Facial Bones Flashcards
Forms the floor of the orbits, the medial parts of the infra-orbital borders, lateral wall of the nasal fossae, the floor of the nasal cavities, part of the roof of the mouth and most of the cheeks.
Maxilla or upper bone
is large that forms part of the
cheek and lies laterally to the nose.
Body of the maxilla
is a large
cavity in the body of each maxilla. Each open into the
nose and contains air.
Maxillary Sinuses (Antra of Highmore)
extends laterally from the body
to meet the maxillary process of the Zygomatic
bone.
Zygomatic process
extends
down from the body to
accommodate the upper teeth.
Alveoli process
Is a flat plate that extends medially above the mouth and form the anterior part of the Hard Palate.
Palatine process
is a ridge of bone forming the inner
part of the lower border of the opening of the orbit.
Intra orbital border
is an opening in
the body of the maxilla just below the
infra-orbital margin of each orbit.
Infra orbital foramen
is a small pointed
projection in the midline at the base of the nasal septum.
Anterior Nasal Spine / Acanthion
a small bony prominence
behind the last upper molar.
Maxillary Tuberosity
PARTS OF THE MAXILLA
Body of the maxilla Maxilla sinuses Zygomatic process Palatine process Alveoli process Infra-orbital borders Infra-orbital foramen Anterior nasal spine/acanthion Maxilla tuberosity
Forms the prominent part of the upper cheek and can be felt immediately
below the orbit.
Zygomatic bone or malar bone
Forms the bridge of the nose which are thin plates of bone that articulate
with the frontal bone and extend down to end the nasal cartilage.
Nasal bone
are small four-
sided flat bones that lie on the
medial borders of the orbits
close to the front.
Lacrimal bone
Are small “L”
shaped structure lying
behind the nasal cavity.
Palatine bone
Is a thin curve bone extending medially from the lateral wall of the nasal cavity.
INFERIOR CONCHAE or TURBINATES
Is flat and shaped like a “Ploughshare” that lies vertically and helps to form the
Nasal Septum where its lower border rests upon the upper surface of the Hard
Palate.
Vomer
Is shaped like a Horseshoe with its posterior ends turned up on each side to articulate with the Temporal bone forming the “Temporo-Mandibular Joint” (TMJ).
Mandible
s the
prominent rounded part where the horizontal
parts turns up to become the vertical part.
Angel of the mandible/gonion
is the horizontal part extending from the
angle on one side and back to the angle on the
other side.
Body
are flattened parts
extending from the angles up to the joints with the Temporal bone.
Rami (Sing- Ramus)
is a
faint ridge running vertically in the
midline where the two halves of the mandible
fused to form one bone.
Symphysis Mentis/Mandibular symphysis
is the prominence at the lower border of the
Symphysis Mentis and is called the “Chin”.
Mental protuberance
a small opening on the outer surface of the body below the
Second premolar tooth on each side wherein the mandibular nerve passes out to
the face.
Mental foramen