If the can is dented and it's not just damage to the wrap, recycle it.
Looks like a Samsung 26F, an ICR. I wouldn't take any chances with that chemistry of cell. Ditch it and replace with a safer chemistry IMR or INR. You may not need the current handling ability, but the extra safety they offer is still worthwhile.
Check out the Samsung 30Q. It's a 15A cell at 3000mAh, so safer, higher drain and more capacity.