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