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Clinical Review > Lingual Nerve Injury > Flashcards

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
Q

What is the outcome for neurotmesis?

A

Loss of sensation, spontaneous recovery unlikely

Microsurgery may help

26
Q

After what age is there a significant decrease in successful outcomes?

A

45

Clinical Review (9 decks)

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