Hi Jill, I think all porcelain/ceramics contain aluminium and even many composites too I hear. I do not know how bad this is considering it is already contained in baking powder, cheese and other things we take in.

Andy Cutler who is well up on toxicity does not feel it is an issue and I doubt he would be like the ADA <img src="/ubbthreads/images/graemlins/wink.gif" alt="" /> If anything, he's angry with the lies they have told and cover ups and seeks to expose them when he can. But here is some comment he made to someone's concern over aluminium in porcelain - http://onibasu.com/archives/am/2014.html

He may not be fully right, I do not know. It seems people have different reactions to many things and maybe it is to do with total body load. perhaps if someone is not getting much other exposure, they will do ok. And to do with whether the aluminium is readily coming out of the dental materials and whether there is other metals in teh mouth at the sametime. Im sure many things come into it. Like some people complain they've been poisoned by aluminium, but fail to realise that if they may have gotten the porcelain with a metal base! That can be the culprit, not the porcelain. Also the galvanic reactions between differing metals in the same mouth cause far more issues than one main metal. Like me with braces at age 15, that is when things in my health fell apart, it was the "trigger".

Here is a link on the aluminium contained in the ceramic
http://www.vident.com/general.php?id_pages=205