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Zygomatic Bone (Cheek Bone)

The zygomatic bone is also referred to as malar bone because it forms the visibility of the cheek that is termed mala in Latin.

Interactive Anatomical Interface

Highlight
Frontal
parietal
Temporal
Sphenoid
Zygomatic
maxilla
Nasal
Lateral cartilage
greater alar cartilage
Mandbile
thyrohyoid membrane
thyroid cartilage
cricoid cartilage
cricotracheal ligament
ANterior longitudinal ligament
teeth
cervical vertabrae
first rib
second rib

Highlight
Frontal
parietal
Temporal
Sphenoid
Zygomatic
maxilla
Nasal
Lateral cartilage
greater alar cartilage
Mandbile

Highlight
thyrohyoid membrane
thyroid cartilage
cricoid cartilage
cricotracheal ligament
ANterior longitudinal ligament
teeth
cervical vertabrae
first rib
second rib
Highlight
frontal
Parietal
Sphenoid
temporal
Zygomatic
Maxilla
stylomandibular ligament
Lateral cartilage
posterior atlantoaxial ligament
lateral ligament
greater alar cartilage
teeth
mandible
hyoid
occipital bone
first rib
posterior atlanto-occipital memebrane
thyrohyoid membrane
thyroid cartilage
ricothyroid membrane and ligament
cricoid cartilage
cricotracheal ligament
t1 vertebra
stylohyoid ligament
joint capsule
Anterior longitudinal ligamnent
nuchal ligament
Cervical Vertebra
lacrimal

Highlight
frontal
Parietal
Sphenoid
temporal
Zygomatic
Maxilla
Lateral cartilage
greater alar cartilage
mandible
hyoid
thyrohyoid membrane
thyroid cartilage
ricothyroid membrane and ligament
cricoid cartilage
lateral ligament
cricotracheal ligament

Highlight
stylohyoid ligament
Anterior longitudinal ligamnent
nuchal ligament
Cervical Vertebra
first rib
t1 vertebra
lacrimal
occipital bone
teeth
posterior atlanto-occipital memebrane
posterior atlantoaxial ligament
joint capsule
stylomandibular ligament
-
Highlight
nasal
temporal bone
occipital bone
Internal auditory meatus
Stylomastoid foramen
Temporal
sphenoid
ethmoid
zygomatic bone
zygomatic bone
lacrimal bone
perpendicular plate
lacrimal bone
nasal cartilage
vomer
Nasal concha
Mandible
tectorial membrane of atlanto-axial joint
foramen magnum
tectorial membrane
c1 atlas
crista galli
ethmoidal sinuses
cribriform plate
foramen rotundum
optic foramen
superior orbital fissure
palatine
nuchal ligament
c01 atlas
posterior atlantoaxial ligament
c2 axis
c03 vertebrae
c04 vertebrae
C5 vertebrae

Highlight
nasal
temporal bone
occipital bone
Stylomastoid foramen
Temporal
sphenoid
ethmoid
zygomatic bone
zygomatic bone
lacrimal bone
perpendicular plate
posterior atlantoaxial ligament
nasal cartilage
vomer
Nasal concha
palatine
tectorial membrane of atlanto-axial joint

Highlight
foramen magnum
tectorial membrane
c1 atlas
crista galli
lacrimal bone
Mandible
ethmoidal sinuses
cribriform plate
foramen rotundum
Internal auditory meatus
optic foramen
superior orbital fissure
nuchal ligament
c01 atlas
c2 axis
c03 vertebrae
c04 vertebrae
C5 vertebrae
-

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Parts

The zygomatic bone is composed of the following 3 parts:

  • A body
  • 2 processes: frontal and temporal.

Body

It presents 3 surfaces, viz. orbital surface, lateral surface and temporal surface.

  • A part of the lateral wall and floor of the Orbital surface. It’s a foramen, the zygomatico-orbital foramen, which carries a zygomatic nerve.
  • Lateral surface is subcutaneous and presents a zygomaticofacial foramen via which zygomatico-facial nerve comes out.
  • Temporal surface creates the part of anterior wall of the temporal fossa and presents a zygomaticotemporal foramen, which carries the zygomaticotemporal nerve.

Processes

All these are as follows:

  1. Frontal process: It’s a thick upward projection. It articulates with the zygomatic process of the frontal bone.
    Its orbital surface presents a small tubercle near the orbital margin and 1 cm below the frontozygomatic suture named Whitnall’s tubercle.
  2. Temporal process: It goes backwards and joins the zygomatic process of the temporal bone to create the zygomatic arch.

Clinical Significance

The powerful frontal process functions as a line of buttress for dispersion of force of impact to the frontal bone during mastication by the molar and premolar teeth.

The zygomatic bone ossifies in membrane. Occasionally a fissure divides the bone into upper and lower parts. This is a common attribute in the Mongolian race- making their malar prominences flat, for this reason it’s called OS Japonicum.


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By | 2018-02-14T10:07:40+00:00 July 24th, 2017|Anatomy, Bones and Cartilages, Head and Neck|0 Comments