Disturbances Flashcards
What is anodontia?
A condition without teeth; can be genetic or induced.
What is oligondontia?
Having few or scant teeth.
What is supernumerary teeth?
Having too many teeth.
What regions do supernumerary teeth typically occur?
- 3rd molar region
- Mandibular pre-molar region
- Mesiodens (between 8 &9)
- Cleidocranial dysplasia
What region do the supernumerary teeth typically arise palatally?
mesiodens
What stage does anodontia, oligodontia, and supernumerary teeth occur?
Initiation stage.
True or False; if you are missing a primary tooth you most likely will be missing that permanent tooth.
True; there is no successional dental lamina for the permanent tooth.
What are possible bud stage distrubances?
Microdontia & Macrodontia
What is microdontia?
Teeth are too small
What is macrodontia?
Teeth are too large
What are possible cap stage disturbances?
Dens in dente
Gemination
Fusion
(during morphogenesis so it effects shape)
What are distrubances associated with apposisiton/maturation?
Concrescence
Enamel Pearls
What is concrescence?
When two teeth fuse together.
What are enamel pearls?
Ameloblasts that form enamel around the basement membrane.
What is an ondontoma?
Tumor of enamel, dentin, pulp and cementum
Where are compound ondontomas typically found?
Mandibular pre-molar region
Where are complex ondontomas typically found?
Radiopaque typically seen in maxillary molars.
What is a dilaceration?
Sharp, acute end in the crown or root of the tooth. Typically seen in the root.
What are dwarfed roots?
Extremely short roots compared to the crown. Normal root to crown ratios are 2:1, dwarfed are 1:1
What is hypercementosis?
Excessive deposit of secondary cementum
What is a cementoma?
Excessive deposit of secondary cementum that destroys bone in the process.
