Facial Bone Anatomy & Positioning ALERT Anterior Aspect of Facial Bones Palatine Bones Zygomatic Bones

Facial Bone Anatomy & Positioning ALERT Anterior Aspect of Facial Bones Palatine Bones Zygomatic Bones www.phwiki.com

Facial Bone Anatomy & Positioning ALERT Anterior Aspect of Facial Bones Palatine Bones Zygomatic Bones

Alexander, Bill, PM Drive-Time On-Air Personality has reference to this Academic Journal, PHwiki organized this Journal Facial Bone Anatomy & Positioning RTEC 233 Week 6 (FINAL) ALERT This version of the lecture is a “DRAFT”. Please do not print the lecture until you see “FINAL” on the first slide. Anterior Aspect of Facial Bones 6 paired facial bones 1) 2) 3) 4) 5) 6) 2 single bones 7) 8) 1 2 3 4 5 7 7 8

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Palatine Bones L-shaped bones — portion as long as ms posterior hard palate – portion extends between 1maxillae in addition to 1 pterygoid plate of sphenoid bone Articulates with 2 cranial bones in addition to 4 facial bones Zygomatic Bones Forms – Forms lower outer margin of – Articulates with 3 cranial bones 1) 2) 3) Articulates with maxillae

Inferior Nasal Cochae The only pair of conchae that are – facial bones Articulates with 1) 2) 3) 4) Covered with mucous membranes to: ——- Lacrimal Bones About the size & shape of a fingernail Lacrimal as long as amen as long as tear duct Lie anteriorly on the medial side of orbit Can be seen on PA in addition to lateral projections Articulates with 2 cranial bones in addition to 2 facial bones Nasal Bones Fused in addition to as long as m bridge of nose Vary in size considerably The point of junction with the frontal bone is the nasion Articulates with 2 cranial in addition to 2 facial bones

Vomer Forms inferosuperior part of nasal septum Deviated nasal septum Depressions as long as blood vessels Articulates with 2 cranial bones & 4 facial bones M in addition to ible Only – bone in the skull -& largest facial bone -bones at birth Contains — as long as amina Pathologic Indications as long as Facial Radiography Fractures Blowout Tripod LeFort Coutrecoup Foreign Body Osteomyelitis Neoplasms Secondary Osteomyelitis TMJ Syndrome

Sample Fractures Tripod Fractures Tripod Fracture

LeFort Fractures Le as long as t 2 Foreign Body

Osteomyelitis TMJ syndrome TMJ Syndrome

Positioning: Lateral Facial bones CR is perpendicular enters lateral zygomatic bone ½ way between outer canthus in addition to EAM. Lateral Facial Radiograph All facial bones in with zygomatic bone in center Almost SI m in addition to ibular rami SI orbital roofs (no tilt) No rotation of sella turcica Positioning: Waters CR perpendicular to exit acanthion

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Waters Radiograph Distance from lateral border of skull in addition to orbit equal on each side Petrous ridges projected immediately below maxillary sinuses Reverse Waters CR perpendicular in addition to enters acanthion Reverse Waters Radiograph Distance from lateral border of skull in addition to orbit equal on each side Petrous ridges projected immediately below maxillary sinuses

Modified Waters CR perpendicular in addition to exits acanthion Modified Waters Radiograph Petrous ridges projected immediately below the inferior border of the orbits Equal distance from lateral orbit to lateral skull on both sides PA Axial – Caldwell CR 15 caudal to exit nasion

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