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Occlusion > Quiz 2 > Flashcards

Quiz 2 Flashcards

1
Q

3 advantages to utilizing a non adjustable articulator

A
  1. Inexpensive - plastic is disposable
  2. Arbitrary/quick mounting
  3. Acceptable for single restorations as long as there is ANTERIOR GUIDANCE
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2
Q

What is the angle at which the non-working condyle moves MEDIALLY in a laterotrusive movement (measured in the horizontal plane)

A

Bennett Angle (Lateral Translation Movement)

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3
Q

Why is a face-bow used?

A

Used to ORIENT and mount the maxillary cast on the articulator relative to the joints
Transfers the INTERCONDYLAR DISTANCE of the patient to the articulator

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4
Q

What are the 3 distinct reference points of the face bow?

A

1 & 2 - Hinge axis of each condyle - POSTERIOR

3 ARBITRARY- established by manufacturer - ANTERIOR

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5
Q

2 Advantages of the fully adjustable articulator

A
  1. Duplicates mandibular movement

2. Precise restorations with few adjustments

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6
Q

Disadvantage of the fully adjustable articulator

A

EXPENSIVE

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7
Q

What pathway does the ML cusp of the maxillary 1st molar travel across the mandibular 1st molar from the central groove out the lingual?

A

Laterotrusive Pathway (aka working)

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8
Q

Nature of occlusal prematurities - these are recored and recognized as “____” contact, before the patient closes all the way into _____ _____. First tooth contact in centric relation is a good example of an _______ _______. The term prematurity implies that the contact is either on an _____ or is in an area that is not considered _____. NONE of these contacts are proper maximum intercuspation occlusal contacts. The mandible can be displaced ______ and or _____.

A 
"high"
Maximum Intercuspation
Occlusal prematurity
Incline
Stable
Anteriorly
Laterally
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9
Q

Forward displacement of the mandible is caused by incisal or occlusal contact on POSTERIOR teeth which causes the mandible to do what?

A

Anteriorly displaced

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10
Q

Occlusal contact areas that cause lateral displacement.. Contact A = lingual inclines of max facial cusps contacting _____ _____ of mandibular facial cusps.

A

Facial inclines

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11
Q

Non-working interferences usually cause what?

A

Lateral displacement of the mandible

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12
Q

Non-working interferences:

  1. Lingual inclines of the mandibular posterior ____ cusps
  2. Facial inclines of the maxillary posterior _____ cusps
  3. Parallel to the DF ______ groove - Max 1st molars
  4. Parallel to the distal oblique groove - Max ____ ___
A
  1. Facial
  2. Lingual
  3. Developmental
  4. 1st Molars
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13
Q

What are potentially observed protrusive interferences,
DISTAL marginal ridges of the _______ posterior teeth
MESIAL marginal ridges of the _______ posterior teeth

A

Mandibular

Maxillary

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14
Q

In closure interference (tooth/jaw position) Summation A contact will display mandibular deviation where?

A

Opposite side

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15
Q

In closure interference (tooth/jaw position) Summation B contact will display mandibular deviation to where?

A

Same side as the interference

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16
Q

What 3 things are involved with initial TMJ dysfunction?

A
  1. Retrodiscal ligaments elongate
  2. Disc morphology changes
  3. Slight abnormal translation occurs between the condyle and disc
17
Q

What are 3 TYPES of factors related to TMD?

A
  1. Predisposing factors -increase risk
  2. Initiating factors - responsible for disease
  3. Perpetuating factors - interfere with healing or enhance progression
18
Q

What are the 5 major factors involved with the etiology of TMD?

A
  1. Occlusal
  2. Trauma
  3. Emotional Stress
  4. Deep pain
  5. Parafunction
19
Q

Anxiety, fatigue, stress, overuse/underuse of jaw, poor sleep, bruxism, and altered muscle contraction are what types of extracapsular TMJ problems? (not caused by normal masticating)

A

Mitigating factors

20
Q

What is the masseter trigger point?

A

When pressing on the trigger points, the trigger sends referred pain to the max and mand posterior teeth

21
Q

What trigger point sends referred pain to the zygomatic arch and the TMJ?

A

Lateral pterygoid trigger point

22
Q

4 symptoms of intracapsular TMD

A
  1. Joint sounds - popping/crepitus
  2. Limited opening - deviation or deflection of mand.
  3. Pain during loading of the TMJ
  4. Sudden change in a patients occl.
23
Q

What type of range of motion will have a soft end feel when opening the mandible indicating a muscle problem?

A

Extracapsular

24
Q

Most parafunctional activities occur at a subconscious level and are directly related to emotional stress, what are 2 examples?

A
  1. Clenching

2. Bruxism (SSRIs and antidepressants are linked to increased bruxing)

25
Q

T/F Occlusal prematurities (interference) do NOT directly cause bruxing events.

A

True

Occlusion (4 decks)

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