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Healthy biological width
1 - 2 mm (1 mm of junctional epithelium and 1 mm of connective tissue proper)
Junctional epithelium (Epithelial attachment)
Formed after ameloblasts have created mature enamel and secreted a basal lamina. Definitive junctional epithelium is formed by remaining epithelial cells since ameloblasts are lost after eruption.
When is the first junctional epithelium established?
When the tooth first erupts into the oral cavity
What kind of junction is found between enamel and the superficial layer of juntional epithelium?
Reasons why junctional epithelium may recede
1. Age 2. Disease 3. Trauma 4. Malocclusion 5. Frenum attached too far coronally which pulls tissue
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