Formation of Dental Tissues - Crown Flashcards
What does the Inner Enamel Epithelium (IEE) elongate to become?
Preameloblasts
What is repolarization of preameloblasts?
The process of the nuclei moving away from the basement membrane.
What do the outermost cells of the dental papilla become?
Odontoblasts
When do the odontoblasts repolarize?
When they become aware of the preameloblasts repolarizing.
What type of matrix is secreted by the odontoblasts?
A collagenous matrix.
During apposition what will the matrix secreted by odontoblasts create?
predentin
During maturation what will the matrix secreted by the odontoblasts create?
dentinogenesis
What is happening to the basement membrane as the matrices form?
It disintegrates
What happens to the preameloblasts before they secrete a matrix?
They become ameloblasts
What type of matrix is secreted by the ameloblasts?
A protein matrix
What is formed after the addition of hydroxyapatite to the protein matrix from ameloblasts?
Enamel is formed
What is the formation of dentin called?
Dentinogenesis
What is the formation of enamel called?
Amelogenesis
In amelogenesis what processes are associated with the formation of the protein matrix?
Tomes processes
True or False; the formation of the matrix in amelogenesis is in response to the formation of the dentin matrix.
True
During the maturation stage of amelogenesis what represents the daily process of the development of enamel?
Striae of Retzius
True or False; Striae of Retzius can be seen microscopically.
True
How is the DEJ formed?
Mineralization of the Basement Membrane
2.
What happens to the junction as the basement membrane is disintegrated?
It becomes scalloped making a greater surface area.
What is the significance of the larger surface area for the junction of enamel and dentin?
The greater the surface area the stronger the union.
What happens to odontoblasts?
Many will survive after dentinogenesis next to the pulp.
What happens to ameloblasts?
Will be lost aft the eruption of the tooth.
