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Facial Bones

Facial Bones. Nasal Bones (2) Maxilla Bones (2) Lacrimal Bones (2) Zygomatic Bones (2) Palatine Bones (2) Inferior Nasal Conchae (2) Vomer Mandible. Nasal Bones. Together, form the bridge of the nose. Maxilla Bones. Form: Upper jaw Anterior roof of mouth (hard palate)

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Facial Bones

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  1. Facial Bones • Nasal Bones (2) • Maxilla Bones (2) • Lacrimal Bones (2) • Zygomatic Bones (2) • Palatine Bones (2) • Inferior Nasal Conchae (2) • Vomer • Mandible

  2. Nasal Bones • Together, form the bridge of the nose

  3. Maxilla Bones • Form: • Upper jaw • Anterior roof of mouth (hard palate) • Floor of eye socket(orbit) • Contain sockets for upper teeth

  4. Maxilla Bones • Maxillary Sinuses: largest sinuses

  5. Lacrimal Bones • Front part of the medial orbit wall • Between the maxilla and ethmoid bones • House nasolacrimal ducts (tear ducts)

  6. Zygomatic Bone • Forms: • prominence of cheek • Part of lateral wall and floor of orbit

  7. Palatine Bones • Form: • Posterior hard palate • Floor & lateral wall of nasal cavity • Floor of orbit • Affected with a cleft palate

  8. Inferior Nasal Conchae • Projections in lateral wall of nasal cavity • Support mucous membranes • Warm, moisten, filter air • Increase surface area

  9. Vomer • Thin flat bone in medial plane • Along with ethmoid, forms the nasal septum

  10. Mandible • Lower Jaw • Largest and strongest bone of face • Only movable bone of skull • Houses lower teeth

  11. Mandible • Mandibular Condyle: articulates with temporal bone • Coronoid Process: site of attachment for mastication muscles- protrudes when jaw is depressed

  12. Fontanelles • membraneous spaces between the skull bones of the fetus and infant where ossification is not complete. • Permit compression at birth • Skull bones are thin and flexible, so less easily broken • aka “soft spot” in infants

  13. Fontanelles • Complete ossification of fontanelles occurs by age 26 • Posterior closes by ~2 months • Sphenoid closes by ~ 3 months • Mastoid closes by ~ 1 year • Anterior closes ~end of 2nd year of life

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