E - Development Of Palate Flashcards
What defines the development of the palate in gestation?
The separation of the oral and nasal cavities
What creates the intermaxillary segment?
The fusion of the medial nasal prominence with its lateral counter part
What does the intermaxillary segment form
The primary palate and becomes the anterior 1/3 of the of the definitive palate
What does the intermaxillary segment ALSO contribute to?
Labial component of the philtrum and the upper four incisors
The maxillary prominences expand medially to give…
The palatal shelves
Where do the the palatal shelves fuse?
Superior to the tongue
What happens simultaneous to the fusing of palatal shelves?
Developing mandible expands to increase the size of the oral cavity
In what plane do the palatal shelves fuse?
The horizontal plane
What do the palatal shelves fuse to in the vertical plane?
The septum of the nose
When the fused palatal shelves fuse with the septum, what does it form?
The secondary palate
What is a cleft?
A split in the upper lip or the palate
How does a cleft lip form?
When the medial nasal prominences and the maxillary prominences fail to fuse
How does a cleft palate form?
When the palatal shelves fail to fuse or in conjunction with the cleft lip
How common is a cleft?
1/1000 births. 4/1000 in native Americans
Implications of a cleft
Psychosocial implications, recurrent ear infections, speech problems and if very severe, death due to inability to feed
