Sleeping on a Pillow

The idea of a pillow and resting your head on something seems to be really deep in literature. I'm wondering about the effect of sleeping on pillows with your face down potentially or your head cocked to the side. Is that having an effect on malocclusion? Yeah, I would suggest that if you have a symmetric position where you routinely sleep, yes, it could have an effect. However, is one of those things where I don't have enough information and I'm sitting on the fence at the moment.