A dental assistant is only allowed to make x-rays. The remainder of the job involves administrative duties regarding the office along with collecting information about the patient's medical history and offering some tips on preventative care.
A dental assistant can become a dental hygienist but must seek additional education and training.
Entry level dental assistant jobs are best offered by new dental practices. These are usually the best places to seek dental assistant training jobs because they have smaller budgets and are more willing to train.