Brian,
Test your crowns for lead and you will find that the crowns that you are sending to your DRS have LEAD in them. Just call any porcelain manufacturer and ask them if they have tested their raw materials or better yet get your crowns TESTED FOR LEAD. Two glasses of water will put more lead in your body than any crown will in a lifetime. Please let me know your results and relax as we are local too. No more ZIPPERHEAD comments, no more fooling around, just the pure nitty gritty and the one that wanted to pop my head off is more than welcome to try. By the way, our crowns were recently tested.
Papa Bob/CDT/BMF
