ENDODONTIC EPIDEMIOLOGY AND TREATMENT OUTCOME: GENERAL CONSIDERATIONS

Epidemiology may be divided in a descriptive and an analytical part. The former is applied in order to gain knowledge about distribution and prevalence of a specific disease, in this case apical periodontitis, while the latter focuses on factors that may be associated with the disease. Cross-sectional studies are used primarily for descriptive purposes, while cohort and case/control studies are suited for disclosing disease determinants and etiologic factors (Fig.1).

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