Week 9: Dentinal Hypersensitivity

Question 1

dentinal hypersensitivity

Answer 1

short, pain pain arising from exposed dentin that occurs in response to stimuli that CANNOT be ascribed to any other form of dental defect/pathologic condition

Question 2

sensitive dentin characteristics

Answer 2

• smear layer NOT present
• 8x as many open DT
• 2x diameter of open tubules

Question 3

non-sensitive dentin characteristics

Answer 3

• smear layer present

- fewer DT at the surface

Question 4

unmyelinated fibers

Answer 4

C fibers

Question 5

myelinated fibers

Answer 5

A fibers (delta and beta)

Question 6

A fibers typically at…

Answer 6

top of pulp chamber

Question 7

C fibers typically at…

Answer 7

apex of tooth, in pulp canal

Question 8

A fiber comprised of small
myelinated fibers that
evoke a sensation of
well-localized sharp pain;
thought to be responsible
for DH

Answer 8

A-delta fiber

Question 9

A fiber (susceptible to the same
types of stimuli) respond
more sensitively to
electrical stimulation

Answer 9

A-beta fiber

Question 10

fibers responsible for dull, poorly localized,
aching type of pain, usually
associated with pulpal pain

Answer 10

C fibers

Question 11

heat pushes the process ___

cold pushes the process ___; both of these _____ the nerve

Answer 11

in, out; both stimulate