Well How The H*** Did That happen. but anyway it seems you need a new Shell. the shell is the Housing(the shell that protects and keeps the Screen and contacts inside from falling out. go on ebay and look up a Replacement Shell and pick the color you want. (Depending on the color you pick it should only cost you less than $13.00, depending on which color shell you pick)pick the one that comes with the Screw to open it up with. and the good thing about this is that you can pick the Color you want,and the Shell is brand new so it has no scratches on it. so now it's like you got a new DS(on the outside).
Emmanuel
April 2011