High Yield - Ortho/Peds

Question 1

What is the most common malocclusion?

Answer 1

Class I

followed by Class II, Class III

Question 2

Which types of tissues can be used to help time the growth spurt?

Answer 2

Reproductive tissues

Question 3

After fusion of a cleft palate, which area is most likely to remain open?

Answer 3

Posterior

Question 4

Describe the different ANB angles and what they mean?

Answer 4

Normal = 2 (+/-2)
Class II = >4
Class III = <0

Question 5

What is a normal SNA and SNB?

Answer 5

SNA = 82
SNB = 80

Question 6

T/F: Extrusion of posterior teeth would be best to correct deep bite in patient with long face height.

Answer 6

False

Intrusion of max incisors

Question 7

Formation of a hyalinized zone is caused by ______.

Answer 7

heavy tooth movement forces

Question 8

T/F: Putting a force through the center of rotation would cause translation of the tooth.

Answer 8

False

Center of resistance

Question 9

T/F: Doubling the force would then double the moment (tendency to rotate, tip, torque)

Answer 9

True

Question 10

A wire causing intrusion of maxillary incisors would cause what movement on maxillary molars?

Answer 10

Extrude and tip distally

Question 11

What are the two phases of NiTi wires?

Answer 11

Austenitic and martensitic. Reversible transformation between these two phases give NiTi wires their flexibility.

Question 12

What are 1st, 2nd, and 3rd order bends?

Answer 12

1st - bucco-lingual positioning or rotation in occlusal plant
2nd - mesio-distal tipping
3rd - bucco-lingual tipping

Question 13

Extraction of maxillary 1st premolars, intrusion arches, and full fixed appliances is an example of what orthodontic therapy?

Answer 13

Class II camouflage

Question 14

T/F: Cervical pull headgear will cause the maxillary molar to tip/move distally and intrude.

Answer 14

False

Move/tip distally and extrude. Use with deep bite

Question 15

What is the order of serial extractions?

Answer 15

Primary canines, primary 1st molars, permanent 1st premolars

Question 16

What is the most difficult surgical movement?

Answer 16

Inferior positioning of maxilla

Question 17

T/F: Nerve blocks should be used for pulp therapy, extractions on primary 2nd molars.

Answer 17

True

Question 18

Where is the mandibular foramen located on a child?

Answer 18

Lower than the occlusal plane

Question 19

What is the minimum alveolar concentration (MAC) of nitrous oxide?

Answer 19

105

Question 20

What is the fluoride rule of 6s?

Answer 20

No supplemental systemic fluoride needed if any of the following:

1. If greater than .6ppm in water
2. If younger than 6 months
3. If older than 16 years

Question 21

What tooth location and population is most likely to suffer from localized aggressive perio in primary teeth?

Answer 21

Primary molars; black children

Question 22

In what order should the following be placed: Ortho treatment, caries control, Perio treatment, crown cementation.

Answer 22

1. Caries control
2. Ortho
3. Perio
4. Crown

Question 23

Most bones of craniofacial complex form by __________ ossification.

Answer 23

intramembranous;

*exceptions are cranial base (occipital, ethmoid, sphenoid)

Question 24

Small or absent pulp chambers along with easilly chipped enamel in both primary and permanent teeth are all characteristics of _________.

Answer 24

dentinogenesis imperfecta

Question 25

What is the proper order for tooth formation?

Answer 25

1. Initiation
2. Proliferation
3. Histodifferentiation
4. Apposition
5. Calcification