Prevalence of Recurrent Aphthous Ulcers Among Dentistry Students' in Kabul, Afghanistan: A Questionnaire-Based Study.

Introduction: Recurrent aphthous stomatitis (RAS) is the mouth's most common and painful inflammatory ulcerative condition, also called aphthae or canker sores. Its prevalence is about 20% and predisposition factors involve genetics, environmental factors, and immune dysfunctions.

Objective: Reviewing the literature and no study was found to show the prevalence and associated factors of recurrent aphthous ulceration in the context of Afghanistan.