I've never heard of the OraVet, but I'm interested. I've been looking into trying some new preventative measures as Levi gets older. He's almost 4, and thankfully has not needed a dental yet. He just got his teeth checked last month and got a good checkup.
I do brush his teeth pretty regularly (probably every other day). We use the finger toothbrush (kind of like this:
Amazon.com: Petrodex Finger Toothbrush Dog and... ) and CET toothpaste (usually vanilla mint), and he does well with the tooth-brushing. He likes the taste of toothpaste, and he's gotten so used to the brushing that he doesn't fight it at all.