I can only share my own experience. With a mouth full of mercury fillings and crowns over mercury fillings over root canals, I discovered that much dentistry involves putting things in your mouth and/or leaving things in your mouth that aren't really healthy. This could go a long way to explaining some chronic health problems I've endured for a long time. Long story short, I had a dental implant. At every visit to my dentist of 30 years (the one who referred me for the implant), said it was perfect. Indeed, it felt ok, or so I thought. A few years ago in the interest of cleaning up my mouth, I had the implant removed. I saw it when my (new) dentist took it out; the metal part looked rusty! I asked why it was rusty (I'm an engineer; I ask a lot of questions). He answered that it was galvanized, not rusty, as a reaction to being in my mouth with all the other metal and saliva. So while the implant seemed to be a great thing, it wasn't as good as it looked. I had a battery going on in my head...no wonder I had health problems.
This probably wouldn't be a problem if you don't have any different metals in your mouth, i.e, if you had all the implants done with the same metal and didn't have any other metal fillings or bridges or retainers in your mouth.
Unfortunately, I don't know of any great alternatives for missing teeth. I have a flexible partial (for upper molars); it works but it is not great. I have read about zirconium implants, but it doesn't seem as if many do them, they are also expensive and some note it is still sticking something "foreign" in your body possibly setting up an immune reaction.
My even-newer dentist says there is nothing natural about dentistry...it is all a question of what the person's goals are and how much toxicity they are willing to deal with. I suppose the "natural way" would be to let them decay away till they fell out and just be toothless, but that's pretty toxic, too!
One more thing. One friend of mine and the wife of another friend each tried to get an implant. Both "failed" because they were smokers. Both were warned that might happen. So if you're a smoker and you're not going to quit
I wouldn't even try it...too expensive and painful for a failure.
Good luck in your journey.