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Tooth Morphology > Occlusion > Flashcards

Occlusion Flashcards

1
Q

Functional Occlusion

A

Occurs during mastication and swallowing

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2
Q

Static Occlusion

A

Jaws are closed - centric occlusion

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3
Q

Mandibular Movements: depression

A

Open

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4
Q

Mandibular Movements: elevation

A

Closed

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5
Q

Mandibular Movements: protrusion

A

Forward

Guided by incisors

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6
Q

Mandibular Movements: retrusion

A

Backward

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7
Q

Mandibular Movements: lateral

A

Left-Right
Guided by canines
One side working, other side balancing

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8
Q

Centric Occlusion

A

“Habitual occlusion”
“Natural bite”
Usual or routine, maximum contacts

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9
Q

Centric Relation

A

Relationship of max/mand when condyle is rearmost in glenoid fossa - TMJ

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10
Q

Overjet

A

Max teeth overlap mand HORIZONTAL

1-3mm is normal

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11
Q

Overbite

A

Max teeth overlap mand VERTICAL
Incisal/middle/cervical
Normal/slight/severe

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12
Q

Intercuspation

A

Lingual cusps of max occluding w mand

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13
Q

Interdigitation

A

“antagonists”

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14
Q

Mesognathic

A

Even facial profile where max teeth slightly overlap mand

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15
Q

Molar Relation: normal

A

First molars - mand MB groove aligns w max MB cusp

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16
Q

Canine Relationship: normal

A

max occludes w distal half of mand + mesial half of 1st mand premolar

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17
Q

Retrognathic

A

Maxilla protrudes

Mandible appears weak/retruded

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18
Q

Molar Relationship: Class II

A

MB groove is distal to MB cusp by a premolar

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19
Q

Canine Relationship: Class II

A

Distal of mand is distal to the mesial surface of max by a premolar

20
Q

Class II, Division 1

A

Maxillary incisors protruded (overjet/overbite)

21
Q

Class II, Division 2

A

Max incisors retruded

Tilted toward mand incisors

22
Q

Prognathic

A

Prominent lower lip/mandible protruded

23
Q

Molar Relationship: Class III

A

MB groove mesial to MB cusp by a premolar

24
Q

Canine Relationship: Class III

A

Distal of mand is mesial to mesial of max by a premolar

25
Q

Labioversion

A

individual teeth positioned labial to normal (anterior)

26
Q

Linguoversion

A

individual teeth positioned lingual to normal

27
Q

Buccoversion

A

individual teeth positioned buccal to normal (posterior)

28
Q

Surpaversion

A

individual teeth elevated above line of occlusion

29
Q

Torsoversion

A

individual teeth rotated/turned

30
Q

Infraversion

A

individual teeth depressed below line of occlusion

31
Q

Crossbite

A

Quadrant of teeth that are facial or lingual to normal position

32
Q

Edge to Edge

A

Anterior incisor edges occlude instead of overlap

33
Q

End to end

A

Posterior cusps occlude

34
Q

Curve of Spee

A

Anterior - posterior curve

35
Q

Curve of Wilson

A

Mesial - lateral curve

36
Q

Lateral Occlusion

A

Guided by canines

Canines should be only teeth occluding “canine rise”

37
Q

Protrusive Occlusion

A

Guided by incisors

All 8 anteriors in contact

38
Q

Functional Contacts

A

Normal contact during chewing/swallowing, momentary

39
Q

Parafunctional Contacts

A

Tooth contact that directs the mandible away from CO

Outside range of normal function

40
Q

Parafunctional habits

A 
Clenching
Bruxism 
Tongue thrusting 
Sucking
Lip incompetence 
Mouth breathing
41
Q

Premature occlusion

A

Tooth that contacts first as jaw closes in CO
Contacts when should be disengaged
—> leads to traumatic occlusion

42
Q

Traumatic Occlusion

A 
Tooth mobility 
Sensitivity 
Migration 
Wear facets 
Open contacts
43
Q

Primary Occlusion: canines

A

Same as permanent

44
Q

Primary Occlusion: molars

A

Terminal plane relationships:

Mesial step or flush terminal plane

45
Q

Mesial Step

A

PRIMARY mand. 2nd molar is mesial to the maxillary 2nd molar

46
Q

Flush Terminal Plane

A

PRIMARY max and mandibular 2nd molars are end-to-end

47
Q

Distal Step

A

PRIMARY mand 2nd molar is distal to maxillary 2nd molar

Not ideal

Tooth Morphology (7 decks)

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