INBDE (Integrated National Board Dental Examination) Practice Exam

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Sulcular epithelium is described as

  1. Thick, keratinized stratified squamous epithelium

  2. Thin, non-keratinized stratified squamous epithelium

  3. Thin, keratinized non-stratified squamous epithelium

  4. Thick, non-keratinized non-stratified squamous epithelium

The correct answer is: Thin, keratinized non-stratified squamous epithelium

Sulcular epithelium is described as thin and keratinized non-stratified squamous epithelium. The sulcular epithelium lines the gingival sulcus, which is the space between the tooth and the surrounding gingival tissue. Its thin structure allows for the exchange of materials between the gingival sulcus and the oral environment. The keratinized nature of this epithelium provides protection against mechanical, chemical, and microbial insults. This combination of characteristics makes option C the correct answer. Option A is incorrect because sulcular epithelium is thin, not thick. Option B is incorrect because sulcular epithelium is keratinized, not non-keratinized. Option D is incorrect because sulcular epithelium is stratified, not non-stratified.

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