dallas I am looking for that same answer myself. My son is due to have his braces removed in April, maybe May. I do not want him to have any metal or mercuy based products put in his mouth after the "tin" is removed.

If you find out something safe to use, please let me know. The current orthodontist is removing the braces only. He puts a metal bar in their mouth that stays there permanently and he's told us this is safe and the absolute best, there is nothing else offered. So we'll be going somewhere else for another option.

If I find anything out, I'll let you know.