Yes, yes, and yes.
I think most pain meds (and probably many others) contribute to tooth rot/decay/crumbling loss.
I fought by spending tens of thousands of dollars trying to save my teeth, all out of denial that I could "fix" this or it couldn't be the meds.
Well, yeah, no.
So at 40 (ten years ago) I got dentures.
It's totally worth it. No one knows I have them (I mean unless I tell them), they just think that I have nice teeth.
I can eat again without crumbling teeth falling apart, without pain and agony, and for me, I was so embarrassed by what my mouth looked like, I wouldn't smile, I'd talk with my hand over my mouth.
I am not on methadone (except that one time by accident), but I've been a CP patient for decades, treated in a multitude of ways, but narcotics have been the only things that has been effective.
I chose (and hope I can continue to) maintain this method of relief. I've had way too many allergic reactions (and a few "sensitivities") to other meds, that I'm not eager to try anything new and break a system that's been working quite well for me.
Dentures are not only great (they're easy to clean, you can choose your teeth, you can have beautiful teeth), IF THEY ARE MADE PROPERLY no one can tell you're wearing them.
And steer clear of implants because with our meds, we'd be setting ourselves up for greater and extremely expensive problems.
Plus without all the rotting teeth, your mouth, and your heart, are healthier. All that decay is very damaging to your system!