Welcome to Nikonians! Sorry to hear of your accident. If the damage was limited to the mount on your 18-55mm, the camera should work as long as you removed all of the parts from the camera mount. Since another lens doesn't work, I suspect that there was damage to the lens mount on the camera or inside the camera body as well. It sounds like both the camera and lens requires a trip to Nikon Service or a Nikon Authorized Repair Station. Good luck and Enjoy your Nikons!