الفهرس 
AcknowledgementOnly 14 pages are availabe for public view
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Abstract
Recurrent aphthous stomatitis (RAS) is one of the most common oral mucosa diseases. It affects 5–25% of the population, with a predominance among women (particularly in the second and third decades of life). The condition is chronic and self-limiting in immunocompetent patients. It is characterised by recurrent onsets of shallow, clearly defined, round (or oval) and painful erosions (or ulcers) surrounded by an erythematous halo. Aphthous lesions are likely to occur on non-keratinized, non-attached oral mucosa. Some studies stated that vitamin D deficiency predispose to ulcerations in cases of ulcerative colitis.
This study was done on 40 cases diagnosed as aphthous ulcer and 20 healthy persons as a control group. we studied vitamin D and iron levels in the two groups to discover if there is relationship between vitamin D level (deficiency or insufficiency) and iron deficiency and the occurance of aphthous ulcer.
This study showed that vitamin D deficiency, insufficiency is insignificant in cases suffering from aphthous ulcer than normal controls. Also the results of study of iron level showed no statistically significant differnce between both groups.
There was some limitation in this study in the number of cases and controls because the used kits are expensive.