Intradental sensory receptors
Hydrodynamic
A? & A? axons
Receptors in or near dentine
Respond to flow in dentinal tubules
Respond to any stimulus that displaces tubule contents
Normally more sensitive to outward than inward flow
Etching cut dentine increases sensitivity to stimuli other than thermal
Short latency response to cooling
Heat and chemo-sensitive
A? & C axons
Respond to heating, not fluid flow
Respond to a chemical stimuli such as bradykinin and capsaicin
Stimuli that evoke pain from dentine:
hot
cold
mechanical stimuli
removal of water
osmotic
air stream
absorbent materials
changes in hydrostatic pressure