facial bones

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

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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. MaxillaBones. Form: Upper jaw Anterior roof of mouth (hard palate) - PowerPoint PPT Presentation

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Page 1: 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

Page 2: Facial Bones

Nasal Bones

• Together, form the bridge of the nose

Page 3: Facial Bones

Maxilla Bones

• Form:– Upper jaw– Anterior roof of mouth

(hard palate)– Floor of eye

socket(orbit)

• Contain sockets for upper teeth

Page 4: Facial Bones

Maxilla Bones

• Maxillary Sinuses: largest sinuses

Page 5: Facial Bones

Lacrimal Bones

• Front part of the medial orbit wall

• Between the maxilla and ethmoid bones

• House nasolacrimal ducts (tear ducts)

Page 6: Facial Bones

Zygomatic Bone

• Forms:– prominence of cheek– Part of lateral wall and

floor of orbit

Page 7: Facial Bones

Palatine Bones

• Form:– Posterior hard palate– Floor & lateral wall of

nasal cavity– Floor of orbit

• Affected with a cleft palate

Page 8: Facial Bones

Inferior Nasal Conchae

• Projections in lateral wall of nasal cavity

• Support mucous membranes– Warm, moisten, filter

air

• Increase surface area

Page 9: Facial Bones

Vomer

• Thin flat bone in medial plane

• Along with ethmoid, forms the nasal septum

Page 10: Facial Bones

Mandible

• Lower Jaw

• Largest and strongest bone of face

• Only movable bone of skull

• Houses lower teeth

Page 11: Facial Bones

Mandible

• Mandibular Condyle: articulates with temporal bone

• Coronoid Process: site of attachment for mastication muscles- protrudes when jaw is depressed

Page 12: Facial Bones

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

Page 13: Facial Bones

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