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dhyg 107 > Occulsion > Flashcards

Occulsion Flashcards

1
Q

What is occulsion?

A

Relationship between Maxillary and mandibular teeth when jaw is in fully closed position.

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2
Q

What are the 3 phases of arch form?

A

1) Anterior teeth
2) Middle- premolars
3) Posterior teeth

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3
Q

When does occlusion develop in a child?

A

as primary teeth ERUPT

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4
Q

Occlusion of erupting permanent dentition is dependent on primary teeth shedding with the exception of ______?

A

Permeant molars; these erupt distal to primary dentition.

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5
Q

Occlusion develops in the permanent dentition as primary teeth are ______?

A

Shed

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6
Q

Teeth are one factor of occlusion, what are other factors?

A

Musculature
Neuromuscular patterns,
TMJ function
Tongue functions
Orofacial behaviors/habits

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7
Q

What are some factors to poor occlusion?

A
  • Periodontium cant function properly
    -Recession
    -Occlusal trauma
    -Difficult for pt to keep clean
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8
Q

When teeth are properly aligned in occlusion what occurs?

A

-Teeth are self cleansing by cheek musculature & saliva

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9
Q

T or F - Occlusal trauma is NOT a direct cause of perio disease, but it may be an adverse factor in already weak disease dentition

A

True

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10
Q

What is centric occlusion/ Habitual occlusion/ maximum Intercuspation?

A

Voluntary position that allows maximum contact when teeth occlude. “Tightest fit”

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11
Q

T or F Normal or ideal occlusion rarely exist?

A

True

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12
Q

Each tooth is in occlusion with TWO other teeth in the opposing arch. Which teeth are the exceptions?

A

Mandibular Central incisors & Maxillary third molars

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13
Q

What happens to occlusion if a tooth is lost?

A

Supereruption
Mesial drift
loss of proper function

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14
Q

When teeth occlude in CO, the maxillary arch HORIZONTALLY overlaps the mandibular arch, this is referred to as?

A

Overjet

  • think jets fly horizontal
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15
Q

How many mm is considered normal Overjet?

A

1-3mm

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16
Q

In CO maxillary arch also vertically overlaps the mandibular arch which is referred to as ______?

A

Overbite

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17
Q

What is considered normal overbite?

A

2-5mm or 20-30%
Max teeth cover incisal 1/3 of mandibular teeth

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18
Q

What is another name for underbite

A

Retrognatha

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19
Q

When the mandibular arch extends beyond the maxillary arch this is called?

A

Underbite

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20
Q

Each tooth have two adjacent contacts except which one?

A

Third molars

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21
Q

When two teeth in the same arch come into contact, the curvatures next to the contact areas form spaces called?

A

Embrasure spaces “V shaped”

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22
Q

Open contacts allow food impaction from opposing cusps resulting in tissue trauma, the opposing cusps are called ______?

A

Plunging cusps

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23
Q

How many phases in arch development?

A

5

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24
Q

What occurs in phase 1 of arch development?

A

permanent first molars erupt

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25
Q

What occurs in phase two of arch development?

A

Eruption of permanent anterior teeth

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26
Q

What occurs in phase 3 of arch development?

A

begins when permanent premolars erupt

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27
Q

What occurs in phase 4 of arch development?

A

begins when permanent canines erupt between laterals and 1st premolars

28
Q

What occurs in phase 5 of arch development?

A

Final phase; dental arch form and eruption of 3rd molars

29
Q

What is curve of spee?

A

Anteroposterior curve (
Imaginary line on masticatory surface)

30
Q

In curve of spee Maxillary arch _______ and mandibular arch ______?

A

Convex ; concaves

31
Q

Curve of wilson?

A

Concave curve through molars

32
Q

What are the 3 areas of centric stops?

A

1) Height of cusp contour
2) Marginal ridges
3) Central fossae

33
Q

What is the defintion of centric stops?

A

Supporting cusps that function during centric occulsion

34
Q

What are the supporting cusps? (function during mastication)

A

Maxillary palatal (lingual cusps) and mandibular buccal cusps

35
Q

what is used to check centric stops?

A

articulating paper

36
Q

This process continues until there is wear and attrition until development of a flat surface is considered a _____?

A

Wear facet

37
Q

When is centric relation? (Retruded contact position)

A

Most posterior position of mandible carried by musclature and ligaments (end point)

38
Q

CO can be attained by having a patient who is in CR squeeze ______?

A

teeth together after achieving CR.
* occurs during swallowing

39
Q

Rare but ideal permanent occlusion is when ______?

A

CR & CO are in occlusion

40
Q

What is lateral occlusion or canine rise?

A

moving mandible side to side until opposing canines are edge to edge.

41
Q

All 8 incisiors are in contact as mandible protrudes, this is called?

A

Protrusive occlusion

42
Q

What is ideal primary occlusion?

A

terminal plane or mesial step

43
Q

What is non-ideal molar relationship in primary occulsion?

A

Distal step

44
Q

when teeth are in centric occlusion, each tooth of one arch is in occlusion with two others of the opposing arch…except for?

A

anterior

45
Q

What is open bite?

A

When teeth DO NOT occlude

46
Q

What maloccluision is an end to end bite?

A

Anterior teeth are edge to edge in CO

47
Q

What malocclusion is a cross bite?

A

Mandibular teeth are FACIALLY to maxillary teeth

48
Q

For primary occlusion what is flush terminal plane mean?

A

Primary molars and mandibular 2nd molars are end to end

49
Q

What facial profile is a class I?

A

Mesognathic

50
Q

What facial profile is class II malocclusion?

A

Retrognathic (retrusive) or convex

51
Q

What facial profile is Class III malocclusion?

A

Prognathic (Protrusive)

52
Q

How many occlusal contacts for 32 teeth?

A

138

53
Q

What can malocculsion attritube to ?

A

Tooth wear, bone loss, loose teeth, joint pain

54
Q

Most common problem of malocclusion?

A

Crowding

55
Q

Malocculsion occurs in what percentage of teens/kids?

A

80%

56
Q

What is class I malocclusion?(Nuetroculsion)?

A

-MB cups of max 1st molar occludes w/ MB groove of mand 1st molar
-max canine occludes w/ distal 1/2 of mand canine & mesial half of mand 1st premolar

57
Q

What is class II malocclusion relationship? (distocclusion)

A

Molar- max 1st occludes mesial to MB groove of mand 1st molar
Canine- Distal of mand canine to distal mesial of max canine by width of premolar

58
Q

Class III malocculsion relationship? (mesioclusion)

A

molar- MB cusp of max 1st molar occludes distal of MB groove of mand 1st
canine- distal surface of mand canine is distal to mesial of maxillary canine

59
Q

Mandibular anteriors are in crossbite with maxillary anteriors in what class?

A

Class III

60
Q

Which class has a prognathic prominent mandible with normal or retrusive (concave profile) maxillary?

A

Class III

61
Q

What are parafunctional habits?

A

Movements of mandible within normal range of motion associated w/ mastication, speech, respiraton movements.

62
Q

Example of parafunctional habits?

A

Clenching, Bruxism, Thumb sucking

63
Q

What are parafunctional habits related to?

A

Attrition, scalloped tongue, non carious cervical lesion, linea alba

64
Q

Treatment for parafunctional habits?

A

Myofunctional therapy or oral appliances

65
Q

T OR F classifications dont work for primary or mixed dentition?

A

True

66
Q

What is Class II division I?

A

Severe overjet & deep overbite
Incisors are proclined.

67
Q

What is Class II Division II?

A

Maxillary anterior show lingual inclination and may overlap canine or incisors. excessive deep bite / reduced overjet

dhyg 107 (3 decks)

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