Is it normal to have jaw pain and remodelling after years of bruxism?

Yes: Bruxism leads to wear and tear on the muscles, tendons and ligaments. Like people with age related hip and knee pain, the jaw can also degenerate.

Yes but not good: Yes it is normal if you have been bruxing and not protecting you teeth to have remodeling and potential jaw pain. However you should see your dentist to try to stop the damage and try to help with the jaw pain. Night guards can help along with tmd appliances. See your dentist.

DEFINITELY: Bruxism can cause a shift in your bite and movement of the teeth. Teeth wear down and break, which also can lead to additional problems. See a dentist/tmj specialist asap. The longer you wait, it may become irreversible and more painful.

Yes: Yes... the attachments of the masseter muscle to the lower jaw become larger with time. Giving your a squarer jaw look. The pain is either in the muscles or the jaw joint. See a TMJ expert for treatment.