<prompt> Human: I went to a dentist for a free X-ray. While I was there, they claimed I had a number of cavities and a bacterial infection eating my teeth. They said the cost to cover this is 3300. After a couple of days they sent me an email saying they could do it for 25 off. I do not have dental insurance and am wondering how to proceed. I am thinking about getting a second opinion from another dentist. I was also considering getting dental insurance. Any thoughts? I am in the US on a work visa.  <response>: Second opinion. Nothing comes free. The free x-ray was a way to drum up business. 