You have to go back to the uni if you want to do stuff inside a
patient's mouth, even something as simple as a scale & polish.
Hygienist and therapist courses are 2-3 years studying.
If you want to limit yourself to the duties of a dental nurse (eg
aspiration, mixing stugg, infection control etc) you will have to hold
a registrable qualification. The easiest to do will probably be to pass
the national certificate for dental nursing - contact the national
examining board for dental nursing.
Dental nursing salaries are traditionally poor, like most nursing jobs.
Depending on the practice, you can expect anything from basic wage to
maybe 21,000 a year. Hygienists and therapists command higher salaries,
maybe as much as 30,000 to 40,000 a year.
Regards,
George