Distinct white radiating striae are visible in lesions associated with:___________?
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Answer: A. Lichen planus
Explanation
Lichen planus lesions are classically identified by delicate white lines known as Wickham's striae. Keratotic white striae form a lacelike pattern on the affected oral mucosal surfaces. Histological examination reveals a subepithelial band-like lymphocytic inflammatory cell infiltrate. Oral lichen planus is a chronic T-cell mediated autoimmune inflammatory mucosal disease. Clinical presentations include reticular, plaque-like, erosive, and atrophic mucosal forms. Wickham's striae represent areas of focal epithelial hyperkeratosis overlying T-lymphocyte infiltrates.
Dentists monitor patients with erosive lichen planus due to a small malignant transformation risk. Topical corticosteroids provide relief during painful acute flare-ups of oral lesions. Biopsy confirms the diagnosis when clinical striae are atypical or erosive areas predominate. Erythema multiforme presents with target skin lesions and painful hemorrhagic oral crusting. Pemphigus produces fragile intraepithelial blisters rather than characteristic white radiating striae. Leukoplakia appears as a white plaque that cannot be scraped off but lacks fine striae.
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Answer: C. candidiasis
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Q4. A white mucosal lesion carrying definitive precancerous potential is__________________?
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Answer: A. Leukoplakia
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Q5. What is considered the widely accepted etiological theory of dental caries_____________?
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Answer: C. Acidogenic theory
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