@tisme Oh, I get you meant now! I just wasn’t on the same brainwave and misunderstood your question. Sorry about that. Ok, if your dentist is suggesting removal of teeth that have failed root canals there is a matter of replacement. It’s advisable to replace the teeth in order to maintain a proper bite. Let me discuss replacements first and then your question about bruxism or TMJ issues.

Options for replacement teeth are:
~Implants which would require an anchor placed into the bone where the tooth was lost, followed by the replacement teeth which are fixed to that anchor. They would tend to feel like your own teeth.

~Bridges are replacement teeth (crowns) which would span the gap between missing teeth. They usual require an anchor tooth on either side. Bridges are also fixed (cemented) in place so they would also feel most like your own teeth.

~Partial dentures are made from an acrylic base or nylon thermoplastic to look like natural gums, with teeth (acrylic or porcelain) imbedded in the plastic. They often have little metal attachments to help clip to the abutting teeth to hold them in place. They are removable and it’s recommended to removed the partial night. They can take a little getting used to as it is plastic and fits over the jaw, either upper or lower depending on where the teeth have been removed. Because they’re removable they won’t feel like your own teeth but most people eat just fine with them in place.

As for TMJ issues and bruxism, some of symptoms you’re experiencing may be caused by stress, your bite if it’s not articulated, etc.. A dentist can easily check this out by using a blue carbon paper called articulating paper to check the evenness of your bite.
I think your question is that if you have your teeth replaced with one of the options above, if you continue to grind your teeth what will happen. Basically the same thing you’re experiencing now. Though it is possible the replacement option will help you out in the long run. You can also wear night guards with crowns/bridges or implants.

I’m really sorry you don’t seem to be able to find a dentist you feel comfortable seeing. Having worked in the dental field over 30 years, dentist aren’t likely to talk to each other about a patient to discourage your business. They’re competitors. So basically if you’re getting the same diagnosis from a couple of dentists then their professional opinions are consistent and in agreement.

I hope I answered your questions. Did you find this helpful?