Brainscape's Knowledge GenomeTM

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


See full index

NBDE Part 1 > Oral Anatomy: Function/Occlusion > Flashcards

Oral Anatomy: Function/Occlusion Flashcards

1
Q

T/F: A compensating curve is used to create balanced occlusion for artificial teeth.

A

True

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

Describe a working side (laterotrusive) movement.

A

The side of the mouth that the mandible moves to

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

Descibe a nonworking side (mediotrusive) contact.

A

Contacts on the side away from which the mandible has moved

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

_________ is the vertical overlapping of mandibular incisors by maxillary incisors.

A

Overbite

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

_________ is the horizontal overlapping of mandibular incisors by maxillary incisors.

A

Overjet

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

T/F: Angle’s classification is based on molars only.

A

False

Molars and canines

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

What is the molar relationship that defines Class I occlusion?

A

MB cusp of max M1 occludes with MB groove of mand M1

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

Where is the max canine occluding in a Class I relationship?

A

Max canine occludes between mand canine and PM1

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

What is the difference between Division I and Division II Class II occlusion?

A

Division I - all max incisors proclined

Division II - max centrals retroclined, laterals proclined

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

In Class II occlusion, the MB cusp of max M1 occludes _________ to the MB groove of mand M1.

A

mesially

canine also occludes more mesially

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

In class III occlsuion, the MB cusp of M1 occludes _______ to the MB groove of mand M1.

A

distally

canine also occludes more distally

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

What are the working cusps of maxillary and mandibular teeth?

A

Max lingual and mand buccal

functional cusps

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

What do working cusps oppose?

A

central fossae and marginal ridges

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

T/F: Working cusps are sharper than nonworking cusps.

A

False

Broader and rounder

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

T/F: Nonworking cusps support the vertical dimension of the face.

A

False

Working cusps

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

What do nonworking cusps oppose?

A

Embrasure spaces and grooves

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

In ideal CO, every tooth in one arch contacts two teeth in the opposite arch except for which teeth?

A

Max 3rd molars and mand central incisors

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

Where do the ML cusps of max molars teeth occlude?

A

In the central fossa of their counterpart

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

Where do the DL cusps of max molars and the lingual cusps of max premolars occlude?

A

Distal marginal ridge of counterpart and mesial marginal ridge of distal tooth

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

The mandible acts as a _______ lever.

A

class III

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

Although there are a couple exceptions, where do most buccal cusps of mandibular posterior teeth occlude?

A

Mesial marginal ridge of maxillary counterpart and distal marginal ridge of mesial tooth

22
Q

Which cusp of mand molars occludes in the central fossa of their counterparts?

A

DB cusps

23
Q

Where does the distal cusp of mand M1 occlude?

A

Triangular fossa of max M1

24
Q

Where does the MB cusp of max molars occlude?

A

Buccal groove of counterpart

25
Q

Where does the DB cusp and oblique ridge of the max M1 occlude?

A

DB groove of mand M1

Because of the distal cusp of mand M1

26
Q

Where do the DL cusps of mand molars occlude?

A

Lingual groove of counterpart

27
Q

Which nonworking cusp in the mandible opposes nothing?

A

L cusp of PM1

28
Q

_________ is the most anterior and superior position of the condyles.

A

Centric relation

29
Q

What is the terminal hinge position?

A

Position of the condyles in CR

30
Q

______ is a tooth-guided position. ______ is a ligament-guided position.

A

CO; CR

31
Q

T/F: During swallowing, the mandible meets the maxilla in centric occlusion.

A

True

32
Q

Posselt’s envelope of motion illustrates the mandible’s motion in which planes?

A

Sagittal, horizontal, frontal

33
Q

T/F: The side that the mandible moves to is the working side.

A

True

34
Q

The ____________ occurs during lateral excursive movements in which the working side condyle shifts laterally.

A

Bennett movement

35
Q

Protrusive movements are caused by contraction of _______________.

A

Both lateral pterygoids

36
Q

What muscle causes a lateral excursive movement?

A

Contraction of the lateral pterygoid on the non working side

37
Q

In which directions does the non working condyle move during a lateral excursive?

A

Anteriorly and medially

38
Q

Which muscles of mastication work for retrusion of the mandible? Protrusion?

A

Retrusion - temporalis and masseter

Protrusion - Medial and lateral pterygoid

39
Q

Which is the only MoM that depresses the mandible?

A

Lateral Pterygoid

40
Q

All MoM are innervated by ______.

A

V3

41
Q

Which are the 5 suprahyoid muscles and how are they innervated?

A
  1. Anterior digastric - V3
  2. Posterior digastric - VII
  3. Mylohyoid - V3
  4. Geniohyoid - C1 via XII
  5. Stylohyoid - VII
42
Q

T/F: Both the suprahyoid and infrahyoid muscles assist in depression of the mandible.

A

True

43
Q

The ___________ elevate the hyoid, especially during swallowing.

A

suprahyoid

44
Q

_____________ muscles depress the hyoid and larynx, especially after swallowing.

A

Infrahyoid

45
Q

What are the four infrahyoid muscles and their innervation?

A
  1. Omohyoid - ansa cervicalis
  2. Sternohyoid - a.c.
  3. Sternothyroid - a.c.
  4. Thyrohyoid - C1 via XII
46
Q

Which infrahyoid muscle is not innervated by the ansa cervicalis?

A

Thyrohyoid

47
Q

T/F: If the hypoglossal nerve is injured, the tongue will deviate towards the side of the injury.

A

True

48
Q

What are the four extrinsic muscles of the tongue?

A

Genioglossus - protrusion
Hyoglossus - depression
Styloglossus - elevation, retrusion
Palatoglossus - elevation

49
Q

Which is the only tongue muscle not innervated by CN XII?

A

Palatoglossus - CN X (pharyngeal plexus)

50
Q

Which ligament prevents posterior and inferior displacement of the condyles and provides direct support to the TMJ capsule?

A

Temporomandibular (lateral) ligament

NBDE Part 1 (31 decks)

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