Dentine-Pulp Complex Flashcards
What is found in the dental pulp
Cells
Extracellular components
Nerves
Blood vessels
Which cells are found in the pulp
Odontoblasts
Fibroblasts
Defence cells
Which extracellular fibres found in the pulp
Fibres - collagen, oxytalan
Matrix - proteoglycans, chondroitin SO4, dermatan SO4
What kind of nerves are found in the pulp
Sensory
Autonomic (sympathetic)
What are the functions of the pulp
Nutrition
Dentine repair (tertiary)
Defence
Neural
Describe the nutritive function of the pulp
Blood vessels provide necessary nutrients and remove waste and allows growth of primary and secondary dentine
Describe the neural function of the pulp
Sensory response translates to pain
Neural responses control dentine genesis
What is the dentine and pulp developed from
The dental papilla
What do ectomesenchyme cells do
Migrate from the neural crest to form the dental papilla
What are the structural links between dentine and pulp
Odontoblasts
Immune cells (dendritic cells)
Dentinal fluid
No blood vessels in normal dentine
What are the different types of tertiary dentine
Reactionary dentine
Reparative dentine
What are the functional links between dentine and pulp
Formation of secondary dentine
Formation of tertiary dentine in response to tooth wear
Regulate the exchange of materials between dentine and pulp
Describe the pulps haemodynamics and hydrodynamics
Fluid leaks from pulp capillaries into the interstitial space
Some fluid is drained by the lymphatics
Some passes along the dentinal tubules - dentinal fluid
The flow of fluid is proportional to the pressure inside of the pulp
What are the causes of tooth wear in enamel and dentine
Mastication (abrasion)
Bruxism (attrition)
Abfraction
Diet (erosion)
What is abrasion
Wear of tooth tissue by a mechanical process
What is attrition
Form of tooth wear caused by tooth to tooth contact (grinding)
What is erosion
Wear of tooth tissue caused by acids
What is abfraction
Loss of tooth structure where the tooth and gingiva meet
Which operative procedures can cause tooth wear
Cavity cutting, crown and bridge preparation
Occlusal equilibrium therapy
Describe primary dentine
Formed during tooth formation
Formed quickly
Describe secondary dentine
Formation starts when tooth is completely formed
Dentine is formed throughout lifetime
Describe reactionary dentine
Consequence of mild stimulus
Triggers primary original odontoblasts to produce dentine
Describe reparative dentine
In response to intense stimulus that destroys the primary odontoblasts
Laid down by secondary odontoblasts
What do reactionary and reparative dentine have in common
Both types of depleted dentinal tubules
