Orthodontics Final

Question 1

Class II: The upper MB cusp is ____ to the buccal groove of the mandibular first molar

Answer 1

Mesial to

Question 2

T/F: Interceptive care is best started as soon as the first permanent tooth erupts

Answer 2

True

Question 3

T/F: Rotated anterior teeth take up less space than when aligned properly

Answer 3

True

Question 4

T/F: Rotated posterior teeth take up less space than when properly aligned

Answer 4

False

Question 5

Mesenchymal cells differentiate into:

Answer 5

-osteoblasts
-cementoclasts
-fibroblasts

(all of the above)

Question 6

What is the function of the principle fibers in the PDL:

Answer 6

-Absorb heavy forces
-Attach tooth to alveolar bone

Question 7

Bone apposition occurs on the:

Answer 7

tension side

Question 8

Hyalinization is defined as:

Answer 8

Bone resorption that is indirect & undermining

Question 9

T/F: The most prevalent etiologic factor for malocclusion is environmental

Answer 9

False

Question 10

T/F: Angles classification is classified in the transverse plane

Answer 10

False

Question 11

Class II malocclusions are caused by:

Answer 11

Mandibular retrognathism

Question 12

The highest prevalence of Class III malocclusions are present in:

Answer 12

Southeast asia

Question 13

Patient has a transverse posterior lingual cross bite, what is the most common reason for it:

Answer 13

Underdeveloped maxilla

Question 14

What correlated to a deep bite:

Answer 14

-skeletal
-dental
-something else
-all of the above

Question 15

What is the most common problem presented with a maxillary lateral incisor:

Answer 15

peg shaped

Question 16

What is is ectodermal dysplasia presented with?

Answer 16

Oligodontia and abnormally shaped teeth

Question 17

T/F: Early exfoliation of a primary molar causes an arch length discrepency

Answer 17

True

Question 18

What is the bolten ratio for anterior teeth?

Answer 18

77%

Question 19

T/F: For severe crowding, the lateral incisor will contact the mesial aspect of the deciduous molar

Answer 19

True

Question 20

T/F: you need radiographs for moyers

Answer 20

False

Question 21

Where are primate spaces located?

Answer 21

Mesial to upper primary cuspid & distal to lower primary cuspid

Question 22

Class III occlusion may also be called:

Answer 22

Mesiocclusion

Question 23

Which is not a prerequisite for serial extraction?

Answer 23

Deep bite

Question 24

Which of the following is NOT a benefit of serial extraction?

Answer 24

Lingualization of the incisors

Question 25

T/F: The alveolar bone height effects the location of the center of resistance

Answer 25

True

Question 26

Force applied in the middle of the center of resistance results in:

Answer 26

pure translation

Question 27

The patient had a reduced horizontal bone, if you apply a force on the crown, what would occur?

Answer 27

More tipping

Question 28

Force coupling results in:

Answer 28

Pure rotation

Question 29

T/F: Interdisciplinary care is different from multidisciplinary care:

Answer 29

True

Question 30

T/F: Generally primary posterior teeth are larger than their successor:

Answer 30

True

Question 31

T/F: The 6 keys of normal occlusion were studied on radiographs

Answer 31

False

Question 32

T/F: Orthodontics is primarily focused on esthetics

Answer 32

True

Question 33

T/F: Premolars are present in the early mixed dentition:

Answer 33

Flase

Question 34

T/F: If you extract a tooth that has a root that is 2/3 developed it will slow the eruption

Answer 34

False