Face and Palate Development Flashcards
when does the face develop?
4-8 weeks in utero
when does the formation of the palate happen?
6-10 weeks in utero
when is the earliest bone in the skull laid down and which bone is it ?
6/7 weeks and is mandible
how many pharyngeal arches are there?
5 - 1, 2, 3, 4, 6
what pharyngeal arch gives off the trigeminal nerve, muscles of mastication, malleus, incus and meckels cartilage?
1st arch
what are the 5 prominences of face development?
frontonasal prominence, medial nasal prominence, lateral nasal prominence, maxillary prominence, mandibular prominence
which prominence develops to form the forehead and bridge f nose?
frontonasal prominence
which prominence forms the midline nose, philtrum and upper lip?
medial nasal prominence
which prominence forms the alae of the nose
lateral nasal prominence
which prominence forms the cheeks, lateral upper lip
maxillary prominence
which prominence forms the mandibular prominence
lower lip and jaw
which prominences form the intermaxillary process?
medial nasal prominence
which prominences gives rise to the lateral palatal shelves
maxillary prominences
when are nasal and oral cavities separated?
7th and 8th week
describe the growth of the palatal shelves
they grow downwards at first and then rotate upwards towards the midline in a horizontal position where they fuse together to form the secondary palate
what is clef lip and palate
failure of swellings to join
what does cleft lip and palate affect
feeding, speech, hearing, social interactions
what is cleft lip
failure of fusion of maxillary prominence with medial nasal prominence
what is cleft palate
failure of 2 palatal shelves to come together
who does cleft palate occur more in?
females
who does cleft lip occur more in?
males
what are the causes of orofacial clefts?
smoking, alcohol, viral infection, drugs vitamin A analogues
