It depends on what you mean by dent:
If as you look head on (apply directly to your forehead) at the edge of the blade and there is a little "squiggly" then you might be able to bend it back by using some pliers. You will however run the risk of fatigueing the metal and having that little piece chip off in the futire, creating another wonderful little serration.
If however it's just a little divot in the edge then all you have to do is grind it out.
Either way I would suggest a little time with a sharpener, that's likely your best option.