Mike, 
      A while ago you researched on alternative braces for your child without 
nickel. I wondered what you found. My son's tested highly allergic to nickel 
and aluminum of which metal and clear braces are made of. All ortho's use 
those metals exclusively here and all insist on a full panaoramic of upper and 
lower and a cephalogram of the head with repeated X-rays for monitoring 
progress. 
This radiation exposure to developing childrens heads and brains concerns me 
as does the heavy metal exposure. They both   need work done with crowding and 
another challenge will be not pulling teeth. Let me know what you found and 
any avenues to pursue. There seems to be no holistic orthodontists as there are 
dentists in this country. Thanks, Georgia