Final answer:
A licensed dental hygienist can legally perform all the tasks that a registered dental assistant can, as they have a broader scope of practice due to their higher level of education and licensing.
Step-by-step explanation:
Regarding the question, Is a licensed hygienist able to legally perform any procedure that a registered dental assistant can perform? The answer is True. A licensed dental hygienist typically has a broader scope of practice compared to a registered dental assistant, including more advanced tasks related to dental care and oral health. Dental hygienists are required to complete more extensive education and pass licensing exams, which qualifies them to perform all the tasks of a dental assistant and more, depending on the regulations of the state where they practice.