Thanks Sarah. I thought it must have been. It sounds like a much nicer alternative to traditional braces. I also like that you can take them out to clean and floss properly, and that there are no wires. When I was at school I had an expander thing (wire frame thingy on the inner side of my teeth pushing outward). I got so many ulcers from getting my tongue stuck in the wires and having to pull it free - ouch!!.