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Questions and Answers
What is the initial stage of tooth formation called?
What is the initial stage of tooth formation called?
- Bell stage
- Appositional stage
- Cap stage
- Bud stage (correct)
Tooth development begins in which week of intrauterine life?
Tooth development begins in which week of intrauterine life?
- 4th week (correct)
- 8th week
- 10th week
- 6th week
Which cells are responsible for forming enamel?
Which cells are responsible for forming enamel?
- Odontoblasts
- Cementoblasts
- Osteoblasts
- Ameloblasts (correct)
The dental lamina divides into which two processes?
The dental lamina divides into which two processes?
Which of the following is not a stage in tooth development?
Which of the following is not a stage in tooth development?
Which of the following tissues forms dentin?
Which of the following tissues forms dentin?
Which structure in tooth development serves as the primordium for deciduous teeth?
Which structure in tooth development serves as the primordium for deciduous teeth?
The first tooth development occurs in which region?
The first tooth development occurs in which region?
What happens during the bell stage of tooth development?
What happens during the bell stage of tooth development?
During the appositional stage, what forms first?
During the appositional stage, what forms first?
What does the successional lamina give rise to?
What does the successional lamina give rise to?
The process of tooth eruption involves which axial movement?
The process of tooth eruption involves which axial movement?
Anodontia is a condition characterized by:
Anodontia is a condition characterized by:
Which cells differentiate into odontoblasts?
Which cells differentiate into odontoblasts?
What is the function of Hertwig's epithelial root sheath (HERS)?
What is the function of Hertwig's epithelial root sheath (HERS)?
Supernumerary teeth refer to:
Supernumerary teeth refer to:
The stellate reticulum is located between which structures?
The stellate reticulum is located between which structures?
The primary function of the outer enamel epithelium is to:
The primary function of the outer enamel epithelium is to:
The enamel organ gives rise to which structure?
The enamel organ gives rise to which structure?
In the cap stage, the cells located in the concavity are called:
In the cap stage, the cells located in the concavity are called:
During tooth development, which cells form cementum?
During tooth development, which cells form cementum?
Which stage involves the initial formation of the tooth bud?
Which stage involves the initial formation of the tooth bud?
During the cap stage, what causes the enamel organ to take on its characteristic shape?
During the cap stage, what causes the enamel organ to take on its characteristic shape?
Which genetic condition is characterized by a blue-gray discoloration of teeth and affects both primary and permanent teeth?
Which genetic condition is characterized by a blue-gray discoloration of teeth and affects both primary and permanent teeth?
What does the dental papilla give rise to?
What does the dental papilla give rise to?
Which of the following structures disintegrates as teeth develop?
Which of the following structures disintegrates as teeth develop?
During the advanced bell stage, what starts to form?
During the advanced bell stage, what starts to form?
In which stage does enamel mineralization begin?
In which stage does enamel mineralization begin?
What does the outer enamel epithelium provide during tooth development?
What does the outer enamel epithelium provide during tooth development?
The term 'ectomesenchyme' refers to:
The term 'ectomesenchyme' refers to:
The root of a tooth begins forming after:
The root of a tooth begins forming after:
The phenomenon of tooth fusion results in:
The phenomenon of tooth fusion results in:
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Study Notes
Tooth Development Stages
- Initial Stage: Bud stage is the initial phase of tooth formation.
- Start of Development: Tooth development begins at the 6th week of intrauterine life.
Key Cell Types in Tooth Formation
- Enamel Formation: Ameloblasts are responsible for forming enamel.
- Dentin Formation: Dentin is formed by cells called odontoblasts.
- Cementum Formation: Cementoblasts are the cells that form cementum.
Developmental Processes
- Dental Lamina: Divides into the enamel organ and dental lamina.
- Primary Tooth Development: Deciduous teeth originate from the dental lamina.
- Tooth Regions: The anterior mandibular region is where the first tooth development occurs.
Tooth Development Stages
- Cap Stage: During this stage, the enamel organ takes on its characteristic shape due to unequal growth.
- Bell Stage: Crown shape is determined, and enamel mineralization begins.
- Appositional Stage: Dentin forms before enamel during this phase.
Eruption and Other Conditions
- Tooth Eruption: Involves axial movement toward oral epithelium.
- Anodontia: A condition characterized by the complete absence of teeth.
- Supernumerary Teeth: Refers to the presence of extra teeth.
Histological Structures
- Stellate Reticulum: Located between the outer enamel epithelium and inner enamel epithelium.
- Outer Enamel Epithelium: Provides physical protection and nutrition during tooth development.
- Dental Papilla: Gives rise to dentin and pulp.
Developmental Genetics
- Genetic Conditions: Dentinogenesis imperfecta is characterized by blue-gray discoloration of teeth affecting both primary and permanent teeth.
Miscellaneous
- Hertwig's Epithelial Root Sheath (HERS): Guides root formation during tooth development.
- Ectomesenchyme: Refers to mesenchymal cells involved in tooth formation originating from neural crest cells.
- Tooth Fusion: Results from two tooth germs combining, leading to the formation of a single tooth structure.
- Dental Structures Disintegration: The dental lamina disintegrates as teeth develop, which is important in the development process.
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