Facial Bones
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Transcript of Facial Bones
![Page 1: Facial Bones](https://reader035.fdocuments.net/reader035/viewer/2022062304/56812a48550346895d8d8bc9/html5/thumbnails/1.jpg)
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](https://reader035.fdocuments.net/reader035/viewer/2022062304/56812a48550346895d8d8bc9/html5/thumbnails/2.jpg)
Nasal Bones
• Together, form the bridge of the nose
![Page 3: Facial Bones](https://reader035.fdocuments.net/reader035/viewer/2022062304/56812a48550346895d8d8bc9/html5/thumbnails/3.jpg)
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](https://reader035.fdocuments.net/reader035/viewer/2022062304/56812a48550346895d8d8bc9/html5/thumbnails/4.jpg)
Maxilla Bones
• Maxillary Sinuses: largest sinuses
![Page 5: Facial Bones](https://reader035.fdocuments.net/reader035/viewer/2022062304/56812a48550346895d8d8bc9/html5/thumbnails/5.jpg)
Lacrimal Bones
• Front part of the medial orbit wall
• Between the maxilla and ethmoid bones
• House nasolacrimal ducts (tear ducts)
![Page 6: Facial Bones](https://reader035.fdocuments.net/reader035/viewer/2022062304/56812a48550346895d8d8bc9/html5/thumbnails/6.jpg)
Zygomatic Bone
• Forms:– prominence of cheek– Part of lateral wall and
floor of orbit
![Page 7: Facial Bones](https://reader035.fdocuments.net/reader035/viewer/2022062304/56812a48550346895d8d8bc9/html5/thumbnails/7.jpg)
Palatine Bones
• Form:– Posterior hard palate– Floor & lateral wall of
nasal cavity– Floor of orbit
• Affected with a cleft palate
![Page 8: Facial Bones](https://reader035.fdocuments.net/reader035/viewer/2022062304/56812a48550346895d8d8bc9/html5/thumbnails/8.jpg)
Inferior Nasal Conchae
• Projections in lateral wall of nasal cavity
• Support mucous membranes– Warm, moisten, filter
air
• Increase surface area
![Page 9: Facial Bones](https://reader035.fdocuments.net/reader035/viewer/2022062304/56812a48550346895d8d8bc9/html5/thumbnails/9.jpg)
Vomer
• Thin flat bone in medial plane
• Along with ethmoid, forms the nasal septum
![Page 10: Facial Bones](https://reader035.fdocuments.net/reader035/viewer/2022062304/56812a48550346895d8d8bc9/html5/thumbnails/10.jpg)
Mandible
• Lower Jaw
• Largest and strongest bone of face
• Only movable bone of skull
• Houses lower teeth
![Page 11: Facial Bones](https://reader035.fdocuments.net/reader035/viewer/2022062304/56812a48550346895d8d8bc9/html5/thumbnails/11.jpg)
Mandible
• Mandibular Condyle: articulates with temporal bone
• Coronoid Process: site of attachment for mastication muscles- protrudes when jaw is depressed
![Page 12: Facial Bones](https://reader035.fdocuments.net/reader035/viewer/2022062304/56812a48550346895d8d8bc9/html5/thumbnails/12.jpg)
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](https://reader035.fdocuments.net/reader035/viewer/2022062304/56812a48550346895d8d8bc9/html5/thumbnails/13.jpg)
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