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Occlusion > Occlusal Schemes > Flashcards

Occlusal Schemes Flashcards

1
Q

Mediotrusive movement and contacts?

A

Non- working side movement

contacts of the teeth on the side opposite to the side toward which the mandible moves in articulation

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2
Q

Contacts on working side?

A

yes
contacts of teeth made on the side of the occlusion toward which the mandible has been moved

laterotusive movement

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3
Q

Immediate side shift

A

immediate 1 mm movement of the condyle

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4
Q

Immediate side shift

A

immediate 1 mm movement of the condyle

TRANSLATORY portion of lateral movement of the mandible in which the nonworking side condyle moves essentially straight and medially as it leaves centric relation

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5
Q

both immediate and progressive side shift are from which condyle?

A

NON - working side

the translating side

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6
Q

both immediate and progressive side shift are from which condyle?

A

NON - working side

the translating side

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7
Q

laterotrusive movement

A

working movement

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8
Q

pronouncing ‘S’ sounds appropriately determines which space?

A

inter-occlusal rest space - difference between VDR and VDO which is about 2mm?

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9
Q

*contacts during working side movement should do what?

A

DISARTICULATE the teeth on the non-working side

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10
Q

anterior and lateral excursions should be compatible with?

A

POSTERIOR CUSPAL ANATOMY TO AVOID POSTERIOR INTERFERENCES

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11
Q

non axial loading

A

opposing teeth contact on inclines
direction of force is not through the long axis of the tooth

TIPPING FORCES CREATED
this can cause compression and elongation in areas which overall leads to forces that are not effectively dissipated to the bone = complications

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12
Q

axial loading

A

cusp tip contacts FLAT SURFACES
the forces are directed vertically through the long axis of the teeth
force is well accepted by the periodontal ligament

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13
Q

bilateral tooth contacts + why do we need them

A

Simultaneous and even bilateral occlusal contacts
1. maximize mandibular movement
2. minimize the overall force to each tooth
STABILIZES bite and minimize forces to each tooth

even the contacts on posterior teeth to share the load of forces

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14
Q

what holds the vertical dimension?

implications?

A

POSTERIOR teeth - so we need to make sure we have even posterior contacts

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15
Q

name the occlusal schemes

A

canine guidance

group function

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16
Q

canine guidance

A

disclusion of all posterior teeth on working and non-working side when going into lateral movement
ONLY CANINES CONTACT ON THE WORKING SIDE

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17
Q

Importance of canine guidance
forces?
roots?
muscles?

A

canines are best suited to ACCEPT HORIZONTAL FORCES that occur during eccentric movements in addition to disarticualting the posterior teeth

longest and largest roots are surrounded by dense compact bone, which tolerates the forces better than does the medullary bone in posterior

FEWER MUSCLES are active when canines contact during eccentric movements than when posterior teeth contact, so lower levels of muscular activity would decrease the forces to the dental and joint structures

18
Q

group function contacts?

A

canines AND posterior teeth are touching/occluding on the working side (sharing load)
NO CONTACT on non-working side

canine and two pre-molars only = still considered group function

19
Q

anterior guidance

A

when mandible moves forward into protrusive contact, ONLY ANTERIOR TEETH SHOULD CONTACT to therefore disarticulate the posterior teeth

to LIMIT DAMAGING HORIZONTAL FORCES

20
Q

manipulation of anterior guidance?

A

horizontal and vertical overlap of the teeth

21
Q

mutually protected occlusion

A

posterior teeth –> provide protection during static loading and vertical forces

anterior teeth –> provide protection during dynamic loading and horizontal forces

22
Q

posterior teeth function in mutually protected occlusion

A

effectively accept forces applied during closure
their position in the arch is such that the forces can be directed through their long axes and dissipated efficiently
*most effective in stopping mandible during closure
static loading and vertical forces

23
Q

anterior teeth function in mutually protected occlusion

A

in position to accept the forces of ECCENTRIC mandibular movements
*most effective in guiding mandible

dynamic loading, horizontal forces

24
Q

specific protection in lateral movements?

A

canines

25
Q

specific protection in protrusive movements?

A

anterior teeth

26
Q

proximity of medial wall implication?

A

no or limited lateral translational movement occurs

27
Q

distance between medial wall and medial pole?

A

lateral translation movement occurs

bennet movement = working /rotating condlye

bennet angle = non-working

28
Q

condylar motion during laterotrusion?

A

bennett movement and bennett angle

29
Q

bennett movement

A

AKA lateral side shift

a lateral shift of the rotating condyle during laterotrusice or working movement of mandible

30
Q

bennett angle

A

immediate side shift + progressive side shift

the angle formed by the medial movement of the orbiting condyle during laterotrusive

(or working movement of mandible as viewed from the horizontal plane)

31
Q

the more medial the medial wall is from the condyle…

A

the greater the lateral translation movement will be

32
Q

in right mandibular movement describe R and L condyles

A

RIGHT = working/ rotating condyl and it is laterotrusive movement and produces the bennett movement

LEFT = orbiting / non-working condyle and is termed mediotrusive movement with a bennet angle occuring

33
Q

movement of non working condyle

A

translation
FORWARD, DOWN, MEDIALLY
down(inferior), out (forward / protrusive) and medially

34
Q

where is protrusive movement seen?

A

IN SAGITTAL plane

35
Q

where do you see/ observe the bennett angle?

A

Horizontal plane

36
Q

lucia jig

A

an anterior jig used to deprogram
made out of acrylic and fabricated outside of the mouth and then stable when placed inside the mouth

  • provides DISCLUSION OF POSTERIOR TEETH AS CLOSE TO MIP AS POSSIBLE
  • used in patients with upper and lower anterior teeth
37
Q

Frontal plane border and functional movement shape

A

shield shaped border movements

functional border = tear shaped

38
Q

where do functional movements start and where to border movements start?

A

Border = CR

Functional = MIP

39
Q

what affects the functional border in frontal plane?

A

CHEWING PATTERN

40
Q

frontal plane border movements

A
  1. left lateral superior border
  2. left lateral opening border
  3. right lateral superior border
  4. right lateral opening border

Occlusion (10 decks)

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