legally allowed to fabricate and cement a provisional in a dental office. This is because RDAs in most states have completed specific training and passed exams that allow them to perform certain tasks, including making and placing temporary crowns. While a dentist is the only one who can diagnose and plan treatment, a dental hygienist's scope of practice does not typically include provisional fabrication. A dental assistant without a license may not have the specialized training or education needed to safely and effectively create and place a temporary crown.