I was a dental assistant and it gave me a wealth of knowledge about dentistry. Not just the numbers and names of the teeth, how to prep for a crown, etc. But the monetary aspect of the business. How to handly insurance, how to create continuing care, and how to interact with uncomfortable patients. I really have a great understanding about how a private practice runs, and that will REALLY help once I graduate.
My advice would be to suck it up and be an assistant.