Tooth Eruption

Question 1

How many months of variation is considered normal for tooth eruption timelines?

Answer 1

6 months, plus or minus

Question 2

delayed eruption frequently occurs in ________?

Answer 2

trisomy 21

• high perio risk
• low caries risk

Question 3

besides trisomy 21, what other 3 abnormalities sometimes cause delayed eruption?

Answer 3

1-hypothyroidism
2-congenital hypothyroidism
3-juvenile hypothyroidism

Question 4

in achondroplastic dwarfism, the maxilla is usually small or big?

Answer 4

small

*crowding

Question 5

besides a small maxilla, people with achondroplastic dwarfism have a tendency for what 3 dental related things?

Answer 5

1-open bite
2- chronic gingivitis
3- delayed eruption

Question 6

by the time a tooth has clinically emerged, how much root formation has occurred?

Answer 6

3/4

*root development has a mean difference of .54 years between genders

Question 7

eruption of premolars is delated when kids lose primary molars before what ages?

Answer 7

4 or 5

Question 8

T/F at age 8, 9, 10 premolar eruption is greatly accelerated because of premature primary molar loss

Answer 8

True

Question 9

review sequence of eruption in perm teeth

Answer 9

look on slides

Question 10

what are 4 common problems associated with eruption of perm teeth?

Answer 10

1-deficiency in arch length
2-overbite
3-need for space maintainers
4-delayed tooth eruption

Question 11

what are natal teeth?

Answer 11

teeth present at birth

Question 12

what are neonatal teeth?

Answer 12

teeth that erupt during first 30 days of life

Question 13

what is the prevalence of natal/neonatal teeth?

Answer 13

1 per 700-3700

Question 14

85% of natal/neonatal which teeth?

Answer 14

mandibular primary incisors

Question 15

what 2 things become a problem if a baby has neonatal teeth

Answer 15

1-nursing…OUCH!

2-lacerations on tongue

Question 16

what 2 options are available for neonatal teeth?

Answer 16

extract, do nothing

Question 17

where and what are Epstein pearls?

Answer 17

midpalatine raphe

**remnants of epithelial tissue

Question 18

where and what are Bohn nodules?

Answer 18

• formed along buccal and lingual aspects of dental ridges and palate
• remnants of salivary gland tissue

*different than Epstein pears

Question 19

Where and what are dental lamina cysts?

Answer 19

• found on crests of max and mand dental ridges

- remnants of dental lamina

Question 20

There are three types of inclusion cysts. What are their treatment?

Answer 20

do nothing. lesions with spontaneously shed a few weeks after birth

Question 21

T/F the eruption of primary teeth is preceded by increased salivation

Answer 21

True

Question 22

4 visual signs of primary teeth eruption

Answer 22

• restlessness
• drooling
• swelling
• loss of appetite

Question 23

what 5 things have been incorrectly attributed to teething?

Answer 23

1-croup
2-diarrhea
3-fever
4-convulsions
5-primary herpetic gingivostomatits

Question 24

what 2 things can treat teething?

Answer 24

1-teething rings

2-OTC antihistamines

Question 25

what is the 1st choice for space maintenance for ectopic eruption of 1st perm molars?

Answer 25

ortho elastic separators

*as long as access is sufficient to allow for engagement

Question 26

Besides ortho elastic separators to maintain space for ectopic eruption of perm 1st molars, what are 3 other options?

Answer 26

1-separating springs (enough eruption for insertion between contacts)
2-brass ligature wire (threat between contacts to distalize teeth, require tightening)
3-halterman appliance

Question 27

when should you remove the primary canine?

Answer 27

when the perm. canine is crossing another root (usually the lateral incisor) by 50%

Question 28

what teeth are most commonly ankylose?

Answer 28

primary molars

*never in anteriors unless there was trauma

Question 29

what are the 3 theories of ankylosis?

Answer 29

1-familial pattern (more common in blacks)
2-no perm successors
3-the resorption process isn’t continuous and a reparative process occurs

Question 30

where does resorption of the primary molars begin?

Answer 30

begins on inner/lingual surfaces

Question 31

if you have a cooperative patient who is good at 6month recalls, what is the best approach to dealing with ankylosed teeth?

Answer 31

watch and wait

Question 32

if an ankylosed tooth has no successor, with it exfoliate?

Answer 32

no

*some root resorption may occur

Question 33

people with cleidocranial dysplasia have _________ prognathism

Answer 33

mandibular

*caused by increased mand length and short cranial bases

Question 34

people with cleidocranial dysplasia tend to have maxillae that are ___________ vertically but not __________

Answer 34

short, anteroposteriorly

Question 35

besides missing clavicles and large fontanels, a disguising characteristic of cleidocranial dysplasia is ________

Answer 35

supernumerary teeth