I think the only options for this is a partial denture, a bridge ( http://www.webmd.com/oral-health/dental-health-bridges
) or implants. ( The root canal sealers are also toxic and can cause similar symptoms.)

Locate a biological or holistic dentist and have an oral surgeon remove them they need to do a cavitation as you know to contain the infection that is grind down 1mm to the bone and they usually will put you on Antibiotics for three days I skipped that and just used silver, parabiotica and Grapefruits seed extract and did oil pullingwith black cumin oil, oregano oil and thyme oil and sprayed the area with Argentyne 23 silver . 2nd Decide what you want an implant the ceramic or titanuim my friend just left her open gap I ....my dentist says this can cause issues with the jaw . My doctor who is super cool and progressive told me to get a Clifford test which will check if I'm allergic to chemical used in fillings crowns, that way you can make the best choice. root canals for some can really wreak havoc on your body ...your life