Has your deep concern and anxiety abated or were the comments that were left for you unread?
My dentist insists on Amoxicillin before treatment. Last year I had an undiagnosed infected lower molar which may have contributed to the need for mitral valve repair.
Antibiotic prophylaxis is no longer indicated in patients with mitral valve prolapse for prevention of infective endocarditis. The risk of antibiotic-associated adverse effects exceeds the benefit (if any) from prophylactic antibiotic therapy.
For infective endocarditis prophylaxis, current guidelines support premedication for only a relatively small subset of patients: history of prosthetic heart valve or past valve repair with prosthetic materials; prior infective endocarditis; unrepaired cyanotic congenital heart disease, including palliative shunts and conduits; repaired congenital heart defect with residual shunts or valvular regurgitation at the site of or adjacent to the site of a prosthetic patch or a prosthetic device.