There is no such thing as a dental nurse. A nurse can work in an orthodontist office, but dental techs are the "dental nurses" you speak of. There is such a thing as a dental nurse, but the correct term is dental assistant. A dental Tech is something completely different. (A tech works in a lab and makes appliances and false teeth etc) You do not need any special qualifications to be a dental nurse but it is handy to know Biology. Everything you need to know will be covered in the course.
Science
Well, would you want your nurse not having the proper education to take care of you?
Yes, you need a Dental Hygienists license or a Dental License to "clean" teeth. Most states require at least an Associate in Science Degree in Dental Hygiene.
According to a google search you really need to concentrate on your science, and math courses.
you need to major in science of nursing
Yes. You have to know the anatomy of the patient's mouth. Anatomy is a form of science. In addition to science, you need to use math as well.
You need a masters in economics and science aswell as having a degree in cheesecake psychology.
You must obtain a BSN - Bachelors of Science in Nursing.
four years of college with a science degree, then dental school for four years with an intership
After getting a BA/BS in some area of science you need to go to dental school.
you have to be kind and like working with people you need to be familiar with anatomy and Physiology and you need to be able to stay calm during a crisis.
usually 5 gcses above C grade including maths English science,