Is there ever a need to place an amalgam filling in the lingual fossa of a later incisor which is a pontic because this was done for me by my dentist when I complained of pain in that area?

Also I was told by another dentist that i would have to remove my bridge to get to the root of my pain problem in the area of my bridge as nothing came up on the x-ray. If I was to have my bridge removed, considering my abutment teeth on either side have had enamel removed in preparation for my first bridge, would it be possible to use them for anchoring teeth if a new bridge was to be placed?

Thank you in advance for your help. It is highly appreciated.