Histo Flashcards
(17 cards)
what are the zones of the pulp
Predentin
Odontoblastic layer
Cell-poor zone
Cell-rich zone
What is in the pulp proper
core of connective tissue
what cells are in the pulp
Fibroblasts; most numerous Odontoblasts Fybrocytes Undifferentiated mesenchymal cells - stem cells Histiocytes Mast cells
what is the ground substance of the pulp
sol-gel colloidal system of proteoglycans and water.
What fibers are in the pulp
Elastin; only in walls of arterioles Collagen: Type I III IV
What can the pulp feel
ONLY PAIN
all afferent impulses from the pulp result in the sensation of pain.
What are A -delta fibers stimulated by
EPT and cold
What are c fiber stimulation associated with
Irreversible pulpitis they are considered TRUE NOCICEPTIVE NERVE FIBERS. resistant to necrosis stimulated by hot liquids Higher threshold due
what do efferent nerve fibers do
C-fibers
vasoconstriction
Dentinogenesis
What are the different theories
direct stimulation
transductions
hydrodynamic
stimulation
Hydrodynamic theory falls under
mechano-stimulation
Deep pulpal pain is explained by
Modulation theory
allogenic substances released
stimulation of C-fibers
C-fiber is bathing in hot stuff
Is there proprioception in the pulp
NO
Where are propiroception nerves found
PDL
What happens to venules under pressure
they collapse
What shunts the capillary beds
arteriovenous anastomoses
regulation of pulpal blood supply
What is the modulation theory
Alegogenic substances due to inflammation leads to the decrease in threshold of c fibers
