Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Dental Anatomy & Occlusion > Occlusion > Flashcards

Occlusion Flashcards

1
Q

Chewing is what type of lever?

A

Class 3, where effort (muscles) is between the fulcrum (TMJ) and the load (teeth/food)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Each maxillary tooth occludes with ___.

A

Counterpart and the tooth immediately distal to it

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Each mandibular tooth occludes with ___.

A

Counterpart and tooth immediately mesial to it

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Which mandibular tooth occludes with only one other tooth?

A

Mandibular central incisor

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Which maxillary tooth occludes with only one other tooth?

A

Maxillary third molar

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Every maxillary tooth is more ___ than its opposing counterpart.

A

Distal

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Axial loading of posterior teeth

A

Occlusal forces are applied along long axis of tooth

Cusp tip contact with fossa / MR

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Posterior teeth contact simultaneously. T/F

A

True

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What contacts are seen in protrusive jaw movements (protrusive excursion)?

A

Anterior contact, no posterior contact

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What contacts are seen in lateral excursive jaw movements?

A

Working side contact, no contact on non-working side

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Centric occlusion (CO)

A

Jaw position that is determined by the position of the teeth

Has maximum intercuspal position (maximum interdigitation) of the teeth

Cusps of teeth interpose themselves with cusps of opposing arch

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Reciprocal incline contact

A

Contact with opposing tooth is on the side of the cusp (not the tip) in posterior teeth

Tripod occlusion (groups of 3)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Which teeth participate in axial loading?

A

Posterior teeth

Anterior teeth have lighter contact, not conducive to axial loading

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What are alternative names for working cusps?

A

Functional, supporting, centric

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What are the functional cusps of maxillary teeth?

A

Lingual cusps

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What are the supporting cusps of mandibular cusps?

A

Buccal cusps

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

What are alternative names for non-working cusps?

A

Guiding, noncentric

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

What are the guiding cusps for maxillary teeth?

A

Buccal cusps

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

What are the noncentric cusps of mandibular teeth?

A

Lingual cusps

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

Which cusps of maxillary teeth would be blunt and rounded?

A

Lingual cusps

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

Which cusps of mandibular teeth would be sharp?

A

Lingual cusps

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

The lingual cusp line extends through the lingual cusp tips of ___ teeth.

A

Maxillary posterior

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

The buccal cusp line extends through the buccal cusp tips of

A

Mandibular posterior

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

Deep bite / overbite

A

Maxillary anterior teeth have extreme overlap to mandibular teeth

Can cause decreased vertical facial height

Strong anterior guidance (mandibular incisors touch lingual side of maxillary incisors quickly in protrusion and slide down entire length of lingual surfaces, causing rapid disclusion)

Can cause palatal damage if severe

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

What are the key characteristics of overbite / deep bite?

A
  • -Maxillary anterior overlap
  • -Strong anterior guidance
  • -decreased vertical facial height
  • -rapid disclusion with protrusion
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

The lack of anterior guidance during protrusion is characteristic of overbite. T/F

A

False, strong anterior guidance is seen in overbite, a lack of anterior guidance is seen in open bite

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

Open bite characteristics

A
  • -Lack of anterior guidance during protrusion
  • -Anterior teeth don’t touch
  • -Face appears longer (increased vertical facial height)
28
Q

Decreased facial height can be seen with ___ while a longer face can be seen in ___.

A

Overbite, open bite

29
Q

Crossbite characteristics

A
  • -Mandibular buccal cusps are buccal to maxillary buccal cusps
  • -Unilateral or bilateral
  • -Can be corrected
30
Q

Overjet

A
  • -Protrusion of teeth
  • -Increased horizontal distance between lingual surface of maxillary incisors and facial surface of mandibular incisors
  • -Increased horizontal overlap forces a decrease in posterior cusp length
31
Q

How does overjet and overbite differ?

A

Overbite has increased vertical overlap of maxillary and mandibular incisors
Overjet is increased horizontal distance between maxillary and mandibular incisors

32
Q

Where do maxillary premolars contact occlusally?

A

Lingual cusp contact the distal fossa of antagonist

33
Q

Where do maxillary molars contact occlusally?

A

The mesiolingual cusp contacts the central fossa of antagonist

The distolingual cusp contacts the distal MR of antagonist and mesial MR of distal tooth

34
Q

Where do mandibular premolars contact occlusally?

A

The buccal cusp contacts the mesial MR of antagonist

35
Q

Where do mandibular molars contact occlusally?

A

The mesiobuccal cusp contacts the mesial MR of antagonist and the distal MR of mesial tooth

The distobuccal cusp contacts the central fossa of antagonist

36
Q

Bruxing

A

Grinding of teeth
Accompanied by clenching of jaw
Can occur during sleep
Causes problems in ear, jaw, neck, throat, mouth, teeth, eyes, headache, abfraction (non-carious tooth loss near gingiva)

37
Q

What is the key sign of bruxing?

A

When you see teeth out of position

38
Q

Working side

A

The side that the mandible moves towards in lateral excursion (laterotrusive)

39
Q

Non-working side

A

The side that moves towards the midline (mediotrisve, balancing)

No occlusion on non-working side

40
Q

___ is moving the mandible forward in an anterior-posterior plane.

A

Protrusion

41
Q

___ is moving the mandible backwards in an anterior-posterior plane.

A

Retrusion

42
Q

Which movement is an almost straight lateral movement?

A

Working movement

43
Q

Which movement is a more diagonal movement?

A

Non-working movement

medial, anterior, down

44
Q

Excursive mandibular movements cause increased axial loading. T/F

A

False, they result in lateral loads on teeth

45
Q

In a protrusive movement, which teeth contact?

A

Anterior teeth contact for guidance

Posterior teeth separate / disocclude

46
Q

Anterior guidance

A

Incisors and canines guide the mandible in protrusion and lateral excursion, make up anterior determinant of mandibular movement

Controlled by dentists through: restoration, equilibration, or orthodontics
Also determined by TMJ and neuromuscular system (not controlled)

47
Q

How does overjet and overbite affect posterior teeth?

A

Overjet causes posterior cusps to be shorter, while overbite allows posterior cusps to be longer

48
Q

What are the guiding cusps?

A

Maxillary buccal and mandibular lingual

49
Q

What are the function of the guiding cusps?

A

Guide the supporting cusps out of occlusion in contact movements

Protect the cheek and tongue from being bitten

50
Q

What is considered the ideal guidance in working side contacts?

A

Canine guidance by lingual surface of maxillary canine

51
Q

Canine guidance

A

In lateral excursion, the lingual surface of the maxillary canine takes on lateral load
–Ideal guidance

52
Q

Group function

A

In lateral excursion, the buccal cusps of maxillary posterior teeth take on lateral load
–Occurs when no canine guidance is seen (position/length of canine is irregular)

53
Q

What is an alternative to canine guidance in lateral excursion?

A

Group function

54
Q

4 characteristics of supporting cusps

A
  • -Broader, more rounded
  • -Contact opposing tooth in maximum intercuspal position
  • -Support vertical dimension of face
  • -Contact near buccolingual center of opposing tooth
55
Q

The oblique ridge of the maxillary first molar opposed what structure?

A

Distobuccal groove of mandibular first molars

56
Q

The mesiobuccal cusp of the maxillary first molar passes through what structure?

A

Mesiobuccal groove of the mandibular first molar

57
Q

What is mutually protected occlusion?

A

In occlusion, the intercuspal position of posterior teeth protect the anterior teeth from excessive contact

Also, the anterior teeth protect the posterior teeth by disengaging the posterior teeth in excursive movements

58
Q

In normal occlusion, the working side has slightly more contact than the nonworking side. T/F

A

False, the nonworking side has no contact

59
Q

Destructive movements occur in ___ side contacts of the ___ cusps.

A

Nonworking (mediotrusive movements)

supporting

60
Q

The #13 lingual cusp broke. What movement caused it and with what tooth did it contact?

A

Lingual cusp of left maxillary second premolar is supporting

Left nonworking movement (mediotrusive)
Contacted buccal cusp of #20 (left mandibular 2nd premolar)

61
Q

Destructive movement is a ___ movement.

A

Non-working movement (mediotrusive)

62
Q

The #29 buccal cusp broke. What movement caused it and with what tooth did it contact?

A

Buccal cusp of right mandibular second premolar is supporting

Right non-working movement (mediotrusive)

Contacted lingual cusp of #4 (right mandibular second premolar)

63
Q

Centric relation

A

The mandibular jaw position where head of condyle is situated as far superior and anterior as possible in the mandibular fossa

64
Q

In centric relation, the head of the condyle is situated ___ and ___ in the ___.

A

Superior, anterior, mandibular fossa

65
Q

Bennett movement

A

Lateral excursion (shift) of mandible, due to movement of condyles in the mandibular fossa

Working side movement is almost straight lateral movement of condyle on same side that mandible is moving towards

Balancing side movement is diagonal movement of condyle on opposite side that mandible is moving towards

66
Q

In a Bennett movement, the balancing side movement is ___.

A

Diagonal

Dental Anatomy & Occlusion (4 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions