Chapter 7 Bones of the Cranium. Anatomical references Process raised area / projection of bone Fossa...
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Transcript of Chapter 7 Bones of the Cranium. Anatomical references Process raised area / projection of bone Fossa...
Chapter 7Bones of the Cranium
Anatomical references Process
raised area / projection of bone
Fossa low area / depressed
area of bone Suture
aka Fibrous joint Immovable joints of
the skull
Sinus aka (paranasal
sinuses) (4 pair) hollow space in bone
Makes mucus Contributes to the
sound of your voice Makes bones lighter
Foramen hole through bone Blood vessels and
nerves pass through
Skull Bones
22 total Cranial bones. 8 of the ‘skull’ 14 of the ‘face’
Skull bones Frontal bone
1 bone Forms forehead Frontal sinus
Skull bones Parietal
2 bones Form the top sides
of the skull fontanel
Aka ‘soft spot’ Where frontal bone
and parietal join
Skull bones Occipital bone
1 bone Forms the back
and posterior base of the skull.
Foramen magnum Largest foramen of
the body Spinal cord passes
through
Skull bones
Sphenoid bone 1 bone Forms the anterior
base of the skull Lower anterior of
the side of the skull
Sphenoid sinus ‘bat wing’ shaped
Sphenoid →
(inferior)
Skull bones Ethmoid bone
1 bone Forms inner eye
socket Separates nasal
cavity from brain Ethmoid sinus
Many small sinuses Honeycomb Swiss cheese
Skull bones Temporal bone
2 bones Forms the lower
sides of the head. TMJ
Temporomandibular joint
Temporal bone articulates w/ the mandible
Ears are attached
Temporal bone Landmarks
Mastoid process Styloid process External auditory
meatus Temporal fossa Glenoid fossa Articular
eminence
Facial bones Nasal bone
2 bones Forms the bridge of the
nose Vomer bone
1 bone Forms part of floor of
nasal cavity Nasal septum attaches
Inferior nasal conchae 2 bones Divided into superior,
middle and inferior
Facial bones Lacrimal bone
2 bones Forms outer part
of the eye socket Ethmoid bone
forms the inner part of the eye socket.
Tear ducts pass through
Facial bones Zygomatic bone
Aka zygoma 2 bones Forms the cheek Sides of the eye
socket ‘cheek’ bones
Facial bones Maxilla
2 bones Forms the
upper jaw face anterior of hard
palate Largest of the
facial bones
Facial bones Landmarks of the
Maxilla Median palatine
suture Infraorbital
foramen Incisive foramen Alveolar process
Bone that supports the teeth
Maxillary sinus
Facial bones Palatine bone
2 bones Forms the
posterior of the hard palate.
Floor of the nasal cavity
Transverse palatine suture
Greater palatine foramen
Lesser palatine foramina (plural)
Facial bones Mandible
Only moveable bone of the face.
Strongest bone 1 bone (starts as
2) ½’s join at the
mandibular symphysis
NO suture
Landmarks Mental foramen Mandibular
foramen Lingual foramen Ramus (rami) Condyloid process
TMJ Alveolar process Retromolar area
Facial bones
TMJ Temporomandibul
ar joint Temporal bone
articulates with the mandible.
Synovial joint Hinge/glide action
TMD Disorder /
dysfunction
Landmarks Bony
Condyloid process Articular eminence Glenoid fossa
Soft tissue Meniscus
Articular disc Capsular ligament
TMJ
Conclusion Knowing the bones of the head,
face, and skull is an important part of your job.
Understanding the facial bones, their landmarks and how they relate to dentistry will make you more valuable to your dentist.
Any questions???????