Occlusion 1 Flashcards

1
Q

What movement does the temporalis produce?

A

elevate and retract

Aid in rotation

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2
Q

What movement does the lateral pterygoid produce?

A

positions disc in closing (superior - SLP)

Protrude and depress mandible and causes lateral movement (inferior - ILP)

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3
Q

What movement does the medial pterygoid produce?

A

elevate mandible

Lateral movement and protrusion

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4
Q

What movement does the masseter produce?

A

elevate and protracts

AIDS in lateral movement

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5
Q

What occurs at the tmj during rotational movement?

A

mandible acts as a hinge around the terminal hinge axis

This is rotation as if it were an angle like this <

No downwards or forwards movement

Condyle and disc remain in articular fossa

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6
Q

what occurs during translational movement?

A

lateral pterygoid contracts and pulls the disc and condyle

Condyle travels down and forward along the incline of the articular eminence

May also travel laterally

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7
Q

Label possets envelope

A

ICP = intercuspal position

RCP = retruded contact position

Pr = protrusion

R = retruded axis position

E = edge to edge

T = maximum opening

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8
Q

What occurs at ICP?

A

tooth position regardless of condylar position

The most comfortable bite and best fit of the teeth together

Usually 1mm anterior to RCP

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9
Q

What occurs at E in possets envelope?

A

edge to edge

Maxillary teeth slide up palatal surfaces of mandibular anteriors to where in usual edges are in contact

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10
Q

What occurs at Pr?

A

Protrusion

condyle moves forward and downwards on articular eminence

Only the incisors and canines touch until eventually there are no tooth contacts in full protrusion

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11
Q

What occurs at T?

A

maximum opening

No tooth contacts

Full translation of condyle over articular eminence

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12
Q

What occurs at R?

A

retruded axis position

No tooth contact

Terminal hinge axis position

Most superior anterior position of the condylar head in the fossa

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13
Q

What occurs at RCP?

A

firs tooth contact when mandible is in retruded axis position

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14
Q

What is the working side and the non working side

A

The working side is the side the mandible moves to

So if I moved my jaw left then left side is working wider

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15
Q

What is the bennet angle?

A

Th path of the non working side of the mandible during lateral movement compared to mandible in ICP

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16
Q

what is Fremitus? How check for it?

A

tooth has excess vibration due to a high occlusal contact

Patient often complains of hitting a tooth high with no apparent reason

Sit patient up right and stabilise head parallel to floor, put finger on cervical of maxillary teeth, on each tooth have patient to tap bite together and then determine how much vibration there is.