The dental office can be very tricky and sneaky.

Do not be fooled by their smiling faces. You have to really pay attention to your bill. I learned it from my personal experience. Sorry, other than posting this comment, i have not other suggestions. It is not a big money anyway.Hopefully some people reading this post. Smiling face in business makes everybody feel good, but one has to remember business is business. Do not be fooled by those smiling faces.