Ortho Principles & Techniques

Question 1

What three types of problems can come from maloccluded teeth?

Answer 1

Psychosocial, function, oral health

Question 2

How are people with maloccluded teeth generally affect psychosocially?

Answer 2

they’re seen as inferior, unintelligent, maybe aggressive, etc

Question 3

What is handicapping malocclusion?

Answer 3

malocclusion that affect the person’s psychosocial life, their development, speech, and overall quality of life

Question 4

Patients with “less severe” are more or less likely to experience anxiety and emotional problems compared to grossly disfigured patients?

Answer 4

more likely because of unpredictable responses from others

Question 5

What is the main reason people seek orthodontic treatment?

Answer 5

to help with psychosocial problems

Question 6

What is considered physiologic occlusion?

Answer 6

Class 1 occlusion

Question 7

TMD is more often caused by what?

Answer 7

muscle fatigue and spasm, which can be initiated by malocclusion

Question 8

What indication can we use to determine if orthodontic tx might help with TMD?

Answer 8

splint therapy - if the patient responds well

Question 9

Which class of occlusion is most likely to experience trauma to maxillary incisors?

Answer 9

Class II (protruded)

Question 10

What long-term effect can an extreme overbite elicit?

Answer 10

Lower incisors will contact gingiva and possibly cause bone loss and early loss of maxillary incisors

Question 11

Which permanent teeth erupt at 6 years old?

Answer 11

All first molars and md centrals

Question 12

Dental age 8 is characterized by eruption of which teeth?

Answer 12

mx laterals

Question 13

Dental age 11 is characterized by which teeth erupting?

Answer 13

md canines, and all first premolars

Question 14

What dental age is best to start orthodontic treatment?

Answer 14

age 11

Question 15

Dental age 12 is characterized by eruption of what teeth?

Answer 15

the remaining succedaneous teeth (2nd premolars, mx canine, 2nd molars)

Question 16

What characterized dental age 15?

Answer 16

All roots of erupted teeth are formed and crowns of 3rd molars are formed

Question 17

What are the two periods of post-emergent eruption?

Answer 17

Juvenile and adult post-emergent eruption

Question 18

What is necessary for eruption?

Answer 18

metabolic activity within the PDL

Question 19

What two mechanisms are necessary for eruption?

Answer 19

resorption of hard tissues, and propulsion of tooth

Question 20

Why don’t adult teeth erupt in people with cleidocranial dysplasia?

Answer 20

abnormal resorption of bone and primary teeth

Question 21

What is the rate limiting factor of eruption?

Answer 21

resorption of overlying bone and primary tooth structure

Question 22

How do dilacerations occur?

Answer 22

The tooth is mechanically blocked from erupting but the roots continue growing

Question 23

What is primary failure of eruption?

Answer 23

non-syndromic eruption failure and without mechanical obstruction

Question 24

Which teeth are more commonly affected by eruption disturbances?

Answer 24

posterior teeth

Question 25

Is primary failure of eruption symmetrical or asymmetrical?

Answer 25

asymmetrical

Question 26

Primary failure of eruption (PFE) is associated with what mutation?

Answer 26

PTH1R

Question 27

What is the juvenile post-emergent spurt?

Answer 27

The period from when the tooth breaks gingiva to the point it reaches the occlusal level

Question 28

Eruption is stopped by force for how long?

Answer 28

only 1-3 minutes

Question 29

What forces are probably more important in controlling eruption?

Answer 29

soft tissue forces

Question 30

Do teeth erupt more at night or in the day time?

Answer 30

At night, between 8pm and 1am

Question 31

What portion of the total eruption path is done after the tooth is in function?

Answer 31

half

Question 32

What can lateral tongue thrust cause?

Answer 32

posterior open bite

Question 33

What treatment options do we have for ankylosed permanent teeth?

Answer 33

extraction, crown, or surgery

Question 34

When is extraction of an ankylosed primary tooth indicated?

Answer 34

When it drops below the height of contour of adjacent teeth