Can I use bone-cement to reshape my skull?

First im sorry if my english isnt so good i hope i can make myself clear. iv a very odd skull shape. n its been bothering me since i was a kid.. i heard i can fix that using the bone-cement (also heard that silicone can be used) .. my question is how dangerous this operation is? looks like a common surgery in Korea but i dont want to go there. can i 'reshape' (if thats the right word) my skull shape at least a little? does it work? is it an easy operation? asked some clinic in korea n they told me it is