YellowD - in the deadlift you lift with your legs, I believe you are thinking of the stiff legged version which is not nearly as effective. The powerlift version is inititated w/ legs and they remain involved for nearly the entire movement.
This is the movement you train so that you don't get injured. Squats can twist also. It's all a matter of proper form and being careful. The reason people get injured is that there is no way to really cheat this lift - other than bouncing the bar on reps. People allow their form to breakdown because they haven't trained the lift correctly to build the full body strength necessary.
As far as injury - I've seen some nasty videos of benchers being crushed. It has yet to even phase the bench lovers. Put in the effort on the deadlift and you will love the results.