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Orofacial Structures and Tooth Development & Eruption QUIZ

Contributed by:

Andrea and Cristal
SDH  PRCC, MS
  1. What 2 structures form the palate & When?  
  2. When is the palate completed? 
  3. The intermaxillary segment is a wedge shaped mass that gives rise to the primary palate? 
  4. How is the intermaxillary segment formed? 
  5. What structure does the intermaxillary segment become? 
  6. What does the primary palate form?   
  7. T/F The primary palate is the 1st & final stage of palatal development.
  8. The fusion of the 2 palatal shelves forms:  
  9. What does the secondary palate form?  
  10.  The suture lines on anterior 1/3, on either side are rugae, line of fusion of palatal shelves:
      
  11. When does the oral cavity become separated from the nasal cavity?  
  12. What forms palatal muscles?  
  13. The incisive foramen is present at the junction of the primary & secondary palates, what does it become?
  14. What causes cleft palate?  
  15.  The nasal septum is formed by:  
  16. Brachial arches 1-4 form:  
  17. The body of tongue develops from which brachial arch?  
  18. Brachial arches 2 3 & 4 form:  
  19. The body of the tongue begins here:  
  20. Where is the tuberculum impar located?  
  21. What part does the copula have in formation of the base of tongue?
      
  22.  Inverted V shaped groove that shows the border between base of tongue and body?  
  23.  What does the sulcus terminalis point back to?  
  24. Thyroglossal duct =  
  25.  The tongue reaches its maximum size at what age?  
  26. What is a cause of ankyglossia?  
  27.  Odontogenesis:  
  1.  List the stages of tooth development & when do they occur:
  1. Matching

a. Initiation Stage

 -  bud turns concave & forms cap.

b. Bud Stage

 - induction/interaction between cells.

c. Cap Stage

 -  proliferation, differentiation, morphogenesis

d. Bell Stage

 -  Induction, Proliferation, Maturation.

e. Apposition/ Maturation

 -  proliferation, differentiation: tooth bud is becoming structurally & functionally different. Morphogenesis: takes on specific tissue characteristics. Occurs in uequal growth patterns.

 

 -  Dental lamina grows/ evolves into a bud.

 

 -  The primative mouth lined with ectoderm & leads to formation of oral epithelium & below that layer is a layer of mesenchyme. Oral epithelium layer will continue to grow & form dental lamina.

 

 -enamel organ differentiates into 4 layers.

 

 -  final stage is amelogenesis.

 

 -  prolifration/ controlled levels of cellular growth with accumulation of by products.

 

  1. Dental Lamina:  
  2. Describe developmental disturbances during the Initiation Stage:
  1. How many buds are in each arch?  
  2.  All teeth & their associated tissues originate from what embryonic tissues?  
  3.  Developmental disturbances during Bud Stage:
  1. What makes up a tooth germ:  
  2.  Describe enamel organ:  
  3.  Describe dental papilla:  
  4. Describe the dental sac:   
  5.  Developmental disturbances during Cap Stage:

40. Fill in the chart for the Bell Stage, the enamel organ differentiates into:

         

1st

Outer enamel epithelium

Cube shaped cells

Protective barrier to enamel organ.

2nd

 

Tall columnar cells

 

 

3rd

Stellate recticulum

Cells are star shaped

Help support production of enamel.

4th

 

Flat cells

 

 
  1. What are the 2 layers does the dental papilla differentiates into:
  1. Amelogenesis:  
  2. Ameloblasts:  
  3.  The enamel matrix is secreted from what structure?  
  4.  Tome’s process:  
  5.  Developmental Disturbances during Apposition & Maturation Stage:
  1. Describe root development:  
  1.  Epithelial rests of Malassez:   
  1.  Developmental Disturbances during root development:

Disclaimer: These notes were copied and pasted from files sent to me by Andrea.  They have not been reviewed for errors. You are responsible for checking out the information to verify the accuracy. This site, Amy Nieves and Andrea are not responsible for typographical errors.

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