I had my dental bridge in 2012 and without any problem for almost 15 years. Last week I started having sensitivity in the last abutment tooth. I went to the dentist after 3 days and he removed my bridge to examine and took x-rays. Told me there was no visible problem. He applied desensitising agent on my abutment tooth and leave it for 24 hours to observe. There was no issue for 24 hours so he re-cemented it back. Now after few hours of re-cementing. I have mild pain and sensitivity lasting for 3 days now. Please tell me what to do. My dentist suggested me RCT in the abutment tooth if the problem does not resolve.