Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
32 Cards in this Set
- Front
- Back
What is odontogenesis; When does it begin?
|
Tooth Development; primary dentition begins in the 6th and 7th week of development
|
|
What are the stages of odontogenesis?
|
Initiation stage
Bud stage Cap stage Bell stage |
|
Both dentitions form from what?
|
Epithelial and Mesenchymal tissues
|
|
What is the epithelium formed from the outer portion of ectoderm?
|
Oral epithelium
|
|
Tissue that is deep to oral epithelium and it originates from ectoderm
|
Ectomesenchyme
|
|
What separates the Oral Epithlium and the Ectomesenchyme in the stomodeum?
|
The Basement Membrane
|
|
What week does the Dental Lamina form?
|
The 7th week
|
|
From what structure does the dental lamina come from?
|
Oral Epithelium
|
|
What is the first sign of tooth formation?
|
The dental lamina
|
|
Once the dental lamina forms a sheet of epithelial cells, it pushes into what?
|
The underlying mesenchyme in the maxillary and mandibular jaws
|
|
During what week of development does the successional and general lamina form?
|
The 6th week
|
|
Which teeth are formed from the general lamina?
|
The permenant molars
|
|
T/F: During the Bud stage, the basement membrane between the bud and the mesenchyme disintergrates.
|
False!! The basement membrane remains between the two structures
|
|
Rounded, localized growth of epithelial cells surrounded by condensing mesenchymal cells
|
The Bud Stage
|
|
At what stage does the bud enlarge and gain a concave surface?
|
The Cap Stage
|
|
In the Cap stage, what do the epithelial cells change into?
|
The EO (enamel organ). It remains attached to the dental lamina
|
|
What is dental papilla formed from?
|
Mesenchyme
|
|
The dental papilla develops into what two structures?
|
Dental pulp and Dentin
|
|
What is the dental follicle?
|
Tissue surrounding the EO and dental papilla
|
|
What forms the DEJ (dentinoenamel junction)?
|
The basemen membrane between EO and dental papilla
|
|
What week of development does the initiation for the permanent anterior dentition begin?
|
The 10th week
|
|
T/F: The initially formed permanent teeth appear as an extension of the dental lamina lingual to the primary tooth germ
|
True
|
|
During the Bell stage, the OE changes into what two structures?
|
The outer enamel epitheium (OEE) and the inner enamel epithelium (IEE)
|
|
The IEE changes into what?
|
Ameloblasts
|
|
What structure lies between the OEE and IEE?
|
Stellate reticulum
|
|
During the Bell stage, cells in the outer dental papilla becomes what?
|
Odontoblasts
|
|
During the Bell stage, the central cells of the dental papilla becomes what?
|
Pulp primordium
|
|
Odontoblasts forms a matrix of what?
|
Predentin (collagen); calcifies in 24 hrs and becomes dentin
|
|
Which comes first, dentinogensis or amelogenesis?
|
Dentinogenesis
|
|
When does the dental lamina disintergrate?
|
After the differentation of the EO
|
|
The formation of ______ _______ occurs when the differentation of outer cells of dental papilla in the root area become odontoblasts.
|
Root Dentin
|
|
Once the rooth sheath disintergrates, what do the cells become?
|
Epithelial Rests Of Malassez (ERM)
|