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Occlusion > Week 6 - Optimal Occlusion > Flashcards

Week 6 - Optimal Occlusion Flashcards

1
Q

Orthopedically Stable Joint Position

A

The articular surfaces and tissues of the joints are aligned such that forces applied by the musculature do not create any damage

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2
Q

How is optimal joint relationship achieved?

A

When the articular discs are properly interposed between the condyles and the articular fossae

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3
Q

More teeth contacts provide…

A

More stabilization of the mandible and decreases the forces to each tooth

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4
Q

Cusp-fossa occlusion

A

tooth-to-tooth

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5
Q

Cusp-marginal ridge occlussion

A

Tooth to two teeth

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6
Q

Is cups-fossa or cusp-marginal ridge more ideal?

A

Cusp-fossa, because cusp-marginal ridge can push teeth apart or lodge food into the embrassure

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7
Q

Axial loading

A

Cusp-tip to a flat surface

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8
Q

What type of lever do occlusal forces act as?

A

Class 3 - the effort is in between the force and the fulcrum

It’s not super efficient - that’s why we crush things on the posterior teeth

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9
Q

How do posterior teeth protect occlusion?

A

In maximum intercuspation, posterior teeth come into contact and act as stops to minimize horizontal load on anterior teeth

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10
Q

How do anterior teeth protect occlusion?

A

The anterior teeth guide excursive movements of the mandible so no posterior teeth contacts occur during lateral or protrusive excursion

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11
Q

What are some offects of tooth loss?

A 
Supraeruption
Tilting
Loss of contact
Loss of posterior tooth support
Loss of vertical dimension
Flaring of anterior teeth
Non-working interferences
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12
Q

What are occlusal treatment goals?

A
  • To direct occlusal forces along the long axes of the teeth
  • To make sure all mandibular teeth contact their maxillary opponents at the same time and with the same intensity
  • To furnish a smooth protrusive path guided by the anterior teeth without any interference from occlusal contacts between the posterior teeth (Posterior disclusion)
  • Working contacts should no be prevented
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13
Q

What are the pairs of equilibration procedures

A
  • Reduction of all contacting tooth surfaces that interfere with centric relation
  • Selective reduction of tooth structure that interferes lateral excursions
  • Elimination of all posterior tooth structure that interferes with protrusive excursions
  • Harmonization of anterior guidance
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14
Q

What is responsible for most failures of equilibration?

A

Improper manipulation of the mandible

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15
Q

How do you locate occlusal interference?

A

Have the patient feel the first contact, and then squeeze to determine the direction and degree of the slide from CR

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16
Q

What are the two centric interferences

A

Interference of the arc of closure

Interference to the line of closure

17
Q

Interference of the arc of closure

A

Any tooth structure tht interferes with the closing arc (CR) has the effect of displacing the mandible forward of the interference to reach MI

18
Q

What is the grinding rule to correct anterior slide?

A

MUDL - mesial inclines of upper and/or distal inclines of lower teeth

19
Q

Interference to the line of closure

A

Interferences that cause the mandible to deviate right or left from the initial contact point to MI

20
Q

Grinding rule if the mandible deviates toward the cheek

A

BULL - buccal incline of uppers and/or lingual incline of lower

21
Q

Grinding rule if the mandible deviates toward the tongue

A

LUBL - lingual incline of uppers and/or lingual incline of the lower

22
Q

What are the two divisions of lateral interferences

A

Non-working side interferences

Working side interferences

23
Q

What can happen when you start to relieve non-working side inclines

A

You can start to have working side interferences, and will have to start relieving them. Which can cause interferences on the non-working side.
So you usually have to adjust both together

24
Q

Which teeth should touch during protrusive movements

A

Only anterior teeth

25
Q

What is the grinding rule for protrusive interferences?

A

DUML - distal inclines of uppers and/or mesial inclines of lowers

26
Q

With steep anterior guidance, correction of protrusive interferences is usually…

A

Minimal

27
Q

With flat anterior guidance, correction of protrusive interferences is usually…

A

More extensive

Occlusion (12 decks)

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