• Flávia Casale Abe, Cristiane de Cássia Bergamaschi, Mabel Fernandes Figueiró, and Luciane Cruz Lopes.
• Department of Pharmaceutical Sciences, University of Sorocaba, Sorocaba, State of São Paulo.
• Medicine (Baltimore). 2018 Nov 1; 97 (48): e13158e13158.

BackgroundAntimicrobial resistance is currently considered the main risk to global health. A variety of microbial species have been isolated from endodontic and periodontal infections. However, clinical endodontic and periodontics bacterial isolates have not been sufficiently characterized with regard to their capacity for antibiotic resistance. We aim to assess the existing evidence to estimate the prevalence of the main antimicrobial resistance and multidrug resistant organisms in endodontics and periodontics and to describe their geographic distribution in Latin America.MethodsAll types of designs and will be restricted to Latin American studies will be included in this systematic review. MEDLINE, Embase, CINAHL, BVS (LILACS, BBO - bvsalud.org), IBECS (bases.bireme.br), Google Scholar, Cochrane Central Register of Controlled Trials, and Web of Science databases will be searched from 2013 to December 31, 2018 for all types of study designs that report microbial infection in endodontics and periodontics and their resistance and that define the microbiological methods used to identify microorganisms. The selection of articles for inclusion will be performed by 2 reviewers using predefined eligibility criteria. The Cochrane and ROBINS-I risk of bias assessment tools will be used to assess the methodological quality of randomized control trials. The Newcastle-Ottawa scale will be used to assess the quality of methodology in observational studies. The overall quality of evidence will be assessed using Grading of Recommendations Assessment, Development and Evaluation (GRADE) using the same principles and domains applied in the quality assessment of prognostic studies. The heterogeneity of the findings will be assessed using both the χ test and the I statistic. Sensitivity analysis will be performed by subgroup analyses and meta-regression to investigate the effect of study-level characteristics, such as age, gender, and methodological quality score, whenever possible. Publication bias across studies will be evaluated by visual inspection of the funnel plots and Begg's test for the results covered in 10 or more studies.ResultsThe evidence derived by this study will inform best practices for patients with endodontic and periodontal problems receiving antimicrobial agents.ConclusionSuccessful completion will significantly impact clinical practice and contribute to improved prescribing competency.Protocol RegistrationPROSPERO-CRD42018077810.

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