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Occlusion > Quiz 1 Review > Flashcards

Quiz 1 Review Flashcards

1
Q
  1. Movement of the Temporomandibular joint is characterized by the position of what structure in what space?
A

Movement characterized by position of condyle in glenoid fossa

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2
Q
  1. Movement of the temporomandibular joint is best viewed from what perspective of the skull?
A

Best viewed from sagittal or “side” view

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3
Q
  1. What are five functions and purposes of the ligaments that support the TMJ and mandible?
A
  1. Limit mandibular movement
  2. Protect musculature, esp during extreme movement
  3. Non-elastic
  4. Non-contractile
  5. Not innervated
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4
Q
  1. The articular disc is attached to what at the anterior portion and to what at the posterior region?
A

Anterior - Musculature (Sup. head of lat pterygoid)

Posterior - Retrodiscal tissues

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5
Q
  1. Normal rotation movement of the mandible is limited by what portion of the temporomandibular ligament?
A

Outer oblique portion (OOP)

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6
Q
  1. Posterior movement of the mandible is limited by what portion of the temporomandibular ligament?
A

Inner horizontal portion (IHP)

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7
Q
  1. Most articulation between the condyle, articular disc, and temporal bone occurs on which aspect of the condyle?

Which aspect has greater surface area?

A

Most articulation will occur in the anterior aspect of the condyle (even though greater surface area on posterior portion)

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8
Q
  1. What are two other terms for maximum intercuspation?
A
  1. Centric occlusion (CO)

2. Habitual occlusion/centric - “habit”

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9
Q
  1. Maximum intercuspation - T/F:
    - Maximum intercuspation describes an occlusal relation, but not tooth position
    - Teeth are contacting in a position that that patient finds the most comfortable
    - It is not easily achievable, but always reproducible, by the patient
A
  1. False - Max. intercuspation describes BOTH an occlusal relation and tooth position
  2. True - most comfortable tooth contact position
  3. False - It is easily achievable, but not always reproducible, by the patient
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10
Q
  1. Centric relation
    - What kind of position?
    - Does it need tooth contact to be obtained?
    - Establishes the position of the condyle in what two locations?
    - The anterior disc is properly interpose between what two structures?
A
  • Condylar position
  • Does not need tooth contact to be obtained
  • Establishes the condyle in a superior and anterior location
  • Disc is interposed between the condyle and temporal bone
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11
Q
  1. Centric relation
    - Articulation is on what portion of the articular disc?
    - Described as the most or least stable position of the condyle?
    - T/F: A position of the mandible where the musculature displays maximal tonus
A
  • Articulation is on the thinnest portion of the disc
  • Described as the most stable position of the condyle
  • False - Centric relation is a position of the mandible where the musculature displays minimal tonus
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12
Q
  1. Max. Intercuspation clinical conditions
    - If centric relation and max intercuspal do not coincide, the patient will have “what”?
    - Few or most patients have slide from centric relation into max. intercuspation?
    - Max intercuspation is ______ contact of all of the teeth and is considered the “______” of the slide
A
  • Patient will have a slide
  • Most patients have slide
  • Max intercuspation is simultaneous contact of all teeth
  • Considered the “endpoint” of the slide
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13
Q
  1. Max. Intercuspation clinical conditions
    - All occlusal forces should be concentrated down the long axis of anterior or posterior teeth?
    - Max intercuspation position is dynamic or static in nature?
    - Will max intercuspation change throughout a patient’s life?
A
  • Concentrated down long axis of posterior teeth
  • Position is dynamic in nature
  • Max intercuspation will change throughout a patient’s life
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14
Q
  1. In an ideal occlusion, when mand teeth close against max teeth, what four ideal conditions should exist?
    - Contact, condyle and articular disc, musculature tonus, occlusal contact
A
  • Ideal teeth contact simultaneously
  • Ideal situated location for condyle and articular disc
  • Musculature at minimum tonus
  • Occlusal contact uniform and simultaneous
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15
Q
  1. Lateral movements of the mandible on the right side are also labeled as what?
A

Right side considered to be on “balancing side” or “non-working” slide

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16
Q
  1. Summary of Ideal Occlusion - T/F
    - Centric relation and maximum intercuspation occur one after the other
    - All teeth contact simultaneously
    - All occlusal forces on posterior teeth are directed down short axis of teeth
    - Ant tooth contacts dominate over Post tooth contacts
A
  1. False - Centric relation and max. intercuspation occur simultaneously
  2. True - contact is simultaneous
  3. False - All occlusal forces on post. teeth are directed along long axis
  4. False - Post tooth contacts > Ant tooth contacts
17
Q
  1. Summary of Ideal Occlusion - T/F
    - All eccentric movements guided by post teeth
    - No crossover contacts on posterior teeth should be seen
A
  1. False - All eccentric movements guided by ant teeth

2. True - No crossover contacts should be seen on post teeth

18
Q
  1. Emphasis of the Muscles of Mastication is primarily on the “_____” of the muscles

This is a precursor to understanding what dysfunction?

Actions of the muscles will be described as either what two activities?

A
  1. Actions of the muscles of mastication
  2. Precursor to understanding temporomandibular and occlusal dysfuntion
  3. Normal vs parafunctional (abnormal) activities
19
Q
  1. The Masseter elevates the mandible in what direction?

The masseters causes the teeth to do what? Is this activity normal or parafunctional?

Is the masseter the primary muscle for protrusive movement?

The masseter minimally aids in what kind of movement?

A
  1. Masseter elevates mandible in superior direction
  2. Masseter causes the teeth to clench (parafunctional)
  3. Masseter is not the primary muscle for protrusive movement
  4. Masseter minimally aids in lateral movement
20
Q
  1. Relationship between medial pole of conyle and medial pterygoid muscle (Non-working side) establishes what “position”?

The normal curve of occlusion is possible due to the the interaction of the medial pole of the condyle with what structure?

In ideal patients, what kind of movement is impossible from the fully seated position of the condyle in the fossa?

A
  1. Mid-most position
  2. With the steep medial wall of the fossa
  3. Mand. lateral translation is impossible
21
Q
  1. What three muscles are involved in seating condyles in the fossa and which is the most important?
A
  1. Temporalis (most important)
  2. Masseter
  3. Medial pterygoid

(Lateral pterygoid is not involved)

22
Q
  1. Lateral Pterygoid
    - Superior head comprised of what kind of muscle fibers?
    - These muscle fibers imply that motion is expressed in what kind of fashion?
    - Which is smaller, superior head or inferior head?
A
  • Very slow acting muscle fibers
  • Extremely short and very controlled movements
  • Superior head is smaller than inferior head
23
Q
  1. Lateral Pterygoid - Superior head
    - Maintains a sustainable and consistent position of what structure?
    - Is progressively active during what kind of movement of the mandible?
    - It will frequently display spasms as a result of what?
    - What kind of parafunctional activity is displayed during a spasm?
A
  • Articular disk
  • Active during closing
  • During occlusal dysfunction
  • Articular disk pulled anteriorly out of glenoid fossa
24
Q
  1. Lateral Pterygoid - Sup. Head
    - Works in concert with what other muscle?
    - Can clinicians palpate this deeply placed muscle?
A

Works in concert with inf head of lateral pterygoid

Clinicians can palpate (even though it is deeply placed and mostly covered by the medial pterygoid)

25
Q
  1. Digastric Muscle Complex
    - Posterior head assists in producing what movement?
    - Anterior head is minimally involved in producing what movement?
    - Both heads of the digastric muscle complex will elevate what bone?
    - Muscle spasms are more completely seen in anterior or posterior digastric?
A
  • Post. head assists in producing mandibular retrusion
  • Anterior head minimally involved in mandibular retrusion (mainly post)
  • Elevate hyoid bone
  • Muscle spasms more commonly seen in posterior
26
Q
  1. Mylohyoid muscle
    - How does it move the mandible?
    - It elevates what three structures?
    - Muscle is important for what activities?
A

It slightly depresses the mandible

Elevates the hyoid, floor of the oral cavity, and tongue

Speaking and swallowing

27
Q
  1. Early normal jaw opening movement
    - Inferior head of the lateral pterygoid relaxes/contracts?
    - Condyle head moves ant/post?
    - Articular disk moves with what structure?
    - Superior retrodiscal tissues undergo what?
A
  • Inf. head contracts (slow and consistent)
  • Condyle head moves anteriorly
  • Articular disk moves with condyle
  • Undergo slight tautness
28
Q
  1. Muscle vectors in Sagittal plane
    - Ant temporalis force vector
    - Mid temporalis force vector
    - Post temporalis force vector
    - Masseter force vector
A
  • Sup and slightly anterior
  • Sup and slightly post
  • Post and slightly sup
  • Sup and slight ant
29
Q
  1. Muscle vectors in Sagittal plane
    - Ant digastric
    - Post digastric
    - Inf head of lat pterygoid
A
  • Posterior
  • Sup and post
  • Ant

Occlusion (4 decks)

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