Hello Dear Thanks for your query. First of all be relaxed, I will be most happy if I could help you out. Gone through your query, it really sounds very unusual that the fracture didn t heal in 5 year even after placing the plate. the offendin tooth/teeth should be treated to treat the infection. And the doctors also told you about the complications of extracting the teeth. If there is any expected complication, the tooth/teeth can be managed under general anesthesia. Coming towards the recent symptoms he is experiencing, see in fewer case oral infection travels to the heart valves grows there and causes sub acute bacterial endocarditis(SABE).Common symptoms are • Fever & Chills • anorexia, weight loss, malaise, headache, myalgias, night sweats, shortness of breath, cough, or joint pains. But other causes for these symptoms can t be ignored. So I advice you to get an appointment with the specialist dentist (oral surgeon) as well as with your cadiologist as soon as possible so that he/she can diagnose the exact problem clinically + radiographically .. and start the needful treatment. For symptomatic relief from fever he can take paracetamol-500 mg tablet thrice daily as soon as he gets an appointment with the dentist. Hoping tha you get appointment within a day or two. Hope this will help you. If there is any more query or question regarding this in your mind, you are always welcome. Take Care Regards