I have moderate-severe bruxism wear on my teeth. 35yo, been using a night guard since I was probably 18. I drink occasionally, non smoker. I do drink coffee every day. I have two crowns on 18 and 19. I first got crowns on these teeth 3 years ago (and root canals), and they were wayyy too high but my dentist kind of shamed me into just accepting it (I'm still really upset about this and I know I should've pushed it harder, so please don't give me shit about it.) I went to another dentist and even the second dentist told me it was fine and didn't need adjusting. I think the problem was that since they were both too high at the same time, they couldn't tell with the bite paper and just didn't believe me. It've had constant headaches and pain and discomfort for the three years from the crowns being too high. Now I live in another state, and I had to get one of them replaced (18) because I couldn't floss between them anymore (presumably from the pressure from them being too high). I know the color is too light, oh well. I was gonna work on bleaching the rest to match. Finally my current dentist takes me seriously, and she adjusts the hell out of 19 , but tells me she doesn't know how thick it is and doesn't want to make a hole in it, and I should get it replaced if I need it adjusted more. So I got the crown on 19 removed, and I currently have a temporary waiting for the permanent, but I started reading about crown materials and I read that emax crowns are contraindicated for bruxism, which is what she was planning on putting on #19. I asked her about it, and she said she wanted to use emax because my remaining tooth is so short that it's better so it can bond better. I've been reading about crown materials and now I wish I had been offered gold crowns, because I definitely would have gotten them because they seem better for bruxism. She said I could get gold on #19, but to me that seems like it'll be a problem since #18 is a zirconia crown (correct me if I'm wrong about this assumption but I would think the zirconia would wear away the gold, and/or the combo would cause awkward uneven wear on the top teeth). Was zirconia the wrong choice for #18? What would you do in my situation? Should I get gold for 19, and get 18 redone for the second time in gold? Or should I just accept the zirconia for 18? If I accept the zirconia for 18, what's the best option for 19? I worry since I already have a lot of tooth sensitivity and wear on the opposing teeth. I worry about the risk that either emax and/or zirconia will grind down my remaining teeth faster. Thanks for the help 

Are zirconia and emax crowns appropriate for 18 and 19 molars with severe bruxism?