Front Wheel Resitance

well, had my biggest off so far at the weekend, lost the rear end (don't know how) at the top of third, next thing i know on the floor sliding along for what seemed an eternity, destroyed my handle bars and escaped with just a few aches and bruises. anyway, ive noticed my front wheel has some resistance in it when i spin it by hand, i put a new set of bars on and straightened out he bar mounts, front wheel isnt buckled, isit possible i have twisted the forks? and if so how do i go about un twisting them? thanks