Is there a way to fix a kink on the edge of a sword?

My younger brother got a hold of my replica of the sword used by Morpheus in the second Matrix movie. The sword is a fully functional steel katana and unfortunately he decided to use the edge against the edge of a decoration sword while playing with an other young friend. Fortunately I got there on time to prevent any one from getting hurt but now there is a kink on the edge. I have been thinking that perhaps a sharpening stone will help diminish the kink but I am not sure if that is a good idea or if there is any other way to fix it. I use my swords mainly for decoration and I never had this problem before. Any help will be greatly appreciated as it is one of my favorite swords.