If the problem is diagnosed as irreversible nerve damage or non-vital, then the most economical and fastest treatment is extraction (about 800 - 1800 baht) with no replacement(at age 65). If having a space bothers you, then root canal treatment (14-18000) followed by possible post and core (5-8000) and a crown (15-25000) is recommended. Alternatively, extraction followed by a single tooth implant(not transplant) may be possible depending on remaining bone and soft tissue health and anatomy, at an estimated cost of 20000 baht plus a crown. Use of some type of partial denture (4-20000 depending upon material and design) to replace the missing tooth can be done but is generally not well tolerated.