introduction to occlusion Flashcards

1
Q

occlusion

A

the tooth to tooth relationship between the maxillary and mandibular teeth when the jaws are in a fully closed position

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2
Q

primate spaces

A

spaces between primary teeth that allow for the permanent teeth to erupt without crowding. occurs as the arches start to grow - so this is seen at approximately age 5

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3
Q

largest primate spaces

A

maxillary - between canines and laterals

mandibular - between canines and first molars

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4
Q

leeway spaces

A

primary teeth set occlusion pattern for permanent

deciduous molars and canines wider than permanent premolars and canines

space saved during mesial drift of permanent molars

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5
Q

mesial step

A

most children - mandibular molars are more mesial than maxillary molars

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6
Q

flush terminal plane

A

mandibular molars and maxillary molars are even

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7
Q

distal step

A

least common - mandibular molars more distal than maxillary molars

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8
Q

primary curve of spee

A

minimal

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9
Q

adult curve of spee

A

steeper

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10
Q

normal curve of spee

A

starts around the mesial of the 1st molar

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11
Q

premature curve of spee

A

starts closer to the premolars

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12
Q

late curve of spee

A

starts closer to the posterior of the 1st molar

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13
Q

sphere of monson

A

curve of spee and wilson combined

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14
Q

centric relation

A

a relationship of the upper jaw to the lower jaws

home base for the jaws

defined as the most retrueded relationship of the mandible to the maxilla

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15
Q

centric occlusion

A

a relationship of the upper teeth to the lower teeth

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16
Q

ideally, when the mandible is in CR…

A

the dentician should be in the centric occlusion

17
Q

overjet

A

horizontal measurement of anterior overlap

18
Q

underjet

A

horizontal distance of anterior teeth in crossbite

19
Q

interdigitation

A

maximum touching of maxillary and mandibular arches

20
Q

maximum intercuspation

A

the maximum closure of the maxillary and mandibular arches

21
Q

Class I

A

mesognathic

MB cusp of max 1st molar - mesiobuccal groove of mand 1st molar

max canine - mand canine & mand 1st molar

22
Q

inter-arch malocclusions

A
  1. midlines off-center
  2. posterior crossbite
  3. anterior crossbite
  4. open bite (anterior or posterior)
23
Q

intra-arch malocclusions

A
supraversion - above occlusal plane
infraversion - below occlusal plane
drifted mesial - tooth extracted
lingoversion - tooth positioned more lingual
torsoversion - rotated or twisted
24
Q

class II

A

retrognathic profile

25
class III
prognathic profile
26
centric occlusion
relationship of teeth in opposite arches; static position
27
abnormal proximal contacts
``` open contacts (extraction/ large maxillary frenum) drifting (due to extraction) pathologic migration (disease) ```
28
functional occlusion
associated with performance | all contacts during function of the oral cavity
29
functional contacts
normal contacts between max and mandibular teeth | momentary contacts
30
parafunctional contacts
abnormal contacts | occlusal habits and neuroses
31
class I molar relationship
MB cusp of max 1st molar -buccal groove of mandibular 1st molar
32
class I canine relationship
max canine - mand canine and mand 1st premolar
33
conditions that occur in class I malocclusion
malposition - individual teeth or groups of teeth crowded anterior teeth protruded or retruded max incisors
34
class II, division I
retrognathic profile buccal groove of mand 1st molar - distal to MB cusp of max 1st molar canine relationship: distal of mand canine distal to mesial of max canine
35
class II, division 2
buccal groove of mand 1st molar distal to MB cusp of max 1st molar canine relationship - distal of mandibular canine distal to mesial of max canine
36
class III
molar relationship: buccal groove of mand 1st molar - mesial to MB cusp of max 1st molar canine relationship - distal of mand canine mesial to mesial of max canine
37
partially anodontia
throws off molar relationship | uses canines to classify
38
edentulous
artificial occlusion