iTunes devices headache

Hello

I currently have an iPad, 2 iPods Nano's and 1 iPod touch. At the moment I am going to wipe the hard drive on my Macbook and start a fresh and install the newest OSX so i will loose my iTunes. I have backed my iTunes library up and once i have completed all of the OSX installing i will put the old library back in. My question is that will i need to do anything to make the devices think it is still the same library. I have seen lots of posts about moving your library to a new computer but becuase its the same computer but with a wiped hard drive i'm not sure if its going to change anything