Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Occlusion > Posselt's Envelope of Movement > Flashcards

Posselt's Envelope of Movement Flashcards

1
Q

REFERENCE POSITIONS (3)

A
  • CENTRIC RELATION
  • MAXIMUM INTERCUSPAL POSITION
  • POSTURAL POSITION
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

CENTRIC RELATION

A

the position of the mandible in which the condyles are in the most superior and anterior position in the articular fossa, resting against the posterior slopes of the articular eminences with the articular discs interposed

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q 
CENTRIC RELATION (CR)
--- DETERMINED POSITION
A

CONDYLE

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

CR is (3)

A

repeatable
reproducible
recordable

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

when the mandible is in CR, the condyles can rotate around a horizontal axis up to an opening of — measured at the central incisors

A

20-25 mm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

if the opening of the mandible continues beyond 20-25 mm, then — of the mandible occurs

A

translation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

pure rotational movement is also referred to as — movement and the axis is referred to as —

A

hinge movement

terminal hinge axis

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

MAXIMAL INTERCUSPAL POSITION
OR MAXIMUM INTERCUSPATION
— determined position

A

tooth

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

MAXIMAL INTERCUSPAL POSITION
OR MAXIMUM INTERCUSPATION
does not provide any info about the

A

TMJ

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

in most people, MIP does not coincide with

A

CR

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

in MUP The condole-disc assembly is

A

anterior inferior and/or medial or lateral or a combo of the above compared to the position in CR

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

usually, the condyle disc assemblies are

A

anterior and inferior

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

when is MI used

A

clinically if the patient needs minimal restorations

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

position restorations are made in

A

MI

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

postural position

A

the habitual postural of the mandible when the patient is resting comfortably in the upright position and the condyles are in the neutral unstrained position in the glenoid fossa

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

in PP< there is an equilibrium between the

A

forces acting on the mandible

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

in the PP, the muscles are not totally

A

relaxed

there is a degree of electromyographic activity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

PP is determined by the

A

muscles and the forces of gravity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

PP does not give us information about the

A

condyles or the teeth

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

in PP, the condyles are usually

A

anterior and inferior compared to their CR position

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

PP can be – and is — for the patient

A

sustained

comfortable

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

in PP, the teeth are

A

apart and there is a wedge space between the teeth

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

the wedge shaped space is called the

A

interocclusal space

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

interocclusal space is usually –mm between the incisors, –mm between the premolar, and –mm between the molars

A

2-3
2
3/4-1

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

there is a -:- ratio from anterior to posterior

A

1:3

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

PP is clinically used to determine the

A

OVD in edentulous patients or in patients with severely worn dentition

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

the OVD is the distance measure between two points when the

A

occluding members are in contact

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
28
Q

the vertical dimension at rest (in PRP) is usually — greater than the occlusal vertical dimension

A

2-3mm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
29
Q

type of movement (3)

A

rrotation
translation
combo

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
30
Q

the mandibular movements are limited by the (3)

A

ligaments,
the articular surfaces of the TMJ,
and the morphology and alignment of the teeth

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
31
Q

the outer range of movement is reproducible and called

A

border movements

32
Q

when do functional movements occur

A

during functional activity of the mandible

33
Q

functional movements are confused within the

A

border movements

34
Q

functional movements begin and end in the

A

MI position

35
Q

BORDER AND FUNCTIONAL MOVEMENTS

IN THE SAGITAL PLANE

A

Posselt’s Envelope of Movemet

36
Q

movement components in sagittal plane (4)

A

posterior opening border
anterior opening border
superior contact border
functional movements

37
Q

envelope of motion is –

A

3D

38
Q

envelope of movement is a combo of borer movements in all three planes:

A

sagital
horizontal
frontal

39
Q

the envelope differs from person to person but it has the same

A

characteristic shape

40
Q

during opening of the mouth the condyles will move

A

forward and down the articular eminence

41
Q

maximum opening is reached when

A

capsular ligaments prevent further movement

42
Q

anterior opening border movement represents the

A

movement from max opening to max protrusion

43
Q

the max protrusion is determined partly by the

A

sytlomandibular ligaments

the condyles are in the most anterior position

44
Q

superior contact border movement:

the initial tooth contact occurs between the – inclines of the max teeth and the – inclines of the mand teeth

A

mesial

distal

45
Q

superior contact border movement:

the mandible will then move

A

superioanteriorly (shift) until the max intercuspation occurs. there may also be a lateral component to the shift

46
Q

the average distance between CR MIP in 90% of the population is

A

1.25 +/- 1 mm

47
Q

superior contact border movement:

the mandible moves forward from MIP to edge to edge. this is determined by the

A

lingual surface of the max anterior teeth. the pathway inclines inferiorly

48
Q

superior contact border movement:

from edge to edge the mandible can move

A

further horizontally for the width of the incisal edges

49
Q

superior contact border movement:

continued forward movement of the mandible. with the anterior teeth in contact, results in

A

superior movement guided by the lingual surfaces of mandibular anterior teeth

50
Q

superior contact border movement:

continued forward movement of the mandible is guided by the

A

posterior teeth until the mandible reaches max protrusion

51
Q

the chewing stroke

A

starts at the MIP and drops downwards and forwards to the position of desired opening

52
Q

the chewing stroke returns in a

A

straighter pathway slightly posterior

53
Q

BORDER AND FUNCTIONAL MOVEMENTS IN
THE HORIZONTAL PLANE:
pattern

A

rhomboid shaped

54
Q

BORDER AND FUNCTIONAL MOVEMENTS IN
THE HORIZONTAL PLANE:
four movement components

A

left lateral border
continued left lateral border with protrusion
right lateral border
continued right lateral border with protrusion and functional movements

55
Q

contraction of the right inferior lateral pterygoid causes the right condyle to move

A

anteriorly and medially

the left inferior lateral pterygoid relaxes

56
Q

left lateral border movement:

left condyle

A

rotating or working condyle

57
Q

left lateral border movement:

right condyle

A

orbiting or non working

58
Q

left lateral border with protrusion:
from the left lateral the left inferior lateral pterygoid starts to contract (right stays contracted) and causes the left condyle to move

A

anteriorly and to the right to max protrusion

59
Q

right lateral border movement:

A

the exact opposite to the left lateral border movement occurs

60
Q

right lateral border with protrusion:

A

the exact opposite to the left lateral border with protrusion occurs

61
Q

functional movements occur near

A

MIP

62
Q

functional movements:

the outer range of movement is greater in

A

early stages of mastication

63
Q

functional movements:

the outer range of movement is smaller in the

A

late stages of mastication

64
Q

BORDER AND FUNCTIONAL MOVEMENTS IN THE
FRONTAL PLANE:
pattern

A

shield shaped

65
Q

BORDER AND FUNCTIONAL MOVEMENTS IN THE
FRONTAL PLANE:
four distinct movement components

A

left lateral superior border
left lateral opening border
right lateral superior border
right lateral opening border and functional movements

66
Q

left lateral superior border:

from MIP the mandible moves to the

A

left

67
Q

left lateral superior border:

the path is determined primarily bu the

A

morphology and inter arch relationship of the teeth

68
Q

left lateral superior border:

the max lateral border position is determined by the

A

ligaments of the rotating condyle

69
Q

left lateral opening border:

path

A

lateral convex path

70
Q

left lateral opening border:

as maximum opening approaches, ligaments

A

tighten and produce a medial shift

71
Q

RIGHT LATERAL SUPERIOR BORDER

A

similar to the left lateral superior border

72
Q

RIGHT LATERAL

OPENING BORDER

A

similar to the left lateral opening border

73
Q

FUNCTIONAL MOVEMENTS:

occur near

A

MIP

74
Q

FUNCTIONAL MOVEMENTS:

occur within the

A

outer range of the border movements

75
Q

ENVELOPE OF MOTION:

the superior surface of the envelope is determined by the

A

tooth contacts

76
Q

ENVELOPE OF MOTION:

the other borders are primarily determined by the

A

TMJ anatomy and the ligaments

Occlusion (15 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions