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27 Cards in this Set
- Front
- Back
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List the four stages of tooth development.
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Growth
Calcification Eruption Attrition |
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List the stages of tooth growth.
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Initiation
Proliferation Histodifferentiation Morphodifferentiation Apposition |
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Teeth erupting within 30 days of birth, or prior to birth, are called what?
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Natal teeth
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95% of natal teeth are what?
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Prematurely erupting centrals.
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Why would we opt to intervene if natal teeth are present?
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Extreme mobility - aspiration risk
Verified supernumerary (x-ray) Poor tooth development Feeding problems - smoothing is an option |
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During what phase of development do supernumerary teeth appear?
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Initiation
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What is a "mesiodens"?
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Supernumerary teeth in the maxillary midline (common location)
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In what population are mesiodens most common?
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Native Americans
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Congenitally missing teeth may be associated with what systemic disorder?
Hint: think Embryology, origin of ameloblasts... |
Ectodermal Dysplasia
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What are the three most common teeth to be congenitally missing?
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Laterals, Premolars, Thirds
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Gemination is more commonly (and descriptively) termed __
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Twinning - attempt of one tooth bud to become two separate teeth
Most common in incisors |
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Histodifferentiation disorders include what "imperfect" conditions?
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Amelogenesis imperfecta
Dentinogenesis imperfecta |
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How is amelogenesis imperfecta best treated?
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Fixed prostho due to weakness of existing enamel (composites often fail)
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A variation of amelogenesis imperfecta in which the enamel is calcified normally, but severely pitted is what type?
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Hypoplastic type
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Dentinogenesis imperfecta is a disorder of which embryologic tissue precursur?
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Mesoderm
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What are some diagnostic features of dentinogenesis imperfecta?
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Normal enamel chips easily (not supported)
"Pulpless" tooth on x-ray Bulbous crowns Blue/Grey colored teeth |
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Dentinogenesis imperfecta is associated with what broader systemic condition?
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Osteogenesis imperfecta
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Dentinogenesis imperfecta usually requires what?
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Complete fixed device
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What is a common morphological problem in Mand molars of Native American patients?
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Extra roots. Lingual root may fracture on extraction, and can "hide" behind others on radiograph. Obvious problem of remaining root tip post procedure.
Also a problem for endo - RCTx fails due to untreated root canal. |
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What is taurodontism?
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Enlarged pulp chamber and reduced root length.
Non-pathologic but a tricky RCTx |
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Dens Invaginatus (dens-in-dente) often affects what teeth?
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Max laterals
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What is diagnostic of dens invaginatus on radiographs?
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Hourglass pulp
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What is a major problem with dens evaginatus?
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Extra cusp (usually on premolars) prone to occlusal wear and endo failure.
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What is dilaceration and what generally causes it?
What is the Tx? |
Severely bent root
Caused by trauma Tx: Ext in many cases |
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What differentiates fusion of teeth from gemination?
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Two distinct pulp chambers
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Hypoplastic enamel, localized pits and enamel pearls are all disorders of what development stage?
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Apposition
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What is concresence?
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Joining of two teeth by cementum
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