Yeah, i hate it when they say 'it's very rare, but...' i must be one rare breed of human if i count up the amount of times a doctor or dentist has said that to me in my lifetime. It could jut be that they are young, just out of dental school and read it in a text book. I just happen to be the first case they've come across. Anyway, got some jaw stretching to do......Lol.