I've had a single pin bent, they are tiny. The MB was unable to access a particular RAM slot because of it and I couldn't figure out why.
When I discovered it, I bent it back into shape but it was pretty tricky, the pins are really delicate and its a bit tough to know if its in the right spot. Can load it full of RAM now.
It depends on how many are bent. If its just a few and they are separated, it *might* be possible to restore it by aligning the bent pins with adjacent unbent ones. You can use a fine stainless steel plaster cutter but be delicate with it.