My siemens oven door came off!?

The door of my Siemens oven (HB13 M.50B; EN number: hb13m550b/10) came unhinged on one side yesterday when I was cleaning the oven. We managed to remove the whole door but, although the hinges look OK they are quite rigid, and we can't get the door to fit back in again, so it may be that one of the hinges got bent in the process. Is the solution to buy new hinges and refit? Or is there something we're overlooking?