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BDS3 CLINICAL Occlusion > Occlusion 2 > Flashcards

Occlusion 2 Flashcards

1
Q

What are the two ways of examining the occlusion

A

dynamic

static

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2
Q

How can we mark tooth contacts

A

using millers forceps and fine articulating paper

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3
Q

When do we mark tooth contacts

A

before prepping a tooth
before removing a restoration
after placement of a crown
after placement of a restoration

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4
Q

What are tripodised contacts

A

show were the opposing cusps contact (ICP stops)

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5
Q

What can be accessed in the static occlusion

A 
incisor relationship
molar relationship
overjet/overbite
cross bites
open bites
individual tooth contacts
RCP-ICP slide (freedom in centric)
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6
Q

What are the functional cusps

A

these are the cusps that occlude with the opposing teeth in the intercostal position

palatal cusps of upper posteriors

buccal cusps of lower posteriors

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7
Q

What are the non functional cusps

A

cusps that do not occlude with the opposing teeth in ICP

buccal cusps of the upper posterior teeth

lingual cusps of the lower posterior teeth

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8
Q

What is a fossa

A

it is a depression or concavity on a tooth surface

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9
Q

What are the ICP contacts

A

lingual cusps of an upper molar contacts the fossa of a lower molar

buccal cusps of a lower molar contacts the fossa of an upper molar

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10
Q

What is class I angles classification

A

normal

incised edge into cingulum

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11
Q

What is class II div 1 angles classification

A

overjet increased

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12
Q

What is class II div 2 angles classification

A

overbite increased

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13
Q

What is class III angles classification

A

reverse overjet

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14
Q

What is an overbite

A

vertical overlap of the incisors

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15
Q

What is an overate

A

relationship between upper and lower teeth in a horizontal plane

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16
Q

What is a cross bite

A

conditions where 1 or more teeth may be abnormally malpositioned buccal or lingually or labially with reference to opposing teeth

17
Q

What is an anterior open bite

A

lack of vertical overlap in anterior teeth when posterior teeth in full occlusion

18
Q

What is a posterior/lateral open bite

A

failure of contact between the posterior teeth when teeth are in full occlusion

19
Q

What is canine guidance

A

when mandible moves to the working side the only contact is between canines

no posterior tooth contacts

this is a mutually protected occlusion

20
Q

What is the gold standard occlusion

A

mutually protect occlusion

21
Q

What is a mutually protected occlusion

A

canine guidance
posterior disclusion in lateral excursions
no non-working/working side contacts
no protrusive interferences

22
Q

What is group function

A

mandible moves to working side
multiple teeth in contact on the left
bilateral group function frequently seen in tooth wear

23
Q

What is protrusion

A

condyle moves forward and downwards on articular eminence
only incisors +/- canines touch
no posterior tooth contacts

24
Q

What are types of occlusal interferences

A

working side
non working side
protrusive

25
Q

What is a working side contact

A

similar cusps contact

26
Q

What is a non working side contact

A

dissimilar cusps contact

27
Q

What is a protrusive interference

A

any posterior contact during protrusion

28
Q

Why avoid posterior contacts

A

they are designed to absorb heavy forces in the direction of the long axis of the tooth

not designed to absorb significant lateral forces generated by occlusal interferences

muscles get less rest so become painful

29
Q

What are the two types of bruxism

A

eccentric

centric

30
Q

What is eccentric bruxism

A

parafunctional grinding of teeth
an oral habit consisting of involuntary rhythmic or spasmodic or functional gnashing, grinding, clenching of teeth in other than chewing movements of the mandible which may lead to occlusal trauma

31
Q

What is centric bruxism

A

clenching: pressing and clamping of the jaws and teeth together

frequently associated with acute nervous tension or physical effort

32
Q

What are clinical signs

A 
tooth wear 
fractured restorations
tooth migration 
tooth mobility (often in absence of periodontal disease)
muscle pain and fatigue
headache 
earache 
pain and stiffness in the TMj and surrounding muscles
33
Q

What are the types of tooth wear

A 
multifactorial
abrasion
attrition
erosion
abrfraction
34
Q

What is occlusal trauma

A

injuring resulting in tissue changes within the attachment apparatus, including the PDL, supporting alveolar bone and cementum as a result of occlusal forces

35
Q

What is primary occlusal trauma

A

intact periodontium

36
Q

What is the secondary occlusal trauma

A

reduced periodontium

37
Q

What is fremitus

A

palpable or visible movement of a tooth when subjected to the occlusal forces

38
Q

What is an examination checklist

A 
incision relationship
guidance
overjet/overbite
ICP contacts
working/non working
pathology

BDS3 CLINICAL Occlusion (3 decks)

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