Only properly trained and qualified dental professionals should be allowed to operate high speed instruments. I am a Registered Dental Hygienist after 4 years of education as well as passing a national and clinical exam yet I am still not allowed to operate a high speed instrument in a patient's mouth so a DAII is certainly not qualified! Dental assistants do not obtain adequate training to allow them to use something that performs irreversible changes to tooth anatomy, and allowing them to do so will put patients at unnecessary risk to great harm. A definite NO!