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38 Cards in this Set
- Front
- Back
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What develops from the dental lamina?
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All primary teeth and the first permanent molars
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Succedaneous teeth develop from what?
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Primary tooth buds
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What causes congenital absence of teeth?
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Lack of initiation or arrest of proliferative cells
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Continued budding of what causes supernumerary teeth?
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Enamel organ
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Define eruption
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Crown formation is complete
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What is emergence and when does it occur?
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Appearance of a tooth in the oral cavity (typically called "eruption")
It occurs when the root is 3/4 developed. |
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How long does it take from crown completion to full occlusion in permanent teeth?
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5 years
So about the same as dental school. |
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There is evidence of mineralization of how many teeth at birth?
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24
20 primary teeth + four permanent 1st molars |
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Which teeth show germ formation before birth?
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Incisors
Canines Permanent 1st molars |
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True/False: environmental factors affecting the onset of menarche also change the age of emergence of some teeth.
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False.
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Extraction of primary teeth will (enhance/delay) eruption of permanent teeth?
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Either, before age 5 delays eruption
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What is the most desirable eruption pattern of permanent teeth?
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1M → C → L → 1P → 2P → K9 → 2M
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Late K9 eruption is bad for which gender?
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Boys - lost space
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What is always the safest tooth to extract, orthodontically speaking?
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Premolars
Canines are the WORST! |
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What does CA = 11-5 mean?
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Chronological Age:
11 years, 5 months |
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Permanent incisors erupt B or L?
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Lingual, baby
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A lack of developmental __ is a predictor of future crowding.
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Developmental spaces
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What erupts at DA (dental age) 6?
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Mand centrals & 1st molars
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What erupts at DA (dental age) 7?
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Max centrals & Mand laterals
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What erupts at DA (dental age) 8?
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Max laterals
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What erupts at DA (dental age) 9?
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Nothing! Quiescent period lasting 2-3 years, roots develop, though.
(largely mandibular) |
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What erupts at DA (dental age) 11?
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Mand premolars, Max 1st pre
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What erupts at DA (dental age) 12?
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Anything that hasn't erupted yet will erupt now.
God, that sounds so wrong! It's not, though, seriously. |
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What is leeway space?
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A bit of space (2.5mm mand, 1.5mm max) we can use to relieve crowding.
My source: http://www.orthonj.com/leeway.html |
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What are the primate spaces?
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"in the primary dentition, a space mesial to the maxillary primary canines and distal to the mandibular primary canines"
My source: http://www.uic.edu/depts/dort/glossary.html |
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3-3 (intercanine) width is established by what age?
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8
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Primary incisors procline. Why?
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Tongue activity.
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What is proclination?
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Labial movement
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What device can a DDS place that will help maintain leeway space for the poor, defenseless orthodontist?
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Fixed Lingual Arch
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What is Tx for eruption of Mand incisors with crowding?
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Nothing! They will often fix themselves.
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A distal step (primary) leads to what?
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Class II or end-to-end (also CII)
Refer! |
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What do terms like flush, distal and mesial step refer to?
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Terminal Plane Relationships
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At what stage does the mandible primarily change?
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Adolescence
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When do dentofacial changes stop occurring?
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When changes like earthworms eating your eyeballs start occurring...
DEATH!! |
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When does most eruption occur?
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At night
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What causes Mand incisal crowding post adolescence?
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Incisors retrocline
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True/False: 3rds do not play a role in crowding.
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True!
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What are the three stages of tooth development?
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Bud, Cap and Bell!
Bud stage - initiation Cap stage - proliferation Bell stage - histo / morphodifferentiation |
