My point in sharing these links is to point out that even though kids are dying from teeth extractions performed by DDS and Oral & Maxillofacial Surgeons... standards are being lowered still !
States where dental hygienists may administer locals
http://www.adha.org/governmental_affairs/downloads/localanesthesiamap.pdf
States where dental hygienists can administer nitrous
http://www.adha.org/governmental_affairs/downloads/Nitrousmap.pdf
Dental Hygiene Practice Act Overview:
Permitted Functions and Supervision Levels by State
http://www.adha.org/governmental_affairs/downloads/fiftyone.pdf
Comparison of Tasks: Dental Therapist vs Advanced Dental Therapist
http://www.dentalboard.state.mn.us/Default.aspx?tabid=1165
The principles, competencies, and curriculum for educating dental therapists
(American Assoc of Public Health Dentistry Panel)
http://onlinelibrary.wiley.com/doi/10.1111/j.1752-7325.2011.00263.x/full
