If the patient doesn’t want a root canal then the only option is extraction of tooth followed by crown and bridge, implant or removable partial denture for replacing the teeth which is extracted(removed).All of these treatments are not only expensive but also requires more time and additional treatment to adjacent tissues.
Success Rate of RCT : One review of a number of studies found 90% of root-treated teeth survived for 8-10 years. If you are lucky then it may last long for a life time.