Dental OSCE (Objective Structured Clinical Examination) Practice Exam

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What type of lesion is characterized by a white appearance with a red border and significant scarring?

Herpetic lesion
Major aphthae
Contact dermatitis
Angular cheilitis

The correct answer is: Major aphthae

The lesion described as having a white appearance with a red border and significant scarring is characteristic of major aphthae, also known as major canker sores or ulcerative stomatitis. These lesions are typically larger and deeper than minor aphthous ulcers, and they can cause significant pain and discomfort. The white appearance is due to the fibrinous exudate that forms over the ulcer, while the red border is indicative of the surrounding inflamed tissue. Major aphthae often present with a well-defined margin, and their size can lead to scarring after healing, particularly if the lesions are extensive or recurrent. This highlights the distinct nature of major aphthae in contrast to other types of lesions that may not exhibit such characteristics. Understanding these features aids in diagnosing and managing the condition effectively.