What's a Dental Instruments Assistant in USA?

That's what the dentist's assistant did... They help dentists or special dentists. They also clean rooms and disinfect equipment. The salary is good (better than being a receptionist at some point), and most dentists offer benefits such as health insurance, which is a full-time assistant. However, you can't create your own time. Most assistants work hours per day. Usually from Monday to Friday morning at 8 o 'clock to 5 o 'clock in the afternoon, but now many dental clinics and days open on Saturday, so you may have to work in a couple of Saturday and night of the week. You can work part-time or full-time, but usually only to a full-time assistant. As an assistant, you don't need any training. If you find a job Posting saying "train the right person," then you can apply for the job.
However, if you are certified as an assistant, it will make you more marketable. I suggest you take a dental assistant certificate course at a local community college.
If you ask a dental hygienist who is completely different from the dental assistant. The assistants can train at work, sit next to the dentist and hand him some instruments. Health workers, on the other hand, are nurses in the dental field (formerly known as dental nurses in the United States). A hygienist who works directly on a patient's teeth will require two or four years (or degrees) in a college degree in oral health. The DH project is very competitive and difficult to complete, just like an RN care program. Although there are not many open positions in the United States at the moment, it is not currently available in the United States. But in the United States, there are always some open Spaces.