Chapter 5 development of orofacial structures

  1. Primary Palate Formation: forms from?
    what does it separate? gives rise to?
    • Intermaxillary Segment
    • nasal and oral cavities
    • anterior incisors
  2. Secondary Palate Formation:
    bilateral palatal shelves form from?
    what direction do they grow at first?
    then what do they do?
    once they fuse what do they form?
    • Maxillary processes
    • downward
    • snap upward
    • secondary palate
  3. what does the tongue do so it doesnt get in the way of the "snap"?
    from where to where?
    • moves
    • from the pharynx to the oral cavity
  4. Maxillary Processes
    Secondary Palate Formation
    gives rise to
    • maxillar canines
    • posterior maxillary teeth
    • soft palate
    • uvula
  5. when the palate is complete what is fused?

    if there is failure of fusion what is it called?
    the primary and secondary palate

    Cleft Uvula and Cleft Palate
  6. Cleft Uvula
    • Fig A Pg 46 mildest form
    • palatal shelves didnt fuse completely in the back
    • (milk up the nose)
  7. Bilateral Cleft of the Secondary Palate
    Fig B Pg 46 Palatal shelves didnt fuse to each other at all
  8. Cleft of the Pramary Palate
    Fig C&D Pg 46 Primary palate didnt fuse with secondary palate
  9. Cleft of both Promary and Secondary Palate
    Fig E Pg 46 nobody felt like fusing
  10. II. Nasal Cavity and Septum Development
    Septum develops from the ----- then fuses with the -----.
    what does it divide?
    what is "deviated"
    • intermaxillary segment palate
    • nasal cavity
    • cause snoring and other sinus problems
  11. III. Tongue Development
    where does it happen?
    then where does it move to?
    • pharynx
    • oral cavity
  12. Tongue Development
    Bodyof tongue formation starts with:
    A. tuberculum impar where at?
    behind branchial arch I
  13. Tongue development
    Body of tongue starts with tuberculum impar (A) then two lateral lingual swellings (b)
    Two lateral lingual swellings B. develop on each side of the tuberculum impar.
  14. tongue development
    body of tongue starts with tuberculum impar (A) then two lateral lingual swellings (b) what do these form?
    these fuse and overgrow the tuberculum impar to form the body of the tongue.
  15. tongue development
    body of tongue
    midline lingual frenum what do the cells do?
    what is it called when this is too long and restricts movement?
    midline lingual frenum

  16. tongue development
    Base of the tongue formation: branchial arch 2 & 4
    C. Copula what is i,t where does it come from and what does it form?
    • is a swelling from branchial arch 2
    • forms the base of the tongue
  17. Tongue Development
    Base of the tongue Formation
    D. Epiglottic swelling were does it come from and what does it form?
    • comes from branchial arch 4
    • will become the epiglottis that covers the trachea when you swallow
  18. Tongue Development
    Completion of Tongue Formation
    Copula fuses with?
    marked by?
    • Tongue body
    • sulcus terminalis (where body and base meet)
  19. Tongue Development
    Completion of Tongue Formation
    The ------ points backward to a depression called the -----.
    • sulcus terminalis
    • foramen cecum
  20. tongue Development
    Completion of Tongue formation
    the foramen cecum is the beginning of the?
    • thyroglossal duct
    • (thyroid develops here and migrates to neck)
  21. Tongue Development
    completion of tongue formation
    the tongue is innervated by ---- of nerves because the tissue came fromso many different branchial arches.
    lots (five)
Card Set
Chapter 5 development of orofacial structures
palatal development, nasal cavity and septum development & tongue development.