The only way I could do that was if

1. Dr.Aditya
A SEMINAR ON
DEVELOPMENT OF
FACE

2.  INTRODUCTION
 DEFINITION
 EVENTS OF DEVELOPMENT
 EMBRYOLOGICAL DEVELOPMENT
 DEVELOPMENT OF BRANCHIAL (ARCHES ,
POUCHES AND CLEFTS)
 DEVELOPMENT OF FACE
 DEVELOPMENTAL ANOMALIES OF FACE
 CONCLUSION
 REFERENCES
CONTENTS

3. Third week Development of ear
Formation of Stomatodaeum.
Fourth week
Formation of Fronto-nasal process, maxillary and mandibular
process.
Development of cranial base.
Formation of pharyngeal arches.
Development of tongue.
Fifth week Formation of Nasal placode, Medial and lateral nasal process.
Development of mandible.
Sixth week Development of Nasal cavity.
Development of Parotid and Submandibular salivary glands
Seventh week Formation of pre-maxilla
Eight week Formation of definitive palate.
Development of Sublingual salivary glands
Tenth week Development of TMJ
Development of Maxillary sinus.
Twelth week Development of Ethmoidal, Frontal and Sphenoidal sinuses.

4. 1ST
WEEK OF DEVELOPMENT

5. -Fertilization of ovum takes place in the ampulla of
the uterine tube.
When there are 16 cells the ovum is called a
morula.
- - The cells of the inner cell mass rearrange to
form the embryonic disc having two germ cells
namely ECTODERM & ENDODERM and the third
layer is formed between the 2 layers i.e known as
MESODERM.
FORMATION OF GERM LAYERS

7. Cartilagenous components of various
arches

8. MUSCULAR COMPONENTS OF
PHARYNGEAL ARCHES

10. • The cheek is formed by the fusion of posterior part of
maxillary and mandibular process.
• The nose is derived from the frontonasal process.
• The nasal cavity is formed by enlargement of the nasal
pits.
• Paranasal sinuses appear as outgrowths from the nasal
cavity.
• The palate is formed by fusion of 3 components i.e
right and left palatal processes and the primitive palate.
• The oral cavity is derived party from the
stomatodaeum(ectoderm) and partly from the
foregut(endoderm).

14. - Anterior two-thirds of tongue forms by fusion of
– 2 lingual swellings & Tuberculum impar
- It is derived from Mandibular arch so supplied
by lingual nerve, branch of Mandibular nerve which is
post- trematic nerve of the 1st arch & chorda- tympani
which is pretrmatic nerve of the arch.
- Posterior one-thirds is formed from cranial part
of H.E (copula)
- The 2nd arch mesoderm buries below the
surface, 3rd arch mesoderm grows over it to fuse with
mesoderm of 1st arch.
- Thus it is formed by 3rd arch mesoderm.

16.  Single or multifactorial
HISTORICAL BACKGROUND

18. Kernahan’s stripped Y
classification:-

20. CROUZONS SYNDROME/CRANIOFACIAL
DYSOSTOSIS:-
C/F:-
 Premature closure, especially of coronal
suture, occasionally lambdoidal..
 Variable cranial form depending on order and
rate of progression of suture closure
 Optic nerve damage

21. C/F:
 under development of the zygomatic bones,
mandibular hypoplasia, down slanting palpebral
fissures, maformed external ears
 Autosomal dominant trait with 60% cases
TREACHER COLLIN SYNDROME

24.  Ankyloglossia
 Macroglossia
 Microglossia
 Aglossia
 Bifid tongue
 Fissured tongue
DEFECTS DURING DEVELOPMENT
OF TONGUE

27.  Small sphenoid bones.
 Midfacial hypoplasia with low nasal bridge, narrow high-arched
palate.
 Hypertelorism(abnormal increased distance between 2 organs or
body parts)
 small thorax with short oblique ribs.
Dentition:-
 Late eruption,
 Malformed roots,
 Retention cysts,
 Enamel Hypoplasia,
 Caries,
 Supernumerary teeth.

28. Atresia (is a condition in which a body orifice or passage
in the body is abnormally closed or absent) of the cavity at
the external nares, at the posterior nasal aperture or in
the cavity
 This may be unilateral or bilateral
 Congenital defect in the cribriform plate of ethmoid
bone may lead to communication between cranial cavity
and nose
 Nasal septum may not be in midline i.e., deflected to
one side
 Septum may be absent
 Nasal cavity may communicate with the mouth
DEVELOPMENTAL DEFECTS OF
NASAL CAVITIES

29. Illegal drugs
Marijuana:
prenatal exposure to marijuana leads to infants
reduced weight and size, short term changes in
behaviour e.g. increased startle and a high pitched cry.
Cocaine:
effect of maternal cocaine use - children tend to be
impulsive, highly distractable and difficult to control
and to have problems in language development as
they grow old.

30. The human face is a fascinating study of
physiology and psychology. The amount of
information a human face can relay is unending.
Humans are capable of making 10,000 unique
facial expressions! While the face is complicated,
it is also our most useful and most underestimated
tool for communication.
CONCLUSION : -