Odontogenesis- Exam 1 Flashcards
What 4 components make up the tooth?
enamel, dentin, cementum, pulp
What 4 components make up the periodontium?
ginigiva, periodontal ligament, cementum, and alveolar bone proper
List the 6 stages of tooth development?
- initiation
- bud stage
- cap stage
- bell stage
- apposition
- maturation
During the initiation stage of tooth development what occurs?
cellular induction
During the bud stage of tooth development, what occurs?
cellular proliferation
During the cap stage of tooth development, what occurs?
proliferation, differentiation, and morphogenesis
During the bell stage of tooth development, what occurs?
proliferation, differentiation and morphogenesis
During the apposition stage of tooth development, what occurs?
induction and proliferation
During the maturation stage of tooth development, what occurs?
maturation
What plays an instructional role during the pre-tooth bud stage of tooth formation?
epithelium (ectoderm)
What dictates what type of tooth will be formed?
neural crest cells (mesenchyme)
The enamel organ is derived from:
primitive oral ectoderm
What 3 structures are prominent during the induction stage of tooth development?
- oral ectoderm
- neural crest cells
- dental lamina
When does the induction stage of tooth development occur?
6-7th week
During the induction stage, when the ectoderm invaginates into the mesenchyme, it can now be referred to as:
dental lamina
THe dental lamina is separated from the surrounding mesenchyme by a:
basement membrane
When does the bud stage of tooth development occur?
8th week
During the bud stage of tooth development, the proliferating oral ectoderm makes the transition into:
dental lamina
When does the early cap stage of tooth development occur?
9-10 weeks
During the early cap stage ____ occurs resulting in the creation of buccal vestibule
apoptosis
What help to hold the shape of the enamel organ during the cap stage
stellate epithelium
cells that are still undifferentiated but make their way up into the inner enamel epithelium area:
dental papilla
Some of the dental papilla cells will end up becoming:
odontoblast & pulp
During the cap stage of of tooth development, what surrounds the enamel organ, inner enamel epithelium and dental papilla?
dental follicle
The dental follicle may also be called:
dental sac
The dental follicle encapsulates the entire enamel organ and will eventually become the:
periodontal ligament, cementum, and alveolar bone
At this stage, all layers of the enamel organ can be differentiated:
bell stage
During the bell stage, the inside of the enamel organ is comprised of:
inner enamel epithelium
During the bell stage, the enamel organ is covered by ____ on the outside
outer enamel epithelium
The double layer of flattened cells on top of the inner enamel epithelium during the bell stage:
stratum intermedium
During the bell stage, the loosely packed cells on the inside of the stratum intermedium:
stellate reticulium
The rounded cells lining the basement during the bell stage:
pre-odontoblasts
The outer enamel epithelium is comprised of ___ cells and serves as ____.
cuboidal cells and serves as a protective barrier
The inner enamel epithelium is comprised of ____ cells and differentiates into:
cuboidal cells; ameolblasts
The stellate reticulum are ____ shaped cells forming the network inside the _____.
star-shaped; enamel organ
What serves as the supportive function in enamel production:
stellate reticulum & stratum intermedium
The stratum intermedium is a compressed layer of _____ cells
flat cuboidal cells
The dental sac consists of ____ fibers around the ____
collagen; enamel organ
What will the dental sac eventually differentiate into?
- cementum
- PDL
- alveolar bone
The cells nearest to the IEE that have basement membrane separation:
dental papilla
The outer cells of the dental papilla differentiate into:
odontblasts
The inner cells of the dental papilla differentiate into:
pulp tissue