One of my dreams is that the tooth regeneration tool using ultrasound therapy is made as a product for purchase. :)
It's a bit of creative google-fu that is needed, but try looking up old people who regrow their teeth at around age 50-60, and I think I can try and tell the story here about the canadians who made a sonic inducer for getting neural tooth roots to regrow teeth. Basically you induce a gentle mircofracture around the root of the nerve, where tooth growth happens in a baby, to pull stem cells to the location. You combine that with a high-nutrient diet and the right nutrients, and use 20 mins a day with the ultrasound oral device aimed at the gums/root locations, for about 6-8 months, and hoowee, teef!
I have.. those exact challenges you mention. At least two of my remaining back molars are crowns, I have two gaps where other molars are gone.
The opinions about the evils of metallic dentistry are in the articles and other info.. uh.. spread about the CZ mess. The dental solutions a person chooses are really a very personal subject though, and in truth, the best choices are going to be made towards quality-of-life, between the patient and his or her bio-dentist, ideally.
There are materials out there which are at least decently benign to the body, they're called 'bio-identical' by the companies that sell them, but in all honesty, nothing's quite so good as what the body makes itself.
One of the people I've seen in correspondance has taken on a PFO implant for a heart defect, and she takes higher amounts of C and a certain B-vitamin to counteract whatever leakages there are from that. I suppose there are ways to compensate for the technological aides we end up having to accept...
... I think what is important at the end of the day is a peace and a calm. For me, after an amputated hand, open-chest surgery at age 21 and the type 1 diabetes, I find a certain delight in that I have life in the life after this one is done.