RESUMEN
The aim of the present study was to compare hematologic problems in patients with recurrent aphthous stomatitis, with a control group. In this cross sectional study, 30 subjects with recurrent aphthous stomatitis and 30 healthy individuals were included as the case and control groups, respectively. After diagnosis was established a 10 ml sample of the subjects' blood was used to determine serum levels of iron, ferritin, vitamin B12, folic acid and zinc in each subject. Independent t-test was used to analyze data. The average serum iron, serum ferritin, vitamin B12, folic acid and serum zinc levels in the case and control groups were assessment, demonstrating no statistically significant differences between the two groups [p>0.05]. According to the results of the present study, hematologic deficiencies cannot play a role in etiology of aphthous stomatitis