How can I repair a crack/gouge in a hardwood floor?

We just finished installing all new pre-finished maple hardwood floors in our kitchen and dining room. They look absolutely beautiful, but we have a slight problem. While we were moving our appliance back into the kitchen, we accidentally caused a crack in one of the wood planks and gouged/dented a few areas. We used an appliance dolly to move the appliances back, so this must have happened as we were unloading the refrigerator to put it back in its place. We have wood putty, but I know that this probably won't fix the crack or the gouges. Please help!!!! We have plenty of wood leftover, but we really don't want to have to rip up those planks and install all new ones!