Occlusion Lecture 2 Flashcards Preview

Occlusion > Occlusion Lecture 2 > Flashcards

Flashcards in Occlusion Lecture 2 Deck (49):
1

What is the compensating curve?

the combination of the curve of Wilson and curve of Spee.

2

Where does the distobuccal cusp of the mandibular molars occlude?

in the central fossa of the maxillary molars

3

Where does the mesolingual cusp of maxillary molars occlude?

in the central fossa of mandibular molars

4

Which mandibular molar cusp occludes in the maxillary molar central fossa?

distobuccal cusp of mandibular molars

5

Which maxillary molar cusp occludes in the mandibular molar central fossa?

mesiolingual cusp of maxillary molars

6

Which direction in the maxilla does the occlusion shift in Class II occlusion?

occlusion shifts posteriorly in the maxilla

-maxillary mesiolingual molar cusp no longer occludes in mandibular molar central fossa

7

Which direction in the maxilla does occlusion shift in Class III occlusion?

occlusion shifts anteriorly in the maxilla

-maxillary mesiolingual molar cusp no longer occludes in mandibular molar central fossa

8

What forms the occlusal table?

inner inclines of both cusps on the buccal and lingual sides

-outside cusp tip forms the outer incline and is not part of the occlusal table

9

What does the inner incline of cusps on the posterior teeth form

the occlusal table

10

What percent is the buccolingual width of a tooth is the occlusal table?

50-60%

11

What are supporting cusps for both arches?

Maxillary supporting cusps: lingual cusps

Mandibular supporting cusps: buccal cusps

- cusps that occlude with the opposing tooth
- opposite of guiding cusps

12

What are the maxillary supporting cusps?

lingual cusps

13

What are the mandibular supporting cusps?

buccal cusps

14

What are the guiding cusps for both arches?

Maxillary guiding cusps: buccal cusps

Mandibular supporting cusps: lingual cusps

-cusps that don't occlude in the with the opposing tooth, "hang off"
- opposite of supporting cusps

15

What are the maxillary guiding cusps?

buccal cusps

16

What are the mandibular guiding cusps?

lingual cusps

17

Where do supporting cusps occlude?

Supporting cusps occlude in maximal intercuspal occlusion

18

Which dimension does the supporting cusps hold?

supporting cusps hold the vertical dimension

19

What movement does the outer outline of supporting cusps occlude in?

supporting cusps occlude in a horizontal movement

20

Where does the outer outline of guiding cusps occlude?

they don't occlude

21

What is the general shape of supporting cusps compared to guiding cusps?

supporting cusps are ore rounded than guiding cusps

22

What is the supporting cusps contact surface?

1 mm

23

Shape of maxillary central incisors from the facial and proximal view.

facial: trapezoid
proximal: triangular

24

Shape of maxillary second premolars from the facial and proximal view.

facial: trapezoid but also pentagon...
proximal: trapezoid

25

Shape of mandibular first molar from the anterior and proximal view.

anterior: trapezoid
proximal: rhomboidal

26

Height of contour for the anterior teeth.

gingival 1/3 for facial and lingual

27

Height of contour for the mandibular posterior teeth.

facial: gingival 1/3
lingual: occlusal 1/3

28

Height of contour for the maxillary posterior teeth.

facial and lingual: middle 1/3

29

What does correct, over, and under contouring look like for heigh of contour?

Correct: follows the gingiva
Over: overhang over the gingiva
Under: contour runs into the gingiva

30

What is the cervical line form?

The line around the neck of a tooth, where the cementum and enamel meet.

- curvature becomes more flat as you move mesial to distal.

31

What are the interproximal contact heights or the pattern that they follow?

Proximal contact points move from incisal to gingival 1/3 in a mesial - distal direction

- proximal points can be more buccal or lingual -
contact points influence points of embrasure

32

What do the axial positions show?

difference in projection of the roots and crowns of teeth

33

In the maxillary arch which tooth has the biggest angulation?

3rd molars. If the 3rd molar is removed then it's the central incisor.

34

Most parallel teeth in the maxillary arch?

bicuspids

35

Most perpendicular teeth in the maxillary arch?

2nd molar

36

Which root of which maxillary tooth is is NOT inclined towards the palate?

distobuccal root of the 1st molar

- inclined to the cheek side

37

What is the axial inclination of the maxillary central incisor?

28 degrees facial-lingual
2 degrees off axis mesial-distal

38

What is the axial inclination of the maxillary lateral incisor?

26 degrees facial-lingual
7 degrees off axis mesial-distal

39

What is the axial inclination of the maxillary canine?

16 degrees facial-lingual
17 degrees off axis mesial-distal

40

Which mandibular tooth has the strongest angulation?

the 3rd molar

41

which mandibular tooth is the most perpendicular?

2nd molar

42

T/F: the mandibular central incisors have less inclination than the maxillary central incisors.

True.

43

T/F: ALL mandibular molar roots have stronger inclinations than the maxillary

True.

44

horizontal-vertical overlap

the overlap of teeth that can be used to describe overbite if excessive.

- incisal guidance depends on this overlap
- can clinically see the amount of overlap

45

LO, BO, CF line

The three occlusal alignment lines of the mouth.

Lingual Occlusal line (line of occluding cusps) in maxillary teeth.

Buccal Occlusal line (line of occluding cusps) in mandibular teeth.

Central Fossa line in both arches.

46

How do the LO, BO, and CF lines occlude?

LO occludes with the CF line of the mandibular arch.

BO occludes with the CF line of the maxillary arch

LO = Lingual Occlusal line
BO = Buccal Occlusal line
CF = Central Fossa line

47

Know the occlusion points for all teeth. Slide 44 lecture 2

Know the occlusion points for all teeth. Slide 44 lecture 2

48

Know how the teeth are aligned and the teeth alignment behind the maxillary central incisors. Slide 45 lecture 2

Know how the teeth are aligned and the teeth alignment behind the maxillary central incisors. Slide 45 lecture 2

49

T/F: Can one aberrant tooth contour or contact lead to tooth or supporting tissue damage?

True.