While it was temporary cemented and good fitting, I was capable eating on it, but an extra temporary cement made my gum to reseed, so the dentist had to add an extra ceramic layer at the marginal site to cover the root, but then my bite changed and also, since then I've been experiencing pressure pain on the corrected tooth. It is not because of inflamed pulp, neither it is the gum, so is it possible that the bridge is not fitting properly now and is this correctable now?
It sounds like you have a lot going on there, and it was a little bit difficult to follow; but hopefully I can answer your question. Once a bridge is cemented, it can't be removed without destroying it. I'm not saying it's impossible, or has never been done, but in most cases if the bridge needs to be removed, a new one would need to be made. That said, it can't really be modified (fit or structure wise) while it is in your mouth. I know you said that you didn't have a pulpal problem, but if you do end up needing a root canal, that can be done through the bridge. On the other hand, it the bridge isn't fitting right, maybe it should just be redone.