Length of junctional epithelium is:

 # Length of junctional epithelium is:

A. 0.25-1.35 mm

B. 0.5-0.75 mm

C. 1.0-2.0 mm

D. 1.0-1.5 mm

The correct answer is A. 0.25-1.35 mm.

Junctional Epithelium: The epithelium that attaches the gingiva to the tooth's surface, it consists of stratified squamous non-keratinizing epithelium. It is 3-4 layers thick in early life but the number of

layers increases with age to 10-20. It is thicker in the coronal portion but becomes thinner toward the cemento-enamel junction only a few cell layers. The length of the JE ranges from 0.25 to 1.35mm.