22 bones (excluding ossicles of ear)
Bones attached by sutures (immovable) and make up the cranium
Cranium: Upper part, surrounds cranial cavity
Facial Skeleton: Lower ant. part
Calvaria: Paired Temporal bones, Paired Parietal bones, Frontal, Sphenoid, Ethmoid and Occipital bones.
Facial: Paired Nasal bones, Paired Zygomatic bones, Paired Palatine bones, Paired Lacrimal bones, Paired Maxillae, Paired Inter Nasal Conchae and Vomer.
MANDIBLE = NOT PART OF CRANIUM OR FACIAL SKELETON
Skull Anatomy: Inferior View
> Frontal Bone
> Supraciliary Arches
> Supra-orbital Foramen/notch
>Zygomatic process of Frontal Bone
> Frontal Process of Zygomatic Bone
Zygomatic and Nasal Bones:
Lower lateral rim of orbit and lateral part of inferior rim of orbit = formed by Zygomatic Bone
> Frontal Nasal Suture (formed by articulation of nasal bones)
> Frontal Process of Maxilla
> Piriform Apenture
> Nasal Crests
> Nasal Septum
> Anterior Nasal Spine
> Paired Inferior Nasal Conchae
Mandible: External Surface Lateral View
Mandible: Internal Surface
Most inferior structure in ant. view of skull
Consists of: Body (ant.) and Ramus (post) - these 2 meet at angle of mandible
Body: > Lower Part: base - has midline swelling (mental protuberance) where 2 left and right sides meet. >Upper part: Alveolar segment (contains teeth and tooth sockets)
Mental foramen: visible between upper and border, between 1st and 2nd premolars, openings on ext. surface, passage for mental nerves and blood vessels.
Oblique Ridge: passes from ramus onto body, point of attachment for muscles that depress lower lip.
Condyler Process: Involved in articulation of mand. w/ glenoid fossa and temporal bone.
Coronoid Process: Thin upward projections on ant. surface of ramus, attachment for temporalis muscle
Mandibular Notch: Depress between coronoid processes and condyles
Mandibular Foramen: Opening on inner surface of body, allow passage of Alveloar nerves and blood vessels.
Lingula: Attachment for mandibular end of Sphenomandibular ligament
Mandibular Symphasis: Verticle midline fusion between 2 embryonic ossification centers (form body).
Rami: Flattened, projected upwards
Angle: Where body joins ramus
Maxilla: Medial Frontal view
Part of face, between orbit and upper teeth
Upper jaw is formed by: Paired Maxillae
Contribute superiorly to inferior and medial rims of orbit
Zygomatic process = articulates with Zygomatic bone (medially)
Frontal process = articulates with frontal bone
> Body of Maxilla
> Infra Orbital Foramen
> Alveolar Process