Less antibiotic use in dentistry gave no increase in endocarditis
Sweden is one of the few countries that have removed the dental health recommendation to give prophylactic antibiotics to people at a higher risk of infection of the heart valves, so-called infective endocarditis. Since the recommendation was removed in 2012, there has been no increase in this disease, a registry study from Karolinska Institutet published in the journal Clinical Infectious Diseases shows.
Infective endocarditis is a rare but life-threatening disease caused by bacterial infection of the heart valves that affects some 500 people a year in Sweden. Individuals with congenital heart disease, prosthetic heart valves or previous endocarditis are at higher risk of infection.
People at a higher risk of infective endocarditis in Sweden used to receive the antibiotic amoxicillin as a prophylactic ahead of certain dental procedures, such as tooth extraction, tartar scraping and surgery. This recommendation was lifted due to a lack of evidence that the treatment was necessary and to help prevent antibiotic resistance by reducing antibiotic use. A collaborative project involving researchers from Karolinska Institutet has now studied how the decision has affected the incidence of infective endocarditis.
Niko Vähäsarja, the study’s corresponding author, said: “We can only see small, statistically non-significant variations in morbidity, nothing that indicates a rise in this infection in the risk group since 2012. Our study therefore supports the change in recommendation”.
After the change in recommendation in 2012, prescriptions of amoxicillin in dentistry declined by approximately 40%. However, the study is unable to demonstrate that this was an effect of the amended recommendation and amoxicillin has other uses in dental medicine.