Tooth Eruption Flashcards
How many months of variation is considered normal for tooth eruption timelines?
6 months, plus or minus
delayed eruption frequently occurs in ________?
trisomy 21
- high perio risk
- low caries risk
besides trisomy 21, what other 3 abnormalities sometimes cause delayed eruption?
1-hypothyroidism
2-congenital hypothyroidism
3-juvenile hypothyroidism
in achondroplastic dwarfism, the maxilla is usually small or big?
small
*crowding
besides a small maxilla, people with achondroplastic dwarfism have a tendency for what 3 dental related things?
1-open bite
2- chronic gingivitis
3- delayed eruption
by the time a tooth has clinically emerged, how much root formation has occurred?
3/4
*root development has a mean difference of .54 years between genders
eruption of premolars is delated when kids lose primary molars before what ages?
4 or 5
T/F at age 8, 9, 10 premolar eruption is greatly accelerated because of premature primary molar loss
True
review sequence of eruption in perm teeth
look on slides
what are 4 common problems associated with eruption of perm teeth?
1-deficiency in arch length
2-overbite
3-need for space maintainers
4-delayed tooth eruption
what are natal teeth?
teeth present at birth
what are neonatal teeth?
teeth that erupt during first 30 days of life
what is the prevalence of natal/neonatal teeth?
1 per 700-3700
85% of natal/neonatal which teeth?
mandibular primary incisors
what 2 things become a problem if a baby has neonatal teeth
1-nursing…OUCH!
2-lacerations on tongue
what 2 options are available for neonatal teeth?
extract, do nothing
where and what are Epstein pearls?
midpalatine raphe
**remnants of epithelial tissue
where and what are Bohn nodules?
- formed along buccal and lingual aspects of dental ridges and palate
- remnants of salivary gland tissue
*different than Epstein pears
Where and what are dental lamina cysts?
- found on crests of max and mand dental ridges
- remnants of dental lamina
There are three types of inclusion cysts. What are their treatment?
do nothing. lesions with spontaneously shed a few weeks after birth
T/F the eruption of primary teeth is preceded by increased salivation
True
4 visual signs of primary teeth eruption
- restlessness
- drooling
- swelling
- loss of appetite
what 5 things have been incorrectly attributed to teething?
1-croup 2-diarrhea 3-fever 4-convulsions 5-primary herpetic gingivostomatits
what 2 things can treat teething?
1-teething rings
2-OTC antihistamines
what is the 1st choice for space maintenance for ectopic eruption of 1st perm molars?
ortho elastic separators
*as long as access is sufficient to allow for engagement
Besides ortho elastic separators to maintain space for ectopic eruption of perm 1st molars, what are 3 other options?
1-separating springs (enough eruption for insertion between contacts)
2-brass ligature wire (threat between contacts to distalize teeth, require tightening)
3-halterman appliance
when should you remove the primary canine?
when the perm. canine is crossing another root (usually the lateral incisor) by 50%
what teeth are most commonly ankylose?
primary molars
*never in anteriors unless there was trauma
what are the 3 theories of ankylosis?
1-familial pattern (more common in blacks)
2-no perm successors
3-the resorption process isn’t continuous and a reparative process occurs
where does resorption of the primary molars begin?
begins on inner/lingual surfaces
if you have a cooperative patient who is good at 6month recalls, what is the best approach to dealing with ankylosed teeth?
watch and wait
if an ankylosed tooth has no successor, with it exfoliate?
no
*some root resorption may occur
people with cleidocranial dysplasia have _________ prognathism
mandibular
*caused by increased mand length and short cranial bases
people with cleidocranial dysplasia tend to have maxillae that are ___________ vertically but not __________
short, anteroposteriorly
besides missing clavicles and large fontanels, a disguising characteristic of cleidocranial dysplasia is ________
supernumerary teeth
