Development
of face
of face
Meckel’s cartilage:
Place where it is found; cartilage of which
arch; the week at which it is formed – from which structure – forms which
structures – at which week – how it acts as a scaffold for the mandible and the
persistence of the cartilage in adult as the inner ear bones- how mandible
develops from this including the type of ossification
arch; the week at which it is formed – from which structure – forms which
structures – at which week – how it acts as a scaffold for the mandible and the
persistence of the cartilage in adult as the inner ear bones- how mandible
develops from this including the type of ossification
Development of Maxilla & Mandible:
Maxilla: head
development – begins/ends at which week – mesenchymal prominence – development
of medial and nasal process- descent and movement of the process – concept of
premaxilla, primary palate, secondary palate – descent of tongue – fusion of
processes – mechanism involved – clinical significance of non-fusion – clefts
of maxilla – Diagrams Mandible: week of initiation in IUL – Meckel’s cartilage
formation – Place where it is found; cartilage of which arch; the week at which
it is formed – from which structure – forms which structures – at which week –
how it acts as a scaffold for the mandible and the persistence of the cartilage
in adult as the inner ear bones- how mandible develops from this including the
type of ossification – Growth of mandible – development of lingual, nerve innervation’s and blood supply
development – begins/ends at which week – mesenchymal prominence – development
of medial and nasal process- descent and movement of the process – concept of
premaxilla, primary palate, secondary palate – descent of tongue – fusion of
processes – mechanism involved – clinical significance of non-fusion – clefts
of maxilla – Diagrams Mandible: week of initiation in IUL – Meckel’s cartilage
formation – Place where it is found; cartilage of which arch; the week at which
it is formed – from which structure – forms which structures – at which week –
how it acts as a scaffold for the mandible and the persistence of the cartilage
in adult as the inner ear bones- how mandible develops from this including the
type of ossification – Growth of mandible – development of lingual, nerve innervation’s and blood supply
Development of mandible:
Week of initiation in IUL – Meckel’s cartilage
formation – Place where it is found; cartilage of which arch; the week at which
it is formed – from which structure – forms which structures – at which week –
how it acts as a scaffold for the mandible and the persistence of the cartilage
in adult as the inner ear bones- how mandible develops from this including the
type of ossification – Growth of mandible – development of lingual, nerve
innervation’s and blood supply – Diagrams
formation – Place where it is found; cartilage of which arch; the week at which
it is formed – from which structure – forms which structures – at which week –
how it acts as a scaffold for the mandible and the persistence of the cartilage
in adult as the inner ear bones- how mandible develops from this including the
type of ossification – Growth of mandible – development of lingual, nerve
innervation’s and blood supply – Diagrams
Development of middle
third of face:
third of face:
4th week IUL – facial prominence’s – 1st pharyngeal arches appear – Maxillary prominence – mandibular prominence – frontonasal prominence – nasal (olfactory) placodes – nasal pits – nasal prominence – lateral – medial – nasolacrimal groove – nasolacrimal duct- lacrimal sac – formation
of cheeks and maxilla. Nose- 5 facial prominence’s – the frontal – medial nasal prominence – lateral nasal prominence.
Skin development – innervation’s – Reichert Cartilage – Diagrams
of cheeks and maxilla. Nose- 5 facial prominence’s – the frontal – medial nasal prominence – lateral nasal prominence.
Skin development – innervation’s – Reichert Cartilage – Diagrams
Derivatives of second
pharyngeal arch:
pharyngeal arch:
Hyoid arch- Reichert’s cartilage-
stapes, styloid process of the temporal bone, stylohyoid ligament, and ventrally,
the lesser horn and upper part of
the body of the hyoid bone. Muscles of the hyoid arch – stapedius, stylohyoid, posterior belly of the digastric, auricular, and
muscles of facial expression. The facial nerve, the nerve of
the second arch, supplies all of these muscles. Diagrams
stapes, styloid process of the temporal bone, stylohyoid ligament, and ventrally,
the lesser horn and upper part of
the body of the hyoid bone. Muscles of the hyoid arch – stapedius, stylohyoid, posterior belly of the digastric, auricular, and
muscles of facial expression. The facial nerve, the nerve of
the second arch, supplies all of these muscles. Diagrams
Development of tongue:
4 weeks in the form of two lateral
lingual swellings and one medial
swelling, the tuberculum impar – first
pharyngeal arch – copula, or
hypobranchial eminence – a
third median swelling, formed by the posterior part of the fourth arch – laryngeal orifice – relationship with arytenoid
swellings – lateral
lingual swellings – increase in size – tuberculum impar and merge – body of the
tongue. Tongue mucosa – from the first pharyngeal arch – sensory innervation’s – terminal sulcus. Root of
tongue and the 2nd, 3rd and 4th pharyngeal
arch. tongue muscles – myoblasts – occipital
somites – hypoglossal nerve. Sensory, motor and taste supply to tongue. Two
diagrams.
(A Special Thanks to Colleagues at Ragas Dental College & Hospital, Chennai)
lingual swellings and one medial
swelling, the tuberculum impar – first
pharyngeal arch – copula, or
hypobranchial eminence – a
third median swelling, formed by the posterior part of the fourth arch – laryngeal orifice – relationship with arytenoid
swellings – lateral
lingual swellings – increase in size – tuberculum impar and merge – body of the
tongue. Tongue mucosa – from the first pharyngeal arch – sensory innervation’s – terminal sulcus. Root of
tongue and the 2nd, 3rd and 4th pharyngeal
arch. tongue muscles – myoblasts – occipital
somites – hypoglossal nerve. Sensory, motor and taste supply to tongue. Two
diagrams.
(A Special Thanks to Colleagues at Ragas Dental College & Hospital, Chennai)