Dental OSCE (Objective Structured Clinical Examination) Practice Exam

Which of the following conditions would be least likely to cause scarring in the oral cavity?

1. Major aphthae

2. Herpetic lesions

3. Lichen planus

4. Traumatic ulcers

The correct answer is: Lichen planus

Lichen planus is characterized by the presence of a chronic inflammatory condition that usually affects mucous membranes, including those of the oral cavity. While lichen planus can lead to the development of white lesions and erosive forms that may be painful, it typically does not result in significant scarring. This is primarily because the lesions are often self-limiting and have a tendency to resolve, especially when managed appropriately, without causing the underlying connective tissue to undergo fibrotic changes typically associated with scar formation. In contrast, major aphthae, herpetic lesions, and traumatic ulcers can all lead to scarring due to their nature. Major aphthae can be quite large and painful, and healing may result in scarring if the lesions are extensive. Herpetic lesions can leave behind scars, particularly if they are recurrent and extensive. Traumatic ulcers caused by injury to the oral mucosa may also lead to scar tissue formation as the area heals. Thus, lichen planus is least likely to result in scarring in the oral cavity when compared to the other listed conditions.