I like entry #4 because it looks like a smart phone icon and blends the traditional with technology. I love the hidden tooth. It is edgy in general. Could you play around with the colors of our practice name? I like the current but worry about the family dentistry part being too faded for ads etc.
I obviously like entry 10, 11 and 4 just not the yellow and faint coloring of second line of font. I re-ranked because i didn't mean to say they were uninteresting.
I still like your original icons without the windows. Could the design with the icon at the left be sized a bit smaller where the top of it and the bottom of it are in line with the practice name?