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KCS > Occlusion > Flashcards

Occlusion Flashcards

1
Q

What is occlusion?

A

The study of how the teeth meet together

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2
Q

What is the aim of working with occlusion?

A

Getting the teeth to work harmoniously

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3
Q

What are the 4 determinants of occlusion?

A

Occlusion
TMJ
Masticatory muscles
CNS

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4
Q

How does the CNS control occlusion?

A

The brain controls stress, anxiety, habitual habits, conditions like PTSD all of which will affect occlusion

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5
Q

Describe the movement of the TMJ?

A

Freely movable

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6
Q

Where does the disc of the TMJ sit?

A

Between the temporal bone and the condyle

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7
Q

What is the function of the disc of the TMJ?

A

Acts as lubricant which allows the bones to move past each other, so the borns don’t wear out

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8
Q

Name the 2 joint cavities of the TMJ

A

Superior (between the temporal bone and disc) and Inferior (between the disc and head of condyle)

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9
Q

What are the 3 planes of rotation around the mandible by the TMJ?

A

Intercondylar axis
Vertical axis
Sagittal axis

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10
Q

What is intercuspal position?

A

How the teeth meet within maximum position

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11
Q

What is centric relation?

A

Position of mandible on its retruded arc of closure (position of the jaw when you bite and your teeth come together)

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12
Q

What is the retruded contact position?

A

Position of the mandible when first tooth contact occurs on retruded arc of closure = premature contact between teeth

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13
Q

What is the least reproducible position fo the mandible?

A

Rest/postural position

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14
Q

What is the working side of the teeth?

A

The side the teeth are moving towards, the teeth are touching

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15
Q

What is the non-working side of the teeth during rotation?

A

The side the teeth are moving away from, the teeth are not touching

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16
Q

Movement towards the WS condyle will cause what type of movement?

A

Rotation

17
Q

Movement towards the WS condyle will cause what type of movement on the NWS condyle?

A

Orbits on a sweeping path

18
Q

Other than rotation what movement can the TMJ make?

A

Translation

19
Q

What determines the borders of Posselt’s border movements?

A

Superiorly by teeth contact

All others by TMJ and ligaments

20
Q

How does the first 20mm of jaw opening occur?

How does the next 25mm occur?

A

Rotation of TMJ

Translation of TMJ

21
Q

When you close the jaw what position does it go into?

A

Maximal protrusion

22
Q

Attachments of masseter?

Function of masseter?

A

Zygomatic arch to lower lateral aspect of ramus.

Closing the jaw

23
Q

Attachments of temporalis?

Function?

A

Temporal fossa and coronoid process.

Closing

24
Q

Attachments of medial pterygoid?

Function?

A

Superficial and deep heads attach to medial surface of angle of mandible
Closing

25
Q

Function of superior and inferior heads of lateral pterygoid?

A 
Superior = opening and closing
Inferior = opening and side to side movement

KCS (11 decks)

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