Hi '''Ghassan Salaam'''
If data is important, you should send it to recovery specialist in the first place and since you had open it up, i suggest to send to recover specialist for a free analyst.
it depends on how bad is the scratch.
if you are lucky you are able to recover much data else there might be partial lost of data or worst none.
and when you open the drive in non clean room, it will further contaminate your drive.
recovery in this case will not be cheap.