My first recession "cavity"

I saw an ad for $1 teeth whitening and I was intrigued. I got on their web site and then yelped them. Seemed they had good reviews so I made an appointment. They are electronic online reservations which I liked. I show up the day of my appointment and they are very very nice. It's a tiny place the size of my apartment probably smaller. A guy comes out of the exam room to take my chart. Intern I think. I go get fitted plastered for whitening trays and then they call me into the exam room. And the intern is my dentist. He examines my teeth and xrays and informs me I have a cavity. What?!?, I said" the last time I had a cavity was like 7th grade."

I've been getting my teeth cleaned by this guy in soho for the last 3 years and he's never even mentioned any thing that even resembled a cavity. In fact the hygentist often comments that I have perfect teeth. Perfect. So you can imagine my surprise. I come from a long line of dental hygenists and I'm pretty sure they would have even mentioned I had a cavity over Easter.

I had the guy show me it in the xray. But he said it was on the surface you can't see it. Then I had him point it out in a mirror. Nothing.

So my 1$ whitening turned into a 144 dollar "cavity." Ug.

Oh and ps the intern just happened to have time in his schedule to fill it. Today. Right now. Cash or check?