Non-Keratinocytes: Definition, Features, And Origin

Non-Keratinocytes: Definition, Features, And Origin

Question 1. Non-keratinocytes.
Answer:

These cells do not possess:

• Cytokeratin filaments
• Ability to keratinize
• Mitotic activity
• The ability of arranged in layers
• Desmosomal attachments.
• These cells migrate to the oral epithelium from the neural crest or from the bone marrow.

Question 2. Keratinocytes.
Answer:

• These are an epithelial cell that synthesizes keratin.
• They are part of each layer of keratinizing oral epithelium.

They contains:

• Cell organelles
• tonofilaments.
• Cytokeratin
• Tonofibrils.
  • They show cell division, undergo maturation, and finally desquamate
  • They, during their migration from the basal to the superficial layer, undergo biochemical and morphological changes.
  • This results in the formation of keratinized squama.
  • Keratinocytes increase in volume in each successive layer from basal to superficial.

Question 3. Col.
Answer:

It means a valley.

• Connecting the facial and lingual side of the interdental papilla on the proximal side is an epithelial surface called col.

Shape:

• Concave – in healthy gingiva.
• Dome-shaped – gingival recession and inflammation.

Structure:

• It is covered by thin non-keratinized epithelium.

Clinical importance:

• It is more vulnerable to periodontal disease.
• It is because its contours allow bacteria, food debris, and plaque to accumulate in it.