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39 Cards in this Set
- Front
- Back
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What is odontogenesis (4) |
Indefinite process that is NOT clear cut One of the longest developmental processes Occurs during the Fetal perod for permanent teeth Occurs during the Prenatal period for primary teeth |
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What does Ondonto stand for |
Tooth |
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What does Genesis stand for |
Development/production of |
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What are the 5 different stages |
Initiation Bud Stage Cap Stage Bell Stage Maturation and Apposition |
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INITIATION STAGE |
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When does the initiation stage occur |
Prenatal 6-7 weeks |
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What happens during the initiation stage (4) |
Mesenchymal tissues induce ectodermal tisues Ectoderm lines stomedeum/primitive mouth Ectoderm (outer portion) turns into ORAL EPithelium Epithelium grows into the ectomesenchyme and creates dental lamina |
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What is deep to the oral epithelium |
Ectomesenchyme |
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Ectomesenchyme is affected by what |
Neural Crest Cells |
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What is located between the oral epithelium and ectomesenchyme |
Basement membrane |
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What does the basement membrane do |
Seperates two tissue types of layers |
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What does dental lamina do eventually |
Create dental arches and primary teeth |
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BUD STAGE |
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When does the Bud stage occur |
8th week approx. |
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What is the bud stage (6) |
Dental Lamina extensive proliferation (Cell growth)
Buds have arrived and are surrounded by ectomesenchyme ectomesenchyme is also proliferating at the same time Tooth bud and ectomesenchyme are still seperated by the basement membrane Where there will not be teeth it becomes thick dental lamina and then into oral mucosa Dental lamina has then dissolved and gone
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Where there will not be teeth what does it become |
Thick dental lamina then into ora mucosa |
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CAP STAGE |
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When will the cap stage occur |
9th-10th week |
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What happens in the cap stage (7) |
Differentiation and Morphogenesis Ectomesenchyme and dental lamina grow at different rates ENAMEL ORGAN is now fabricated ENAMEL ORGAN= the CAP (or half moon shaped object Also produced is the dental papillae and Dental sac which is known as the care package At the end of the Cap stage the tooth germ is produced Succesional dental lamina is initiating your permanent anterior teeth (10th week) |
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What will the enamel organ do |
make ENAMEL ONLY |
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What was the enamel organ produced by |
ECTODERM (this is a hard tissue) |
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What will the dental papillae produce |
Dentin and Pulp |
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What will the dental sac produce |
Cementum Periodontal ligament Bone Creates: periodontium |
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What is the dental papillae |
The mesenchyme that is trying to be inside or under the cap in the concavity |
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What is the dental sac |
The rest of the ectomesenchyme that surrounds the outside of the CAP (Grocery Bag) |
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What is included in the tooth germ |
Enamel organ Dental papillae Dental sac (primordium of the tooth) |
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BELL STAGE |
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When does the Bell Stage occur |
11th-12th week |
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What occurs during the Bell Stage |
Proliferation Differentiation Morphogenis (Still happening but still at different areas and rates) Outer Enamel Epithelium Inner Enamel Epithelium Dental Papilla forms outer cells of the Dental Papilla. These cells will turn into Odontoblast to create dentin |
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What is the outer enamel epithelium |
Cuboidal The outside lining of the bell/cap( not where the ectomesenchyme is trying to be inside the cap/bell ACTS AS PROTECTION |
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What is the Inner Enamel Epithelium |
Columnar Inner lining of the Bell (the lining that is covering the concave portion WILL BECOME AMELOBLASTS Stellate Reticulum and Stratum Intermedium both support the growth of enamel . |
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What is the Stellate Reticulum |
Star designs on the surface of the BELL |
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Stratum Intermedium |
Flattened cells between the STARS and the INNER ENAMEL EPITHELIUM |
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MATURATION AND APPOSITION STAGE |
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What occurs during the maturation and apposition |
Apposition: Secretion of Enamel, Dentin, Cementum in layers Inductions occur between dental papillae, Sac, Enamel Organ, Mesnchymal tissues this is assisted by the basement membrane Basement membrane is the wireless network that allows all of the members to communicate Maturation= Everything is hard, set and ready (Mineralized) |
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VOCABULARY |
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Proliferation |
These test are growing in numbers in a controlled manner |
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Differentiation |
We will all differentiate into a very specific person with a distinct role and function |
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Maturation |
Some DAY we will all be Fully developed dental hygienist due to proliferation, differentiation, and morphogenesis |
