I'm strongly considering having 10 porcelain veneers/crowns done on my
uppper and lower  front teeth due to significant discolorataion and
root canals. My concern is that I've got inflammatory systemic
condition that potentially could be worsened by chemical sensitivities
and obviously you can't reverse the procedure once you have it done.

I was hoping to get some input on the above and also ask -

- Might there be safer alternate routes?

- Porcelain seems to be relatively safe but I'm wondering if there are
safer (less chemical) bonding agents than others?

Thanks for any thoughts!