I have created this designs for dental care. First one is final logo but I like second logo in left column. I want to know about your suggestion.

You made the right choice. It's a great logo!

I like the top left, and the one you mentioned right below that. These are very well designed, and I like their simplicity and clarity. The color scheme goes along with the subject matter as well (if that makes sense).

The one you already chose is the best one in my opinion. Its the most subtle and relevant one.

I like the top left one as well. I look how the abstract tooth kind've also looks like a heart. The only element I dislike on that one is the 'care' which is smaller and in an odd position.

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I like the top left and bottom left ones the best because the designs look like a tooth. I would play around with some more variations of those two designs.

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I'd have to agree that the first one is the best. The third and fourth didn't really appeal to me. I quite liked the last one, though.