Logo critique: Dental lab (revamp)

[Ronald]

Happy New Year, everyone. You may remember the dental logo I was tweaking a few months back. The owner decided he wants a total logo revamp, so attached are some variations for your review. I started a new post to avoid confusion.

As usual, the client wants something simple and memorable like the Nike logo, but doesn't know exactly what. I felt like I had virtually no choice but to use a tooth visual. I like the dual-meaning of the dental implant/flaming torch. I also tried some science themes (atoms, molecules, etc.) to representing technology in a broad and fun way. Feedback would be appreciated.

They want to stick with royal blue with black and white/grey, but I went with a brighter cyan and a secondary light tint to freshen it up. I considered adding tangerine to compliment them, but it was tough adding orange to teeth.