A critical review on the use of antimicrobials in dentistry. To provide a general overview of the use of antimicrobials in dentistry. The paper was divided into different topics, starting with an approach to understanding both commensal and pathogenic oral microbiota. Subsequently, emphasis was placed on the main categories of antibiotics used in dentistry (β-lactams, tetracyclines, macrolides, lincosamides, nitroimidazoles and quinolones), and the basis for their prescription. Finally, the implications between systemic diseases and the use of orally-administered antibiotics are presented. The study suggests that an adequate medical history can minimize the risk of systemic adverse effects, unwanted drug interactions, and allergies related to the use of antibiotics. In this regard, when facing a potential history of allergy to a particular group of antibiotics, the prescription of a different group is mandatory. In most indications, β-lactam antibiotics represent the first-choice in dentistry. Moreover, a short-term prescription of antibiotics when treating acute oral infections is recommended. The use should be extended for 2 to 3 days following the resolution of the infection, with an average duration of 6 days in order to prevent the development of antibiotic resistance. Oral infections should be managed with interventions aiming at the elimination/reduction of the associated pathogens. Furthermore, inadequate prescription of antibiotics can lead to potential risks to the patient such as allergy, adverse effects, and development of microbial resistance.
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