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Questions and Answers
What is the main focus of the workbook mentioned in the content?
What is the main focus of the workbook mentioned in the content?
What are the three phases of eruption?
What are the three phases of eruption?
What is the primary function of the dento-gingival junction?
What is the primary function of the dento-gingival junction?
Which of the following stages is NOT part of the development of teeth?
Which of the following stages is NOT part of the development of teeth?
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Which feature is associated with the dento-gingival junction?
Which feature is associated with the dento-gingival junction?
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What is one of the stages included in the eruption process of teeth?
What is one of the stages included in the eruption process of teeth?
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Which term best describes the phase preceding a tooth's eruption?
Which term best describes the phase preceding a tooth's eruption?
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What is a key feature of the advanced bell stage in tooth development?
What is a key feature of the advanced bell stage in tooth development?
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Which of the following is NOT a labeling feature commonly associated with tooth eruption?
Which of the following is NOT a labeling feature commonly associated with tooth eruption?
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What is the main role of ameloblasts after the completion of amelogenesis?
What is the main role of ameloblasts after the completion of amelogenesis?
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During which stage of tooth development does the eruption process begin?
During which stage of tooth development does the eruption process begin?
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What is the formation of the reduced enamel epithelium primarily associated with?
What is the formation of the reduced enamel epithelium primarily associated with?
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Which of the following statements about the eruption process is accurate?
Which of the following statements about the eruption process is accurate?
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What happens to ameloblasts after the enamel has been formed?
What happens to ameloblasts after the enamel has been formed?
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In what manner does the reduced enamel epithelium assist during tooth eruption?
In what manner does the reduced enamel epithelium assist during tooth eruption?
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What is the role of the stellate reticulum during tooth development?
What is the role of the stellate reticulum during tooth development?
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Which option describes a function of outer enamel epithelium?
Which option describes a function of outer enamel epithelium?
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Study Notes
Embryology of Eruption and Exfoliation
- This workbook is for use in conjunction with lectures and powerpoints on the embryology of eruption and exfoliation
- Learning resources and reading include a textbook, Chapter 10 of Ten Cate's Oral Histology: Development, Structure, and Function(9th edition) and articles:
- Eruptive Tooth Movement: Craddock HL, Youngson CC. Br Dent J. 2004; 197(7): 385–391. PMID: 15475894
- Critical review on the theories of tooth eruption by Marks et al. (1996)
- Recent advances in understanding theories of eruption Rabea A.A. Future Dental Journal, 2018; 4(2): 189-196.
- Online resources: Atlas of tooth development and eruption (https://www.qmul.ac.uk/dentistry/atlas/); Digital laboratory oral histology slides (http://www.uky.edu/~brmacp/oralhist/module3/lab/oh3main.htm)
- Lecturer: Miss Lauren Stockham [email protected]
Section 1: Link Embryological Knowledge to Eruption
- Label cells associated with enamel organ in advanced bell stage (stellate reticulum, stratum intermedium, ameloblasts, outer enamel epithelium)
- Ameloblast cell lifecycle: role complete amelogenesis is
- Mineralization of enamel matrix secreted by them
- Reduction in size, forming a protective layer with remaining cells of enamel organ
- Apoptosis with disappearing stellate reticulum
- Use of Tome's process to secrete enamel matrix
- Differentiation into cementoblasts, forming root
Section 2a: Questions During the Session
-
Eruption process of teeth:
- Starts during bell stage of tooth development
- Starts after birth for all primary teeth
- Starts once root formation of a tooth is complete
- Starts at the same time as crown formation begins
-
Reduced enamel epithelium:
- Forms a protective layer over tooth root during eruption.
- Forms from ameloblasts during amelogenesis.
- Surrounds developing tooth crown during eruption
- Fuses with oral epithelium to form periodontal attachment with the tooth
Section 2b: Questions Post-Session
-
Three phases of eruption include: primary eruption, permanent eruption, and exfoliation; pre-eruptive, active eruptive, and post-eruptive; crown formation, root formation, and eruption; pre-eruptive, intraosseous, and supraosseous
-
Dento-gingival junction importance:
- Protect crown with reduced enamel epithelium
- Seal oral cavity from internal environment
- Enable tooth eruption
- Form gingival sulcus with the tooth root
Section 3: Consolidating Knowledge and Understanding
- Identify and describe 4 stages of development in a diagram (e.g.: Active eruption of primary incisor, root formation of primary incisor, advanced bell stage of permanent successor, dento-gingival junction formation)
- Label features including permanent successor and oral epithelium
Section 3b: Clinical Application
- Look at radiographic image and identify any anomalies in tooth eruption patterns
Section 4: Additional Learning
- Investigate theories of eruption further using recommended articles
Section 5: Glossary of Terms
- (No specific terms provided)
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