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Classification of recurrent aphthous stomatitis
| Simple Aphthosis | Complex Aphthosis |
|---|---|
| Common | Uncommon |
| Episodic | Episodic or continuous |
| Short-lived lesions | Persistent lesions |
| Few lesions | Few to many lesions |
| Three-six episodes/year | Frequent or continuous ulcerations |
| Prompt healing | Slow healing |
| Pain | Marked pain |
| Little disability | Disabling |
| Limited to oral cavity | May have genital lesions |
