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35 Cards in this Set
- Front
- Back
What is the fifth stage in odontogenesis |
apposition |
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growth by layers |
apposition |
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involves thephysiological processes of induction and proliferation |
appositional stage |
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the enamel, dentin, and cementum aresecreted in successive layers during what progess
|
apposition |
|
an extracellular substance that ispartially calcified yet serves as a framework for later calcification |
matrix |
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What is the sixth and final stage of odontogenisis |
maturation |
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what occurs when the dental tissues subsequently fully mineralize
|
maturation
|
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Tooth development begins in the _____ and then proceeds to the_________. |
Crown & Root |
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After the formation of the IEE in thebell-shaped enamel organ, the cells differentiate into
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preameloblasts
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During differentiation of enamel organ cells into preameloblasts, the nucleusof each cell moves away for the center to the position farthest away from thebasement membrane. This movement occursduring _______ ___________?
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cellular repolarization
|
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moving away from the basement membrane |
repolarization |
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odontoblasts begin what |
dentinogenisis |
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secreting predentin |
dentinogenisis |
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apposition involves which two physiological processes |
induction and proliferation |
|
During apposition what is secreted in successive layers? |
enamel, dentin, & cementum |
|
enamel, dentin, and and cementum are initially secreted as |
matrix |
|
The sixth stage of odontogenesis involves which physiological process? |
maturation |
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After the IEE differentiates into preameloblasts during the maturation stage of odontogenesis what happens? |
the outer cells of the dental papilla are induced by the preameloblasts to differentiate into odontoblasts |
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what takes place due to odontoblasts undergoing repolarization in the maturation stage of odontogenesis? |
their nuclei move from the center to a position that is farthest from the basement membrane |
|
after odontoblasts undergo repolarization what happens? |
the odontoblasts nuclei line up in mirror image to the preameloblasts location on the other side of the basement membrane. |
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after the odontoblasts nuclei line up in mirror image to the preameloblasts location on the other side of the basement membrane |
the odontoblasts begin dentinogenesis |
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apposition of dentin matrix on their side of the basement membrane |
dentinogenesis
|
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dentin matrix |
predentin
|
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when do odontoblasts begin dentinogenesis? |
after the odontoblasts nuclei line up in mirror image to the preameloblasts location on the other side of the basement membrane
|
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even though the preameloblasts forms first |
the odontoblasts start their secretions first. |
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After differentiation of odontoblasts and the formation of predintin |
the basement membrane between the preameloblasts and odontoblasts begins to disintegrate |
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when the basement membrane between the preameloblasts and odontoblasts begins to disintegrate it allows what to happen? |
preameloblasts to become in contact with the newly formed predentin |
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when the preameloblasts contact newly formed dentin it induces what |
the preameloblasts to differentiate into ameloblasts. |
|
apposition of enamel matrix |
amelogenesis |
|
the enamel matrix is secreted from |
Tomes' Process |
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a tapered portion of each ameloblast that faces the disintegrating basement membrane |
Tomes' Process |
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WIth the enamel matrix in contact with the predentin what occurs? |
mineralization of the disintegrating basement membrane takes place |
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when the mineralization of the disintegrating basement membrane takes place due to the enamel matrix and predentin coming in contact with each other what is formed
|
the dentinoenamel junction (DEJ) |
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attached cellular extensions in the length of the predentin |
odontoblastic process |
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odontoblastic process is contained in a mineralized cylinder called |
dental tubule |