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Pros > The ABC's of Occlusal Contacts > Flashcards

The ABC's of Occlusal Contacts Flashcards

1
Q

When would a dentist desire Balanced Occlusion?

A

For Dentures

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2
Q

What is Balanced Occlusion?

A
  • Simultaneous cross-arch contacts during eccentric movements
  • Theory: balanced and distributed horizontal forces lead to oral health and provide denture stability
  • Indications: Complete Denture
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3
Q

What is Group Function?

A
  • Total stress distributed among many teeth
  • No interferences from closure to intercuspal position
  • No balancing interferences in eccentric movements
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4
Q

What is Mutually Protected Occlusion?

A

“The posterior teeth protect the anterior teeth and the anterior teeth protect the posterior teeth”

  • MIP occurs with condyles in centric relation
  • Posterior teeth “hold shim”
  • Anterior teeth “drag shim”
  • Immediate separation (no contacts) of posterior teeth in any eccentric movement
  • Anterior Guidance: anterior teeth provide separation of posterior teeth in eccentric movements
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5
Q

What is Anterior Coupling/Anterior Articulation?

A

A comfortable articulation of anterior teeth that is necessary for anterior guidance (separation of posterior teeth in eccentric movements).

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6
Q

What is MIP?

A
  • Maximum Intercuspation - A closed contacting and static relationship of the teeth
  • total contacting area may not exceed 4 mm
  • Nature provides a consistency to occluding parts
    1. Elevations and Depressions
    2. Cusps and Fossae
    3. Ridges and grooves
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7
Q

The USAF follows the Occlusal Philosophies of?

A

Stuart

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8
Q

Define Gnathology -

A

The science that treats the biology of the masticatory system as a whole - ie the morphology, anatomy, histology, physiology, pathology and the therapeutics of the jaws or masticatory system and the teeth as they relate to the health of the whole body, including applicable diagnostic, therapeutic, and rehabilitation procedures.

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9
Q

What are 8 characteristics of Organic Occlusion (Mutually Protected Occlusion)?

A
  1. CR occlusion
  2. Uniform contacts in CR
  3. Cusp-fossa occlusion
  4. Tripodism
  5. Cross-tooth stability
  6. Forces in the long axis
  7. Narrow Occlusal Table
  8. Disclusion
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10
Q

What are Closure Stoppers?

A

Distal incline of maxillary posterior teeth

Mesial inclines of mandibular posterior teeth

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11
Q

What are Equalizers?

A

Mesial incline of maxillary posterior teeth

Distal inclines of mandibular posterior teeth

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12
Q

What is the purpose of Closure Stoppers?

A

Stops closure of mandible as it relates to maxilla

Neutralizes forces exerted by equalizers

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13
Q

What is the purpose of Equalizers?

A

Equalizes forces exerted by closure stoppers, providing mesial-distal stability

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14
Q

What are some elements of occlusion, specifically elevations?

A
  1. Cusp Tips
  2. Marginal Ridges
  3. Triangular Ridges
  4. Central Ridges (Buccal/Lingual Contours)
  5. Supplemental Ridges
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15
Q

What are some elements of occlusion, specifically depressions?

A
  1. Supplemental grooves
  2. Developmental grooves
  3. Fossas
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16
Q

What are 4 advantages of Cusp to Fossa Occlusion?

A
  1. Forces in line with the long axis of teeth
  2. Eliminates the “plunger cusp” effect
  3. Greater stability to the dental arch
  4. Less tendency towards tooth mobility
17
Q

Which cusps are Stamp Cusps?

A

Maxillary Lingual Cusps

Mandibular Buccal Cusps

18
Q

Which cusps are Shearing Cusps?

A

Maxillary Buccal Cusps

Mandibular Lingual cusps

19
Q

How does one gain mesial to distal stability?

A

By closure of stoppers and equalizers

20
Q

How does one gain buccal to lingual stability?

A

By A, B, C contacts

21
Q

What is an “A” contact?

A

Shearing cusps of maxillary teeth occlude with stamp cusps of mandibular teeth

22
Q

What is a “B” contact?

A

Stamp cusps of maxillary teeth occlude with stamp cusps of mandibular teeth

***Most difficult to attain and maintain

23
Q

What is a “C” contact?

A

Stamp cusps of maxillary teeth occlude with shearing cusps of mandibular teeth

24
Q

Does A + B = stability?

A

Yes!

25
Q

Does C + B = stability?

A

Yes!

26
Q

Does A + B + C = stability?

A

Yes!

27
Q

What happens with A + C?

A

Maxillary teeth move buccally, mandibular teeth move lingually

28
Q

What happens with B only?

A

Maxillary teeth move lingually, mandibular teeth move buccaly

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