Dentin Tissue Structure Flashcards
Composition of dentin?
70% inorganic and 30% water/organic material
What makes up the basic unit of structure of dentin?
- Dentinal tubule
- Peritubular dentin
- Intertubular dentin
Where does secondary dentin form?
Inside primary dentin
When does secondary dentin form?
When the tooth first occlues with an opposing tooth
What happens when secondary dentin is formed?
The pulp chambers decrease in size
Location of odontoblast cell bodies?
Outside of the calcified dentin
Reason for the location of odontoblast cell bodies?
To produce secondary and reparative dentin
What are the three types of trauma that cause the formation of reparative dentin?
Occlusal, chemical, and mechanical
Reparative dentin: occlusal trauma
Reparative dentin is produced in response to malocclusion
Reparative dentin: chemical trauma
Chemical trauma is cause by chemicals found within material used in restorations or bacterial decay (i.e. lemon juice, gastric acid, etc.)
Reparative dentin: mechanical trauma
Mechanical trauma is due to cavity preparations that extend into the dentin