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NBDE dental anatomy > page 662-671 > Flashcards

page 662-671 Flashcards

1
Q

Functional occlusion:

A

Occlusion during mandibular movement (mastication,

swallowing, etc.).

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2
Q

Plane of occlusion:

A

An imaginary plane anatomically related to the cranium

that theoretically touches the incisal edges of incisors and the cusp

tips of posterior teeth.

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3
Q

Occlusal adjustment (equilibration):

A

Reshaping the occlusal surfaces of

teeth to create harmonious contacts between the maxillary and mandibular

teeth.

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4
Q

Vertical dimension:

A

A vertical measurement of the face between any two

arbitrary points (usually in the midline), one above and one below the

mouth.

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5
Q

Vertical dimension of occlusion (VDO):

A

The vertical dimension of the

face when the teeth are in centric occlusion

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6
Q

Vertical dimension of rest (VDR):

A

The vertical dimension of the face

when the mandible is in the rest position.

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7
Q

Curve of Spee:

A

The anteroposterior curvature of the maxillary and

mandibular occlusal surfaces. Concave above the curve; convex below the

curve. (See Figure 27–1.)

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8
Q

Curve of Wilson:

A

The mediolateral curvature of the maxillary and

mandibular occlusal surfaces. Concave above the curve; convex below the

curve. (See Figure 27–2.)

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9
Q

Compensating curve:

A

The anteroposterior curvature (in the median

plane) and the mediolateral curvature (in the frontal plane) in the alignment

of the occluding surfaces and incisal edges of artificial teeth that are

used to develop balanced occlusion.

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10
Q

Parafunctional contacts:

A

Abnormal contacts; typically result from habits

such as bruxism and include area-to-area contacts

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11
Q

Protrusive contacts:

A

Contacts made when the mandible has moved anteriorly

from centric occlusion (protrusive movement). These are usually

edge-to-edge contacts for anterior teeth.

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12
Q

Working side contacts (laterotrusive contacts):

A

Contacts on the side toward

which the mandible has moved from centric occlusion (working side movement).

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13
Q

Nonworking side contacts (mediotrusive contacts):

A

Contacts on the side

away from which the mandible has moved from centric occlusion (nonworking

side movement).

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14
Q

Overbite:

A

The vertical overlapping of the mandibular incisors by the maxillary

incisors when the jaws are in centric occlusion. (

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15
Q

Overjet:

A

The horizontal overlapping of the mandibular incisors by the

maxillary incisors when the jaws are in centric occlusion.

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16
Q

Open bite:

A

A condition in which opposing teeth do not occlude.

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17
Q

Cross-bite:

A

An abnormal relation of one or more teeth in one arch to its

antagonist in the other arch due to a deviation of tooth or jaw position

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18
Q

Anterior cross-bite:

A

One or more maxillary incisors are positioned lingually

to the mandibular incisors when in centric occlusion

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19
Q

Posterior cross-bite:

A

One or more maxillary posterior teeth are positioned

palatally to the mandibular posterior teeth when in centric occlusion.

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20
Q

FOUR DETERMINANTS OF OCCLUSION

A

The teeth and their occlusal surfaces.

  1. The right TMJ.
  2. The left TMJ.
  3. The neuromusculature of the jaws and TMJs.
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21
Q

https://drive.google.com/open?id=0B8uJUY-tie8GNHljQ1gzbl9zTEU

A

https://drive.google.com/open?id=0B8uJUY-tie8GcVVvWHdTTFBlY0U

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22
Q

https://drive.google.com/open?id=0B8uJUY-tie8Gei16clctRXZPc0U

A

https://drive.google.com/open?id=0B8uJUY-tie8GbWl1b3Ewb3RINjg

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23
Q

Supporting (lingual) cusps of maxillary posterior teeth occlude with the

A

distal marginal ridge of their mandibular counterpart + the mesial marginal ridge

of tooth distal

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24
Q

ML cusp of molars, which occlude in the central fossa of their counterpart.â– 

AND

A

Supporting (buccal) cusps of mandibular posterior teeth occlude with the

mesial marginal ridge of their maxillary counterpart + the distal marginal

ridge of the tooth mesial

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25
Q

DB cusp of molars, which occlude in the —- —- of their counterpart

A

DB cusp of molars, which occlude in the central fossa of their counterpart

26
Q

D cusp of M1, which occludes in the ——– ——- of max M1.

■ ———cusps of maxillary posterior teeth oppose the —– embrasures of their ——- counterpart + the tooth distal

A

D cusp of M1, which occludes in the triangular fossa of max M1.

â–  Nonworking (buccal) cusps of maxillary posterior teeth oppose the buccal

embrasures of their mandibular counterpart + the tooth distal

27
Q

MB cusp of molars, which oppose the —– groove of their counterpart,

A

MB cusp of molars, which oppose the buccal groove of their counterpart,

28
Q

DB cusp + oblique ridge of M1, which oppose the – groove of mand

M1.

A

DB cusp + oblique ridge of M1, which oppose the DB groove of mand

M1.

29
Q

——– cusps of mandibular posterior teeth oppose the ——

embrasures of the —— counterpart + the tooth mesial,

A

Nonworking (lingual) cusps of mandibular posterior teeth oppose the lingual

embrasures of the maxillary counterpart + the tooth mesial,

30
Q

—- cusp of molars, which oppose the lingual groove of their counterpart

A

DL cusp of molars, which oppose the lingual groove of their counterpart

31
Q

L cusp of PM1, which opposes —–

A

L cusp of PM1, which opposes nothing.

32
Q

CR:

A

Most stable and reproducible position

33
Q

Rotation

â–  Translation

A

2 movements od mandible

34
Q

Frontal

â–  Sagittal

â–  Horizontal

A

Three directions of movement:

35
Q

Degree of movement

  1. Clinical significance of movements
A

other 2 factors of mand. movement

36
Q

Centric occlusion (CO):

A

Centric occlusion (CO): The maximum intercuspation of the opposing

arches. It is a purely tooth-guided position. This creates the vertical dimension

of occlusion (VDO).

37
Q

Centric relation (CR):

A

Centric relation (CR): The most anterior and superior position of the

mandibular condyles within the glenoid fossae (terminal hinge position).

By maintaining this position, only rotational movements around a horizontal

(hinge) axis can occur. It is a purely ligament-guided position.

38
Q

Rest (postural) position (RP):

A

Rest (postural) position (RP): The position of the mandible when it is in

a physiologic rest position. There are no tooth contacts in this position; it

is a purely muscle-guided position. This creates the vertical dimension of

rest (VDR). The resulting space between the teeth in this position (about

1–3 mm) is called the freeway space (FS)

39
Q

Maximum opening (MO):

A

Maximum opening (MO): The maximum separation of the opposing

arches. Creates the greatest amount of space between the teeth (about

40–50 mm).

40
Q

Protrusive movement:

A

Protrusive movement: The anterior movement of the mandible. As the

mandible moves anteriorly, the posterior teeth disarticulate. This is known

as anterior guidance

41
Q

The maximum posterior disarticulation occurs

when the anterior teeth are —– —–

A

The maximum posterior disarticulation occurs

when the anterior teeth are edge-to-edge

42
Q

Anterior guidance depends

largely on the —– and —-relationship of the maxillary and

mandibular incisors and canines.

A

Anterior guidance depends

largely on the horizontal and vertical relationship of the maxillary and

mandibular incisors and canines.

43
Q

Cusp length varies on the extent of this

relationship.

A

ant guidance

44
Q

Lateral movement:

A

Lateral movement: The lateral movement of the mandible. The side toward

which the mandible moves is the working side; the side away from which

the mandible moves is the nonworking side

45
Q

Canine guidance:

A

Canine guidance: The contact between the opposing canines on the

working side disarticulates all posterior teeth. Any premature contacts

on the working or nonworking sides are working and nonworking interferences,

respectively.

46
Q

Group function:

A

Group function: The contact between the opposing canines and posterior

teeth on the working side disarticulates the posterior teeth on the

nonworking side. Any contacts on the nonworking side are nonworking

interferences.

47
Q

https://drive.google.com/open?id=0B8uJUY-tie8GZENUbF9oZTRKcGc

A

https://drive.google.com/open?id=0B8uJUY-tie8GYWtobjFBc2FUQnM

48
Q

Occlusal interference:

A

Occlusal interference: Any contact that inhibits the remaining occlusal

surfaces from achieving harmonious contacts.

49
Q

Protrusive interference:

A

Protrusive interference: Premature contact between the mesial aspects of

mandibular posterior teeth and the distal aspects of maxillary posterior teeth.

50
Q

Working interference:

A

Working interference: Premature contact on the working side during lateral

mandibular movement

51
Q

Nonworking interference:

A

Premature contact on the nonworking side

during lateral mandibular movement

52
Q

https://drive.google.com/open?id=0B8uJUY-tie8GWWlxZUc2cVVReDQ

A

https://drive.google.com/open?id=0B8uJUY-tie8GVzl3UXJmdVBqNm8

53
Q

Protrusive movement:

A

Protrusive movement: Both right and left condyles rotate and translate

anteriorly simultaneously (downward along the articular eminence).

54
Q

Right working movement:

A

Right working movement: The left condyle rotates and translates anteriorly

(downward along the articular eminence) and medially (to the right). The

right condyle rotates forward and translates slightly laterally (to the right).

55
Q

Left working movement:

A

Left working movement: The right condyle rotates and translates anteriorly

(downward along the articular eminence) and medially (to the left).

The left condyle rotates forward and translates slightly laterally (to the left).

56
Q

https://drive.google.com/open?id=0B8uJUY-tie8GaGUteVFDS0thR0U

A

https://drive.google.com/open?id=0B8uJUY-tie8GZUpnQm9PbVhMV1E

57
Q

https://drive.google.com/open?id=0B8uJUY-tie8GcDVjSWVacUJubzg

A

https://drive.google.com/open?id=0B8uJUY-tie8GdTh3OWY3TXJSOE0

58
Q

https://drive.google.com/open?id=0B8uJUY-tie8GXzJoS0dVUjBxRDA

A

https://drive.google.com/open?id=0B8uJUY-tie8GaDU4bmwwcUsxNHc

59
Q

https://drive.google.com/open?id=0B8uJUY-tie8GTGVkSmp5WE1nZ2s

A

https://drive.google.com/open?id=0B8uJUY-tie8GY1plRTRwajJ6WVE

60
Q

https://drive.google.com/open?id=0B8uJUY-tie8GTFdnMnRfNzNucW8

A

https://drive.google.com/open?id=0B8uJUY-tie8GdHNHTEc1VnhIOUE

61
Q

https://drive.google.com/open?id=0B8uJUY-tie8GX01ydlhuNG5Ubmc

A

https://drive.google.com/open?id=0B8uJUY-tie8GT1dvLVVRcWs0dzQ

NBDE dental anatomy (5 decks)

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