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Dental Histology

Chapter 13 Dentin & Pulp

QuestionAnswer
The inner portions of the tooth are made up of? Dentin and Pulp
Dentin is more hard or less hard than enamel. Dentin is LESS hard than enamel.
Dentin Compostion Calcium Hydroxyapatite
Root dentin is protected by what? cementum
Crown dentin is protected by what? enamel
Clinical Considerations with Dentin Attrition, gingival recession, and dentin hypersensitivity, caries
Odontoblasts come from where? Originally outer cells of the dental papilla.
Odontoblasts produce what? Lay down the initial material called predentin
The process of dentin matrix formation occurs during the apposition stage of the tooth development is known as? Dentinogenesis
What are the calcium hydroxyapatite crystals doing during the primary mineralization phase? Forming as globules and fusing together
3 Types of Dentin Primary, Secondary, and Tertiary
When is the primary dentin formed? BEFORE completion of the apical foramen
Is the primary dentin mineralized? yes, more mineralized than the secondary dentin
When is the secondary dentin formed? AFTER completion of the apical foramen and continues to form throughout the life of the tooth.
Is the secondary dentin formed slower or faster than the primary? Forms slower and has less mineralization
Tertiary dentin is formed when? Forms quickly as a result of an injury.
Where is the tertiary dentin found? underneath the exposed dentin tubules.
What is the function of the tertiary dentin? To seal off the injured area and repair.
What happens to the odontoblasts when there is damaged dentin? They can perish due to injury.
How do mesenchymal cells help? They come from the pulp to help repair the damaged tubules.
Peritubular Dentin Wall of tubules; highly calcified.
Intertubular Dentin Between tubules; highly calcified
Mantle Dentin Outermost layer; first dentin formed
Cicrumpulpal Dentin layer around outer plural wall.
Innermost tissue of the tooth is what? Pulp
What does the pulp develop from? The central cells of the dental papilla.
What is the function of the pulp? To support, maintenance and continued formation of dentin.
The pulp provides what to the dentin? nutritional support.
Where is coronal pulp located? in the crown of the tooth.
Where is the radicular pulp located? in the root area of the tooth.
What is pulpitis? pulp undergoes inflammation due to some type of injury.
What are pulp stones? Calcified stones that develop during tooth development.
What can happen to the pulp as people age? pulp can become more fibrotic and the pulp cavity can become smaller.
Created by: Strobelight95