i would never use a case like that personally because i know the out come would happen like you have i will only use otter box so if it drops on the floor i wont have to worry about the iPad it would be fine.i am no telling you what to do here but have a look in to otter box cases because it would save you a lot of money in the future if it ever comes around again and you need a new screen the otter box case would be a lot more cheaper then replacing a new screen.i have dropped my a few times and it looks as good as new not a mark on it at all really.
http://www.otterbox.com/ipad-4-with...d-4-with-retina-display-cases,default,sc.html
i cannot recommend otter box enough personally its saved my wallet a few times.