Occlusion

Question 1

Functional Occlusion

Answer 1

Occurs during mastication and swallowing

Question 2

Static Occlusion

Answer 2

Jaws are closed - centric occlusion

Question 3

Mandibular Movements: depression

Answer 3

Open

Question 4

Mandibular Movements: elevation

Answer 4

Closed

Question 5

Mandibular Movements: protrusion

Answer 5

Forward

Guided by incisors

Question 6

Mandibular Movements: retrusion

Answer 6

Backward

Question 7

Mandibular Movements: lateral

Answer 7

Left-Right
Guided by canines
One side working, other side balancing

Question 8

Centric Occlusion

Answer 8

“Habitual occlusion”
“Natural bite”
Usual or routine, maximum contacts

Question 9

Centric Relation

Answer 9

Relationship of max/mand when condyle is rearmost in glenoid fossa - TMJ

Question 10

Overjet

Answer 10

Max teeth overlap mand HORIZONTAL

1-3mm is normal

Question 11

Overbite

Answer 11

Max teeth overlap mand VERTICAL
Incisal/middle/cervical
Normal/slight/severe

Question 12

Intercuspation

Answer 12

Lingual cusps of max occluding w mand

Question 13

Interdigitation

Answer 13

“antagonists”

Question 14

Mesognathic

Answer 14

Even facial profile where max teeth slightly overlap mand

Question 15

Molar Relation: normal

Answer 15

First molars - mand MB groove aligns w max MB cusp

Question 16

Canine Relationship: normal

Answer 16

max occludes w distal half of mand + mesial half of 1st mand premolar

Question 17

Retrognathic

Answer 17

Maxilla protrudes

Mandible appears weak/retruded

Question 18

Molar Relationship: Class II

Answer 18

MB groove is distal to MB cusp by a premolar

Question 19

Canine Relationship: Class II

Answer 19

Distal of mand is distal to the mesial surface of max by a premolar

Question 20

Class II, Division 1

Answer 20

Maxillary incisors protruded (overjet/overbite)

Question 21

Class II, Division 2

Answer 21

Max incisors retruded

Tilted toward mand incisors

Question 22

Prognathic

Answer 22

Prominent lower lip/mandible protruded

Question 23

Molar Relationship: Class III

Answer 23

MB groove mesial to MB cusp by a premolar

Question 24

Canine Relationship: Class III

Answer 24

Distal of mand is mesial to mesial of max by a premolar

Question 25

Labioversion

Answer 25

individual teeth positioned labial to normal (anterior)

Question 26

Linguoversion

Answer 26

individual teeth positioned lingual to normal

Question 27

Buccoversion

Answer 27

individual teeth positioned buccal to normal (posterior)

Question 28

Surpaversion

Answer 28

individual teeth elevated above line of occlusion

Question 29

Torsoversion

Answer 29

individual teeth rotated/turned

Question 30

Infraversion

Answer 30

individual teeth depressed below line of occlusion

Question 31

Crossbite

Answer 31

Quadrant of teeth that are facial or lingual to normal position

Question 32

Edge to Edge

Answer 32

Anterior incisor edges occlude instead of overlap

Question 33

End to end

Answer 33

Posterior cusps occlude

Question 34

Curve of Spee

Answer 34

Anterior - posterior curve

Question 35

Curve of Wilson

Answer 35

Mesial - lateral curve

Question 36

Lateral Occlusion

Answer 36

Guided by canines | Canines should be only teeth occluding “canine rise”

Question 37

Protrusive Occlusion

Answer 37

Guided by incisors | All 8 anteriors in contact

Question 38

Functional Contacts

Answer 38

Normal contact during chewing/swallowing, momentary

Question 39

Parafunctional Contacts

Answer 39

Tooth contact that directs the mandible away from CO | Outside range of normal function

Question 40

Parafunctional habits

Answer 40

``` Clenching Bruxism Tongue thrusting Sucking Lip incompetence Mouth breathing ```

Question 41

Premature occlusion

Answer 41

Tooth that contacts first as jaw closes in CO Contacts when should be disengaged —> leads to traumatic occlusion

Question 42

Traumatic Occlusion

Answer 42

``` Tooth mobility Sensitivity Migration Wear facets Open contacts ```

Question 43

Primary Occlusion: canines

Answer 43

Same as permanent

Question 44

Primary Occlusion: molars

Answer 44

Terminal plane relationships: | Mesial step or flush terminal plane

Question 45

Mesial Step

Answer 45

PRIMARY mand. 2nd molar is mesial to the maxillary 2nd molar

Question 46

Flush Terminal Plane

Answer 46

PRIMARY max and mandibular 2nd molars are end-to-end

Question 47

Distal Step

Answer 47

PRIMARY mand 2nd molar is distal to maxillary 2nd molar | Not ideal