Occlusion Lecture 2

Question 1

What is the compensating curve?

Answer 1

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

Question 2

Where does the distobuccal cusp of the mandibular molars occlude?

Answer 2

in the central fossa of the maxillary molars

Question 3

Where does the mesolingual cusp of maxillary molars occlude?

Answer 3

in the central fossa of mandibular molars

Question 4

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

Answer 4

distobuccal cusp of mandibular molars

Question 5

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

Answer 5

mesiolingual cusp of maxillary molars

Question 6

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

Answer 6

occlusion shifts posteriorly in the maxilla

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

Question 7

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

Answer 7

occlusion shifts anteriorly in the maxilla

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

Question 8

What forms the occlusal table?

Answer 8

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

Question 9

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

Answer 9

the occlusal table

Question 10

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

Answer 10

50-60%

Question 11

What are supporting cusps for both arches?

Answer 11

Maxillary supporting cusps: lingual cusps

Mandibular supporting cusps: buccal cusps

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

Question 12

What are the maxillary supporting cusps?

Answer 12

lingual cusps

Question 13

What are the mandibular supporting cusps?

Answer 13

buccal cusps

Question 14

What are the guiding cusps for both arches?

Answer 14

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

Question 15

What are the maxillary guiding cusps?

Answer 15

buccal cusps

Question 16

What are the mandibular guiding cusps?

Answer 16

lingual cusps

Question 17

Where do supporting cusps occlude?

Answer 17

Supporting cusps occlude in maximal intercuspal occlusion

Question 18

Which dimension does the supporting cusps hold?

Answer 18

supporting cusps hold the vertical dimension

Question 19

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

Answer 19

supporting cusps occlude in a horizontal movement

Question 20

Where does the outer outline of guiding cusps occlude?

Answer 20

they don’t occlude

Question 21

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

Answer 21

supporting cusps are ore rounded than guiding cusps

Question 22

What is the supporting cusps contact surface?

Answer 22

1 mm

Question 23

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

Answer 23

facial: trapezoid
proximal: triangular

Question 24

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

Answer 24

facial: trapezoid but also pentagon…
proximal: trapezoid

Question 25

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

Answer 25

anterior: trapezoid proximal: rhomboidal

Question 26

Height of contour for the anterior teeth.

Answer 26

gingival 1/3 for facial and lingual

Question 27

Height of contour for the mandibular posterior teeth.

Answer 27

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

Question 28

Height of contour for the maxillary posterior teeth.

Answer 28

facial and lingual: middle 1/3

Question 29

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

Answer 29

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

Question 30

What is the cervical line form?

Answer 30

The line around the neck of a tooth, where the cementum and enamel meet. - curvature becomes more flat as you move mesial to distal.

Question 31

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

Answer 31

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

Question 32

What do the axial positions show?

Answer 32

difference in projection of the roots and crowns of teeth

Question 33

In the maxillary arch which tooth has the biggest angulation?

Answer 33

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

Question 34

Most parallel teeth in the maxillary arch?

Answer 34

bicuspids

Question 35

Most perpendicular teeth in the maxillary arch?

Answer 35

2nd molar

Question 36

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

Answer 36

distobuccal root of the 1st molar - inclined to the cheek side

Question 37

What is the axial inclination of the maxillary central incisor?

Answer 37

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

Question 38

What is the axial inclination of the maxillary lateral incisor?

Answer 38

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

Question 39

What is the axial inclination of the maxillary canine?

Answer 39

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

Question 40

Which mandibular tooth has the strongest angulation?

Answer 40

the 3rd molar

Question 41

which mandibular tooth is the most perpendicular?

Answer 41

2nd molar

Question 42

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

Answer 42

True.

Question 43

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

Answer 43

True.

Question 44

horizontal-vertical overlap

Answer 44

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

Question 45

LO, BO, CF line

Answer 45

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.

Question 46

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

Answer 46

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 ```

Question 47

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

Answer 47

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

Question 48

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

Answer 48

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

Question 49

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

Answer 49

True.