Very Nice! We like it alot. The thing that pops out at us is that there are no dental identifiers. I can't think of how to tell you to incorporate this, be it an artistic toothbrush, etc. I will tell you that the characters that look like a molar aren't what I'm looking for. In dentistry, they are used a lot, but as dentists we think they send the wrong message, that of an extracted tooth, when we're in the business of saving teeth :)
I look forward to your artistic changes to make this a top contender. Thank you very much.