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occlusion final > final test > Flashcards

final test Flashcards

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1
Q

two joints of TMJ

A

ginglymoid and arthodial

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2
Q

ginglymoid movement

A

hinge

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3
Q

arthodial movement

A

gliding

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4
Q

functioning part of mandibular fossa

A

articular eminence

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5
Q

non functioning part of mandibular fossa

A

articular fossa

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6
Q

what ligaments of the mandible limits protrusion

A

stylomandibular

sphenomandibular

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7
Q

what ligament(s) prevents mandible from going too far back

A

colateral ligaments (2 parts)

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8
Q

two parts of collateral ligament

A

internal horizontal portion

outer oblique portion

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9
Q

action of temporal is muscle

A

eleveate and retrude mandible

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10
Q

insertion of temporalis

A

coronoid process
anterior border or ramus
temporal crest

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11
Q

orgin and insertion of medial pterygoid muscle

A

orgin- pterygoid fossa

insertion- medial angle of mandible

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12
Q

lateral pterygoid muscle action

A

both, protrude, depress mandible

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13
Q

orgin and insertion of lat. pterygoid

A

orgin- lateral pterygoid plate

insertion- condylar process of mandible

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14
Q

orgin and insertion of digastric

A

orgin-
post- mastoid notch
ant- medial angle of mandible

insertion-
post and ant.- hyoid

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15
Q

what muscles protrude mandible

A

both lat. pterygoids together

masseter and medial pterygoid

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16
Q

innervatoin of TMJ

A

auriculotemporal (part of CN V)

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17
Q

main innervation of muscle of mastication

A

Trigeminal

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18
Q

3 arteries of the TMJ

A

superficial temporal
middle meningeal
internal maxillary

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19
Q

if the force vector passes through the bite point what does that mean

A

TMJ does not need to be loaded, does not function as a lever

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20
Q

what species is TMJ not loaded?

A

rat

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21
Q

red fox has carnassial teeth meaning what

A

teeth for tearing food

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22
Q

pinnate muscle arrangement is a _____ saving adaptation

A

space

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23
Q

power generating muscle arragnement

A

pinnate

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24
Q

movement muscle arrangement

A

strap

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25
which muscles of mastication are strap?
lat. pterygoid | digastrics
26
most efficient class system (jaw muscle-Joint lever)
1st class
27
lever efficiency depends on ratio of..
d1 and d2. decrease this number correlates to increase efficiency
28
example of 1st class
(PFW) axis of cervical spine
29
example of 2nd class
PWF wheelbarrow. front view of mandible
30
example of 3rd class
least efficient, biting, drawbridge
31
d1 is between which two variable
F and W
32
(MA) mechanical advantage along the mandible _______ with the distance from the TMJ
increases
33
muscle fibers that express ____ types of myosin are found _____ to the joint and vise versa with ____ types
fast close slow
34
two phases of closing movement
crushing and guiding
35
chewing stroke on working side
incisors and molars start anteriorly at opening and returns from a posterior position
36
great lateral movement when food is ____ into mouth
introduced
37
harder food creates ____ chewing strokes
broader
38
greatest amount of force during mastication is placed what two teeth area
2nd premolar, 1st molar
39
somatic swallowing
during swallowing teeth come together in MI position to stabilize the mandible in order for the supra hyoid and infra hyoid to contract and control
40
viceral swallow
occurs in infants and adults with no teeth. mandible is braced by placing the tongue forwards and between the dental arches or gum pads
41
M sound used for what
evaluate the amount of incisal display at rest
42
functional response of the alveolar bone and gingival fibers surrounding the teeth help them drift how
mesial, towards the midline
43
mandibular teeth, all inclined which direction
mesial, posterior also slightly lingually
44
max teeth anterior inclined where? posterior?
anterior- mesially inclined | post- distall inclined, also bucally
45
two planes of occlusion
curve of sped | curve of wilson (both concave)
46
curve of spee
anteriorposterior
47
curve of wilson
bucall lingual
48
occlusal table
area of a posterior tooth between the buccal and lingual cusps
49
which arch is smaller length wise
mandibule
50
what is the vertical dimension of occlusion at rest
2-3 mm
51
centric cusp do what
maintaining the vertical dimension of occlusion and triturate food during mastication
52
noncentric cusp
maintain the bolus of food on the occlusal table during mastication, they assist in shearing food and minimize tissue impingement.
53
centric relation
anterior-superior most retruded condyle position bilaterally most retruded functional position of the mandible teeth not required
54
what ligament in the TMJ limits normal rotational opening movements?
outer oblique
55
what ligament in the TMJ limits the posterior movement of the condyle and sic
inner horizontal
56
what ligament limits protrusive movement of the mandible
stylomandibular
57
in centric relation what is RCP?
first tooth contact on arc of closure
58
two movements of border diagram
condylar rotation 20-25 mm | condylar translation 50 mm
59
functional range of movement is what
diastase between ICP and CR in border diagram
60
movement in transverse plane is called what
gothic arch tracing
61
deviations during opening/closing is caused by what
usually by disc derangements.
62
deflection caused by what
extra or intra intracapsular disorders
63
crepitation
multiple gravel like sound and commonly associated with osteoarthritic changes of the articular surfaces of the joint
64
what percentage of people have CR coincide with ICP
10%
65
type of disclusion in lateral excursive movements
``` canine disclusion balance occlusion (group function) ```
66
history of occlusion, 1925 sears called it
balanced occlusion
67
new centric relationship
condyles are in their most superoanterior position. coincides with (MS) musculoskeletally
68
lowest EMG recording of muscles at what two measurements
7-8 mm | 2-4 mm
69
optimal tooth contacts is what
even and simultaneous contact with as many teeth as possible. (less load is transferred to joint)
70
forces on teeth are directed through the ____ _____
periodontal ligament
71
axial loading
process of directing occlusal forces through the long axis of the tooth
72
axial loading methods...tooth contacts on either _____ or ______
cusp tips | relatively flat surfaces that are oriented perpendicular to the long axis
73
axial loading method on cusp tips called what
tripodization
74
T/F anterior teeth can with stand greater forces applied to them
false, posterior teeth can.
75
which teeth are suited best to withstand horizontal forces
canines
76
canine guidance is what
max. and mand. canines contact in laterotrusive excursions | this disoccludes the posterior teeth
77
alternative to canine guidance
group function
78
which teeth would you rather participate in group function
pre molars or MB cusp of 1st molar. posterior = undesirable
79
anterior disclusion is what
during protrusive movements you have no posterior contacts
80
T/F you want posterior contacts heavier than anterior?
True
81
condylar guidance is considered to be a ______ factor
fixed. because is inalterable in a healthy patient.
82
the more the plane of occlusion diverges from the angle of the eminentia=
the longer the cusps
83
the more parallel the plane of occlusion to the angle of the eminentia=
the shorter the posterior cusps
84
what are two factors affecting bennett movement (side shift, LTM)
``` medial wall (more medial greater the LTM) TM ligament ```
85
posterior teeth located distal to the radius will need ____ cusps than those located mesial to the radius
shorter
86
longer radius (curve of spee) =
flatter place of occlusion
87
the more immediate the lateral translation, the _____ is the posterior cusp
shorter

occlusion final (1 decks)

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