Pulp and responses Flashcards
name 3 functions of pulp
Dentine formation
Defence and repair e.g. tertiary dentine
Sensory
name this structure
pulp horns
name this structure
pulp chamber
name this structure
root canal
name this structure
apex
name this structure
accessory furcation canal
name this structure
lateral canal
name this structure
apical delta
what does delta mean?
when something branches off to exit i.e. river or pulp
the lateral canal allows communication between the pulp and what?
PDL
name this structure on the apex of the tooth
cementum
name this structure on the apex of the tooth
radiographic apex
name this structure on the apex of the tooth
apical foramen
name this structure on the apex of the tooth
cemento-dentinal junction
name this structure on the apex of the tooth
apical constriction
how is the pulp different to normal connective tissue? 4
contains specialised cells
is contained in a rigid chamber
blood vessels with wide lumen and thin walls
densely innervated
name this part of the pulp
odontoblast layer
name this part of the pulp
cell free zone of Weil
name this part of the pulp
cell rich zone
name this part of the pulp
pulp core
name this part of the pulp
pulp core
name this part of the pulp
cell rich zone
name this part of the pulp
cell free zone of Weil
name this part of the pulp
odontoblast layer
odontoblasts are specialised from what type of cell?
ectomesenchymal cells
what type of cell are odontoblasts?
postmitotic cells
the activity of odontoblasts is controlled by what?
growth factors
odontoblast processes extend how far into dentine?
1/3
odontoblasts form a single layer of ?cells that appear ?
columnar
pseudostratified
what is the most numerous cell in the cell rich zone?
fibroblasts
what are the defence cells present in the pulp?
macrophages
T lymphocytes
axon reflexes cause vasoconstriction or vasodilation?
vasodilation
the blood supply to the pulp terminates where?
rich sub-odontoblastic capillary plexus
how does the pulp die?
Local vasodilation
Increase volume in area
Increase in pressure due to rigid chamber
Blood flow stops due to competing pressures across the capillary bed
dentinal fluid flow changes with what?
pulpal pressure
how does inflammation affect dentinal fluid flow?
Inflammation increases pulpal pressure - fluid flow rate increases
how do vasoconstrictors affect dentinal fluid flow?
- Vasoconstrictors block the vessels going into the pulp - reduce dentinal fluid flow
what percentage of the innervation to the pulp is non-myelinated?
70-80%
what happens to the nerves as they travel towards the outer pulp?
get thinner and loose their myelination
innervation to the pulp ends where?
in the cell free zone with the plexus of Raschkow
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