4 Tooth Pain Flashcards
when is pain produced
when a stimulus is strong enough to trigger a neural respone
intensity, location and quality of pain differs due to ___
stimulus and the type of nerve fibers involved
what is the main complaint for those seeking dental treatment?
pain
where is CB #1 for V
trigem ganglion
where is CB #2 for V
Trigeminal nuclear complex: oralis and interporalis
where is CB #3 for V
contralateral VPM
where does the tract terminate
post central gyrus of parietal lobe
what type of stimuli for thermomechanical nociceptors
mechanical and thermal stimuli
what type of stimuli for polymodal nociceptors
thermal, mechanical, and chemicial stimuli
what nerve fibers are at the terminal ends of free nerve endings
A-delta
A-beta
C
what innervates dentin-pulp complex
myelinated A-delta
myelinated A-beta
unmyeliinated C
sympathetic fiberss
what regulate blood flow in the pulp
sympathetic fibers
are there parasympathetic fibers in the pulp
controversial, but most likely nah
how do fibers run in pulp?
run thru apical foramen and follow vascular supply
what fibers are at the pulp-dentin border in the coronal aspect of the pulp and pulp hornss
a-delta fibers
what form plexi known as plexus of Raschkow? where is it located?
a-delta fibers
located under odontoblast layer
what fibers terminate as free nerve endings between odontoblats
a-delta
what fibers concentrate in the core of the pulp and apical layer and extend into the cell free zone beneath odontoblastic layer
C fibers
what fibers are thought to function similarly to A-delta but are low threshold and more sensitive
a-beta
order of fibers from most to least prominent
C > A-delta > A-beta
location of lightly myelinated a-delta fibers
oral mucosa
ginigiva
PDL
pulp
receptor characteristics of a-delta fibers
free nerve ending mechanothermal/mechanosensistive nociceptor
receptor stimuli of a-delta fibers
responsive to intenses mechanical or mechanothermal stimuli
function of a-delta fiber
fast, sharp localized pain
location of c fiber (polymodal and silent)
oral mucosa
ginigiva
PDL
pulp
receptor characteristics of C fiber
free nerve ending polymodal or silent nociceptor
stimuli for c fiber (polymodal)
responsive to intense stimuli, includes thermal, mechanical and chemical mediators released during inflammation
what type of fibers are small diameter and have fasts transmission
a-delta
what type of fibers are thin diameter and slow transmission
c fibers
function for c fiber (polymodal)
slow dull diffuse pain
stimuli for c fiber (silent)
normally unresponive to noxious mechanical stimuli. Is recruited during inflammation
function for c fiber (silent)
becomes sensitized; activated and responsive following inflammation
where do a-delta and a-beta fibers directly transmit pain? what does this create?
thalamus
creates fast, sharp pain that is easily located
what fibers respond to probing, drilling and hypertonic solutions (hydrodynamic theory)
a-delta and a-beta
what fibers respond to rapid changes in temp
a-delta and a-beta
what fibers are influenced by modulating interneurons before reaching thalamus
c fibers
what fiber elicits a response to gradual temp changes
c fibers
what fiber is responsible for referred pain which is a very common phenomenon in the oral cavity
c fibers
okane says to know this
what type of pain may decrease the threshold of nociceptors
persistant pain
___ can result in increased sensitivity seen in peripheral sensitization
persistent pain
