Extraction is the last option these days,try to save it by doing re RCT,even if u do remove that teeth u may have to replace it with the help of bridge or implant which is far more costly than doing a re RCT..
Next Steps
meet a good endodontist and tak his opinion,If he s telling that it can't be saved then go fr extraction and go for replacement procedures
Health Tips
try to save it, natural teeth are for life time...