Dental Lamina

Dental Lamina

Dental lamina.
Answer:

Development:

• During 6 weeks of intrauterine life, a continuous band of thickened epithelium forms around the mouth occupying the upper and lower jaw which is roughly horseshoe-shaped called a primary epithelial band.
• At about 7th week, this band divides into a lingual process called dented lamina and a buccal process called the vestibular lamina.

“Understanding the dental lamina through FAQs: Development, structure, and uses explained”

Question 6. Advanced bell stage of tooth development
Answer:

Features:

1. Formation of future dentin enamel junction (DEJ)

• It is the boundary between the inner enamel epithelium and odontoblasts

The first layer of dentin is laid down in the region of future cusps
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Proceeds pulpal and apically
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Ameloblast lies down enamel over dentin in the incisal and cuspal area
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It proceeds coronally and cervically

2. Commencement of mineralization

3. Formation of HERS

“Importance of studying the dental lamina for dental students: Questions explained”

• The cervical portion of the enamel organ contributes to Hertwig’s epithelial root sheath formation
• It consists of only inner enamel epithelium and outer enamel epithelium
• Inner enamel epithelium induces differentiation of dental papilla into odontoblast to lie down dentin in the radicular portion
• HERS is responsible for root formation

What is dental lamina

“Common challenges in mastering dental lamina notes effectively: FAQs provided”

4. Root formation

• Root formation occurs after the shape of the crown has been established
• The layers of HERS bend at the future CEJ at a right angle to narrow the opening of the developing tooth
• The rim of the HERS the epithelial diaphragm encloses the primary epithelial layer to initiate differentiation of odontoblasts from ectomesenchyme cells to form dentin of the root
• The connective tissue of the dental sac surrounding the root sheath proliferates and invades HERS and divides it into a network of epithelial strands
• The epithelium is moved away from the dentinal surface
• Due to it connective tissue cells come into contact with the outer surface of the dentin and differentiate into cementoblast to deposit a layer of cementum over the dentin
• The wide apical foramen is reduced first to that of diaphragmatic opening and later reduced by apposition of dentin and cementum to the apex of the root
• In this way, a single root is formed

“Factors influencing success with dental lamina studies: Q&A”