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Published byHarry Summers Modified over 9 years ago
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Bones and structures of the neurocranium
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Anterior Skull frontal bone supraorb ital foramen zygomatic bone maxill ary bone alveolar fossa infraorbit al foramen glabella mental foramen mandible mandibu lar symphys is
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Anterior Skull nasal bone perpendicularplate middle nasal concha vomer bone superior orbital fissure inferior nasal concha bone concha bone
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Paranasal Sinuses frontal sinus ethmoid sinus maxilary sinus sphenoid sinus
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Ventral Skull palatine process palatine bone vomer bone mastoid process styloid process external occipital protuberance sphenoid bone temporal bone occipital bone
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Lateral Skull lacrimalbone temporalbone squamosalsuture mandibular condyle In mandibular fossa (TMJ joint) external acoustic meatus
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angle coron oid proces s zygomatic arch mastoid process styloid process sphenoidbone body ramus mandible Lateral Skull sutur al bone
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Hyoid bone temmporalmandibularjoint externalacousticmeatus Hyoid +
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________________ ________Sagittal
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Coronal Lambdoid Squamous
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Overview of Skull Geography Facial bones form the anterior aspect The cranial bones enclose the brain
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Vault The cranial vault or calvaria forms the superior, lateral, and posterior aspects of skull The cranial base forming the inferior aspect of skull
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Facial bones Consists of 14 bones w/ only mandible and vomer unpaired Others include maxillae, lacrimals, nasals, zygomatics, inferior nasal conchae, and palatines (not pictured)
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Mandible Forms the lower jaw Largest, strongest bone of the face It has a body and two upwardly projecting sections called rami Houses lower dentition
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Mandible - landmarks Mandibular angle Mandibular notch Coronoid process Mandibular condyle Alveolar margin Mandible formina Mental formina Ramus of mandible
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Maxillary bone Forms upper jaw and central portion of facial skeleton Fused medially Articulates with all facial bones except mandible Upper dentition Forms 2/3 of hard palate of the mouth Maxillarybone Zygomaticprocess
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Maxillary bones - landmarks Alveolar margin –Upper dentition Frontal process –Forms lateral aspects of nose Zygomatic process –Articulates with zygomatic bone Maxillary sinuses –(Fig. 7.11)
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Palatine bones The horizontal plates forms the posterior portion of hard palate Vertical plate forms part of the posterolateral wall of nasal cavity and a small portion of orbit
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Palatine bones - landmarks Horizontal plate –Posterior section of hard palate Vertical plate –Part of the posteriolateral walls of nasal cavity Orbital surface –Part of inferior medial aspect of orbit
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Vomer Forms part of the nasal septum Discussed with the nasal cavity
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Vomer - landmarks Plow shape –Divides nasal septum into right and left parts
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Inferior Nasal Conchae - Landmark The Inferior nasal conchae is just one of three in the nasal cavity Superior and middle concha are on the Ethmoid bone
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The Orbits
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Paranasal sinuses Note positioning around nasal cavity
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Paranasal sinuses Sphenoid sinus Frontal sinus Ethmoid sinus Maxillary sinuses
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Hyoid bone Body –Neck muscle attachment Greater horn –Neck muscle attachment Lesser horn
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TMJ
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TMJ Motions
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The Skull: Fractures Another example of an egg shell fracture.
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