Development of palate Flashcards
The palate develops from two primordia and they are
Primary palate
Secondary palate
Palatogenesis begins and ends when
end of 5th week and ends in 12th week
The palate develops in two stages, and they are
Primary
Secondary
When does the primary palate starts developing
early in the 6th week
The primary palate is formed by
fusion of two medial
nasal prominences as median palatine process
The fusion of the medial nasal prominences forms a wedge-shaped mass of mesenchyme opposite upper jaw carrying four incisor teeth called
Primary palate
The primary palate ossifies to forms the anterior and midline aspect of the maxilla called the
premaxilla
The premaxilla represents what
only a small part of the hard palate anterior to the incisive fossa
The secondary palate is the primordium of
the hard and soft parts of the palate located posterior to incisive fossa
Secondary palate starts developing when
early in 6th week
Secondary palate is formed by
fusion of two mesenchymal projections called palatine
shelves from inner aspects of the maxillary prominences
Another name of palatine shelves
lateral palatine processes
At what week does the palatine shelves assume horizontal position above the tongue and form secondary palate
during 7th and 8th week
Once the palatine shelves are fused, what happens
The ossification of the maxilla and palatine bones extend into the lateral palatine process forming the hard palate
How is the soft palate formed
The posterior parts of the palatine shelves do not ossify. They extend posteriorly beyond the nasal septum and fuse to
form the soft palate, including its soft conical projection,
the uvula.
