Nbde Dental Anatomy Occl-Inf

Front 1

What teeth should ideally provide guidance through full range of movement in lateral mandibular excursions?
What is this called?

Back 1

Canines
Canine or cuspid protected occlusion

Front 2

What are the characteristics of canine protected occlusion?

Back 2

Vertical overlap of Max & Mand canines produces separation of all posterior teeth

Front 3

Occlusion relationship in which there is contact of all teeth on the working side during lateral working movement

Back 3

Unilateral balanced occlusion
Group function

Front 4

What relationships are not conducive to cuspid protected occlusion?

Back 4

Class II or end to end relationship

Front 5

What relationships are not amenable to group function?

Back 5

Class II, Deep overlap

Front 6

Why is it essential to have no non-working side contacts?

Back 6

1. They are damaging
2. They are difficult to control due to Mand. flexure
3. They deliver more force to the teeth than other contacts

Front 7

In an ideal intercuspal position, the mesiobuccal cusp of the permanent max. second molar opposes what?

Back 7

The buccal groove of the Mand. second molar

Front 8

What is the key factor in a class I relationship?

Back 8

Mesiobuccal cusp of Max. first molar opposing mesiobuccal groove of Mand. first molar

Front 9

What does the distobuccal cusp of the max. first molar oppose?

Back 9

The distobuccal groove of Mand. first molar

Front 10

What does the distobuccal groove serve as an escapeway for?

Back 10

ML cusp of Max. first molar during non-working excursive movements

Front 11

When the Mand. moves right the ML cusp of the Max. Rt. first molar passes through where?

Back 11

Lingual groove of Mand. Rt. first molar

Front 12

What does the oblique ridge of the Max. first molar oppose?

Back 12

Developmental groove between the distobuccal and distal cusps of the Mand. first molar

Front 13

What are the guiding cusps of the teeth?

Back 13

Max. Buccal cusps
Mand. Lingual cusps

Front 14

Maxillary arch is positioned mesially, with the mesiobuccal cusp above the embrasure between the Mand. 1st molar and second premolar.max. Canine seated anterior to Mand. Canine.

Back 14

Class II relationship

Front 15

What is the difference between a class II division II vs. a class II division I?

Back 15

Class II Division II = Incisors more upright, less overjet, deeper overbite
Class II Division I = Incisors less upright, more overjet, shallow overbite

Front 16

Mandibular first molar is mesial to max. first molar. Mandibular arch is displaced mesially or the max arch is displaced distally, with mesiobuccal cusp of the max. first molar occluding distal to the buccal groove of the mand. first molar

Back 16

Class III relationship

Front 17

Mandibular first permanent molar is slightly anterior to the max. first permanent molar. Mesiobuccal cusp of Max. first molar is placed over the buccal groove of the mand. first molar.
Inaddition the max. canine is placed between the mand. canine and the mand. first premolar

Back 17

Class I occlusion

Front 18

What is it called if the mand. first molar is slightly anterior to the max. first molar but with other irregularities present elsewhere?

Back 18

Class I malocclusion

Front 19

Max. arch is positioned mesially, with the mesiobuccal cusp above or approaching the embrasure between the mand. first molar and the second premolar. The max. canine is also seated anterior to the mand. canine. Incisors normally display excessive anterior overjet.

Back 19

Class II Division I occlusion

Front 20

Broader, rounded cusps are an indication of what type of cusp?

Back 20

Supporting and working

Front 21

What are the five common characteristics of supporting cusps?

Back 21

1. Contact opposing tooth in ICP
2. Support vertical dimension
3. Nearer faciolingual center than non
4. outer incline has potential for contact
5. Broader, rounded cusps

Front 22

What are the supporting cusps?

Back 22

Max. lingual and Mand. buccal cusps.

Front 23

These cusps do grinding work because they occlude in a fossa or marginal ridge. Also sometimes called _____ _____ because they hold the occlusion in a middle position.

Back 23

Supporting/Working Cusps
Centric Cusps

Front 24

What are the non-supporting cusps?

Back 24

Max. buccal and mand. lingual cusps

Front 25

These cusps do not occlude or fit into fossae of marginal ridge areas. These cusps allow the dentition to move apart, out of occlusion. They allow the teeth to unlock and move back and forth and side to side

Back 25

non-supporting, balancing or non-centric cusps

Front 26

Under ideal conditions what two teeth only occlude with one other tooth from the opposing dentition?

Back 26

Mand. Central incisors and Max. Third Molars

Front 27

In an ideal ICP, the facial cusp tip of the permanent Max. second premolar opposes the...

Back 27

Facial embrasure between the Mand. second premolar and the Mand. first molar

Front 28

The facial cusp tip of a max. first premolar opposes the ...

Back 28

Facial embrasure between the mand. first and second premolars

Front 29

During a lateral excursive movement, the facial cusp ridge of the max. first premolar on the working side opposes what?

Back 29

Distal cusp ridge of the first premolar and the mesial cusp ridge of the second premolar

Front 30

In the intercuspal position, where does the distolingual cusp of a permanent max first molar occlude?

Back 30

The interproximal ridge areas between the mand. first and second molars.

Front 31

Where does the lingual cusp of the max. first premolar occlude?

Back 31

Distal triangular fossa of first premolar

Front 32

Where does the lingual cusp of the max. second premolar occlude?

Back 32

Distal triangular fossa of the second premolar

Front 33

Where does the mesiolingual cusp of the max. first molar occlude?

Back 33

Central fossa of first molar

Front 34

Where does the mesiolingual cusp of the max. second molar occlude?

Back 34

Central fossa of second molar

Front 35

Where does the distolingual cusp of the max. second molar occlude?

Back 35

Distal marginal ridge of the second molar and mesial marginal ridge of the third molar

Front 36

In the interproximal position, where does the distobuccal cusp of a permanent mand. first molar occlude?

Back 36

Cental fossa of max. first molar

Front 37

In ICP where does the buccal cusp of the Mand. first premolar occlude?

Back 37

Mesial triangular fossa of first premolar and distal marginal ridge of canine of Max.

Front 38

In ICP where does the buccal cusp of the Mand. second premolar occlude?

Back 38

Mesial triangular fossa of the second premolar of Max.

Front 39

In ICP where does the mesiobuccal cusp of the Mand. first molar occlude?

Back 39

Mesial marginal ridge of first molar and distal marginal ridge of second premolar (max.)

Front 40

In Icp where does the distal cusp of the Mand. first molar occlude?

Back 40

Distal fossa of first molar (max.)

Front 41

In ICP where does the mesiobuccal cusp of Mand. second molar occlude?

Back 41

Mesial marginal ridge of second molar and distal marginal ridge of first molar (max.)

Front 42

In ICP where does the distobuccal cusp of the mand. second molar occlude?

Back 42

Central fossa of second molar (max.)

Front 43

Which cusp of the permanent max. first molar serves as a reference point in identifying Class I, II, III occlusion?

Back 43

Mesiobuccal cusp

Front 44

What is the most common classification of occlusion?
What is the percentage?

Back 44

Class I 70%

Front 45

Mesiobuccal cusp of Max. first molar lines up approximately with the mesiobuccal groove of the mand. first molar. Max. centrals overlap mand. centrals. Max. Canine lies between the mand. canine and first premolar

Back 45

Class I occlusion

Front 46

What is the less common classification of occlusion and what is its percentage?

Back 46

Class II Occlusion 25%

Front 47

Mesiobuccal cusp of max first molars fall appox. between the mand. first and second premolar. Lower jaw and chin may also appear small and withdrawn. Mand. incisors occlude even more post. to max. incisors so they don't touch at all. Max. canine is mesial to mand. canine.

Back 47

Class II Occlusion

Front 48

What are the subclassifications of class II occlusions based on?

Back 48

Position of the incisors

Front 49

What is the least common classification of occlusion and its percentage?

Back 49

Class III occlusion less than 5%

Front 50

Mesiobuccal cusp of max. first molar falls approx. between mand. first molar and second molar. Chin may also protrude like a bulldog's does. Mand. Incisor overlaps anterior max. incisors. Max. Canine is distal to mand. canine.

Back 50

Class III occlusion

Front 51

What cusps are considered to be the guiding cusps?

Back 51

Max. buccal cusps
Mand. lingual cusps

Front 52

What are some other names for guiding cusps?

Back 52

Balancing
non-supporting
non-centric
shearing

Front 53

These cusps do not occlude or fit into fossae or marginal ridge areas on the opposite arch. They allow the dentition to move apart, out of occlusion. Allow the teeth to unlock and move back and forth and side to side

Back 53

Non-supporting cusps

Front 54

What are considered the supporting cusps of the dentition?

Back 54

Max. Lingual and Mand. facial cusps

Front 55

What are some other names of supporting cusps?

Back 55

Working, Stamp, Centric cusps.

Front 56

Areas of contact that a supporting cusp makes with opposing teeth

Back 56

Centric Stops

Front 57

Where do supporting cusps contact?

Back 57

Opposing teeth in their corresponding faciolingual centeron a marginal ridge or fossa.

Front 58

_____ overlap the opposing tooth without contacting it.

Back 58

Non-supporting cusps

Front 59

In _____ _____-_____ situations the supporting and guiding cusps are opposite.

Back 59

Posterior cross-bite

Front 60

What does the mand. first molars mesiolingual cusp oppose?

Back 60

Lingual embrasure of Max. first and second molars

Front 61

What does the mesiolingual cusp of mand. first molar oppose?

Back 61

Lingual embrasure of Ma. second and third molar

Front 62

What does the distolingual cusp of the mand. first molar oppose?

Back 62

Fits into the lingual groove of max. first molar

Front 63

What does the lingual cusp of permanent mand. first molars occlude with?

Back 63

Nothing

Front 64

Assuming normal occlusal relationships what surfaces of mand. molars are contacted by their antagonists in mand. movements?

Back 64

All areas of buccal and lingual cusps of the mand. except the outer aspect of the lingual cusp.

Front 65

In what type of occlusion will contact between mand. buccal cusps and max. buccal cusps, along with simultaneous contact between mand. lingual cusps and max. lingual cusps occur in laterotrusive movements?

Back 65

Unilateral balanced occlusion