Hello! According to x-ray there is infection, RE-RCT can be initiated only if the tooth structure is sound and healthy, if not extraction followed by implants is the other option

A re rct can be helpful but a clinical examination is a must. Removal and implant can be considered only if the tooth needs to be removed.

Hello The tooth was not removed, but the post and core were placed We have to get the new one done as there is some infection

this seems like a post and core with a cap(crown) on top. we first need to assess if the cap merits removal. when that is confirmed only then can the next process be discussed. New implant may or may not be necessary. please understand an implant is root analog and is a significantly different process that has happened in this case

I can offer general advice here, a proper diagnosis often requires a more thorough evaluation. The recommendation to remove the existing implant and place a new one with a removable temporary cap is one possible approach (usually up to 3mos till implant is ready to receive permanent cap), often indicated by issues like infection or implant failure. Alternative options might include addressing the existing restoration (if feasible), different implant techniques, a fixed temporary restoration (depending on the situation), dental bridge (involving adjacent teeth), or a removable partial denture(to be removed every night) 

Hi, There is infection. Is is the tooth shaking?