Final answer:
An RDH's ability to make a temporary crown depends on the regulations of the state where they are licensed. State regulations and permitted practices for dental hygienists vary, and an RDH might be allowed to perform this task if their state's dental board allows it and they have the necessary training.
Step-by-step explanation:
Whether a Registered Dental Hygienist (RDH) can make a temporary crown with their license depends on the regulations of the state in which they are licensed. Typically, dental hygiene scopes of practice are regulated at the state level, and these regulations can vary significantly. For example, in some states, dental hygienists are permitted to perform expanded functions such as fabricating temporary crowns under the direct supervision of a licensed dentist, provided they have received the appropriate training and certification. In other states, this might not be allowed.
If a RDH obtained their license in January 2009, it is possible that they have the necessary training and credentials to create a temporary crown if their state's dental board permits it. However, if you're inquiring about a specific situation, it is important to check the current dental practice regulations for the state in which the RDH practices.