07 Anomalies of Eruption and Exfoliation Flashcards
______ % of natal teeth are true primary teeth
90%
When do neonatal teeth erupt
1st 30 days
Which are more common neonatal v. natal teeth
natal
Structures commonly mistaken for erupting primary teeth:
_____ nodules
dental ______ cysts
______ pearls
Bohn’s
Lamina
Epstein’s
This is an island of bone attached to tooth
Eruption sequestrum
What arch does eruption sequestrum typically happen in
mandibular
This is a displacement or malposition of erupting teeth
Ectopic eruption
What can cause ectopic eruption
crowding over-retained primary teeth supernmerary teeth missing teeth infection/caries
What tooth is the most likely to have an ectopic eruption
Maxillary 1st molar (6-7 years)
What percent of kids have and ectopic eruption
5% (22% with cleft lip/palate)
When might ectopic eruption self correct?
Under age 7
tooth locked only in enamel/dentin
When is self correction rare
over 7
locked into pulp
mesial angulation > 3mm
if 2nd primary molar is mobile
This shows that a tooth came in ectopically and corrected
Resorption of the adjacent primary tooth
What treatment can cause ectopic eruption
SSC fitted improperly
This tooth normally erupts and resorbs the root of the primary canine
permanent lateral
Lateral Incisor ectopic eruption Tx
- extract _______ primary canine to allow possibility of midline ________
- Make a lower lingual _______ arch to prevent _______ of permanent incisors
- ortho and serial extraction
contralateral
normalization
- holding, tippingEc
ectopic eruption of central incisors
erupt lingually
Treat ectopic maxillary central incisor
extract primary central immediately
treat ectopic mandibular central incisor
let tooth exfoliate on own
Where do ectopic canines erupt
facially over over retained primary canine
Where do ectopic premolars erupt
facial to and over-retained molar
When does a tooth become over-retained
adjacent to permanent tooth replacement for 6 months or more
When do permanent incisors erupt
when 1/2 of more of root is complete
Canines/Premolars at 2/3 root completion
Ankylosis
- May occur at any time during _____
- Consists of localized _______ of PDL space
- May be _____ or bony
- Diagnosis if the tooth remains _______ in the alveolus and the adjacent areas continue to grow
- Permanent teeth after ______, complication of re-______
- Eruption
- Obliteration
- Fibrous
- Stationary
- traume, implantation
What percent of primary teeth get ankylosed?
7-14%
What is the most common tooth to get ankylosed?
Mn 1st Primary Molar
Impacted Maxillary Canines:
___% incidence
Treatment is _____ of primary canines
2
extraction
What is the key to treatment and prevention of impacted canines
early diagnosis
How do you look for impacted canines on an x-ray
Permanent canine is overlapping the pulp of the permanent lateral incisor
What is the problem with an abnormal maxillary frenum
Diastema
When should you order a frenectomy
after permanent incisors and canines have eruption and ortho is finished
What does ankyloglossia mean
tongue tied
What is the influence of premature primary molar loss on eruption of successor?:
- 5 years or younger
- 5-8
- 8 +
- Delayed eruption (bone reformed)
- Little effect
- Accelerated eruption
This is dependent on duration, frequency and intensity
Sucking habits
Consequences of too much paci/sucking
anterior open bite
palatal constriction
posterior x-bite
severe overjet
Treatment for sucking habit
child must want to quit
don’t punish
use appliances
Treatment for sucking
- 0-4 years
- 5-8
- 8+
- Pull out paci after kid is asleep
- positive reinforcement/appliance
- appliance/ortho
