Theoretical and Practical Knowledge Regarding Infective Endocarditis Prevention Among Dentists and Physicians: A Questionnaire-Based Survey

Infective endocarditis (IE) is a rare but potentially life-threatening infection, often triggered by invasive procedures, dental or otherwise, in at-risk individuals. This study aimed to assess the knowledge of IE prophylaxis among healthcare professionals, focusing on dentists and physicians. Two validated, anonymous questionnaires were emailed to 27,000 healthcare providers in the province of Milan (Italy). A total of 970 responses were collected (response rate just over 3%), with 49.2% from physicians and 50.8% from dentists. No significant differences were found between the two groups regarding years of experience or guideline usage (p > 0.05), although more physicians (12.7%) than dentists (6.7%) reported unfamiliarity with any guidelines. Physicians often misclassified the risk associated with certain cardiac conditions and overprescribed prophylaxis for low-risk procedures, with overall accuracy falling below the expected performance benchmark (H₀: 58.0% ± 2.0%). Dentists showed a better understanding of high-risk dental procedures, yet performance remained suboptimal, with multiple scores below the expected benchmark (H₀: 68.0% ± 2.0%). These findings highlight widespread knowledge gaps and inconsistent adherence to IE prophylaxis guidelines. The results align with international observations and emphasize the urgent need for continuing education and improved dissemination of evidence-based recommendations across medical and dental settings.