Tooth Anomalies (p. 308) Flashcards
What is dentinogenesis imperfecta?
What happens to the dentin?
What happens to the enamel?
In which teeth will it occur?
- Tooth has a translucent hue so that the color of dentin is seen
- Dentin fills the entire tooth, including pulp chambers and canals
- Enamel chips away from the dentin
- Occurs in primary and permanent teeth of the same patient
What is dentin dysplasia?
Dentin obliterates the pulp chamber. BUT tooth has a normal color and the enamel does not chip away.
What two things can cause interglobular dentin?
- Poorly calcified areas called dead tracts
- Odontoblasts that have died and left empty dentinal tubules
What is sclerotic dentin?
When tubules have filled up with dentin and appear transparent in the roots
What are pulp stones?
Small, circular, calcified areas in the pulp
What are enamel pearls?
Where do they usually form?
Epithelial root sheath cells remain and become ameloblasts, which form enamel on the roots. Usually form in the bifurcation or trifurcation of the roots
What are accessory root canals?
Defects during roof formation cause accessory canals to form in apical region
- What are epithelial rest cells?
- Where are they found?
- Anything else?
- Remaining cells of the epithelial root sheath.
- Found in periodontal space adjacent to the tooth.
- If mitotic division occurs later, periodontal cysts will develop.
What is hypercementosis?
Deposition of excessive amounts of cementum usually at the apex and along the entire surface of the root
What is a cementoma?
What is it associated with?
Hypercementosis. Associated with localized destruction of bone
What is an odontoma?
A tumorous anomaly of calcified dental tissue
What counts as “calcified dental tissue”?
Enamel, dentin, pulp, and cementum
What is a complex?
A single mass of dentin, cementum, and enamel in a large blob of unspecified shape
What is a compound?
Several small masses resembling rudimentary teeth
What are rudimentary teeth?
Teeth of abnormal shape and smaller size
