Lingual Nerve Injury Flashcards

1
Q

What is dysesthesia?

A

An abnormal and unpleasant sensation, either spontaneous or provoked

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2
Q

What is allodynia?

A

Pain in response to a normally non-noxious stimulus

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3
Q

What percent of lingual nerves lie above the lingual alveolar crest in the retromolar area?

A

14%

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4
Q

What is anesthesia dolorosa?

A

Pain in an area that is anesthetic

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5
Q

What is Tinel’s sign and what does it indicate?

A

A provocative test of regenerating nerve sprouts in which light percussion over a nerve elicits distal tingling.
-May indicate regeneration of small fiber recovery
OR
-Neuroma formation

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6
Q

How many levels are there for neurosensory testing?

A

3 levels

A, B, and C

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7
Q

What is level A in NST?

A

Directional and 2 point discrimination

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8
Q

What is level B in NST?

A

Contact detection

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9
Q

What is level C in NST?

A

Pain threshold and tolerance

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10
Q

What is normal 2 point detection for the LN?

A

6-7mm

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11
Q

What fibers does level A test?

A

A-alpha and A-beta fibers

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12
Q

What tools are used for testing level A

A

Use boley gauge or esthesiometer for 2 point

Use size 2-4 camel hair for directional movement

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13
Q

What fibers are tested in level B?

A

A-Beta fibers

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14
Q

What tools are used to test level B?

A

A series of filaments with increasing thickness/ stiffness for touch/pressure

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15
Q

What fibers are tested with level C testing?

A

A-delta, C, and unmyelinated fibers

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16
Q

What tools are used to test level C?

A

Pin prick
Thermal probe
Algometer

17
Q

What is the term for Seddon Class 1?

A

Neuropraxia

18
Q

What is the term for Seddon Class 2?

A

Axonotmesis

19
Q

What is the term for Seddon Class 3?

A

Neurotmesis

20
Q

What is the histological finding in neuropraxia?

A

No axonal damage, no demyelination, and no neuroma

21
Q

What is the histological finding in axonotmesis?

A

Some axonal damage, demyelination, or neuroma formation

22
Q

What is the histological finding in neurotmesis?

A

Severe axonal damage, nerve discontinuity, neuroma formation

23
Q

What is the outcome from neuropraxia?

A

Rapid recovery (days to weeks)

24
Q

What is the outcome for axonotmesis?

A

Loss of sensation, slow, incomplete recovery

Weeks to months

Microsurgery may help

25
What is the outcome for neurotmesis?
Loss of sensation, spontaneous recovery unlikely Microsurgery may help
26
After what age is there a significant decrease in successful outcomes?
45