What is the average cost for removing a dental implant?

I can't really tell from the photo, but if the white material is hard to the touch it is most likely a piece of bone graft material. The more important question is whether there is a fistula, which is a track that originates from a point of infection out into the mouth for drainage. Please see...

Your dentist is correct, over time you will get some bone resorption and if you were ever to proceed with an implant you may have to regraft it. 

This will be an extremely rare case that I have not come across before whereas dental filler area might be affected by a dental implant procedure including a sinus lift though of course a possibility of an infection always exists. Plus considering the time that has elapsed since you had...

The cost for implants vary depending where you are living at. You can compare pricing in different dental clinics around your area. Here in Mexico implants run from nine hundred to one thousand five hundred dollars each implant.  

As your Xray is not visible properly, so it's my request to upload a digital x-ray copy[not clicked one], so I can guide you better. But I feel there is not enough bone for the implants, so you have to go under implant surgery followed by a bone grafting procedure.

Since you had permanent porcelain crown after a root canal therapy, what you see as far as length and width,  is what will be! If you feel the tooth is shorter and longer, it will not move, so if you have any concern that it does not look right to you, contact your dentist to...