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Palatal development

Terms in this set (17)

What week of prenatal development does the formation of the palate start?
5th week of prenatal development
During what week is the formation of the palate complete?
week 12 during the fetal period
What are the three stages called that forms the palate?
primary palate formation, secondary palate formation, completion of the final palate
During what week does the intermaxillary segment form?
5th week, w/in the embryonic period
What fuses together to form the intermaxillary segment?
two medial nasal processes within the embryo
Define intermaxillary sinus
internal wedge-shaped mass that extends inferiorly and deep to the nasal pits on the inside of the stomodeum
What does the intermaxillary segement develop into?
floor nasal cavity and the nasal septum
What will the primary palate form in the future?
premaxillary part of the maxilla (anterior 1/3 of the final palate)
During what week are the two palatal shelves formed?
6th week of prenatal development (embryonic period)
Where is the tongue forming during the sixth week of prenatal development?
on the floor of the pharynx
What week is the tongue moved out of the way of the nasal cavity and confined solely to the oral cavity?
completed by the 8th week
What is formed when the two palatal shelves elongate and move medially toward each other, meeting and joining, and fusing?
secondary palate
What does the secondary palate give rise to?
posterior 2/3s of the hard palate; certain anterior maxillary teeth (canines), and posterior teeth, posterior to the incisive foramen, soft palate and its uvula
What indicates the line of fusion of the palatal shelves?
median palatine raphae within the mucosa lining and the deeper median palatine suture on the adult bone
What causes completion of the palate?
the primary palate and secondary palate gradually fuse together in an anterior to posterior direction
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