Chapter 11
Facial Bones
Part 3
Facial Bones
14 Bones
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2 Maxillae
2 Zygomatic
2 Lacrimal
2 Nasal
2 Inferior nasal conchae
2 Palatine
1 Vomer
1 Mandible
Maxillary
• Largest _________________ facial bone
• Upper jaw
• __________
– Central portion lateral to nose
• __________________
– Superior projection off body lateral to nose
Maxillary
• __________________
– Lateral projection
• __________________
– Inferior spaces for upper teeth
• ____________________
– Hard palate (cleft palate location)
Maxillary
• Fused ________________to nose
• ____________________
– Anterior projection at fusion
• _____________
– Positioning landmark at base of anterior
nasal spine
Palatine
• ‘L’ shaped
• Vertical portion between _____________
of sphenoid
• Horizontal portion makes up
___________________________
Zygomatic
(Malar)
• Cheek bones
• Articulations
– ____________
– Temporal
– ____________
– Sphenoid
Zygomatic
• ______________________
– Prominent lateral portion
• _______________________
– Thin bone extending from zygomatic
prominence to temporal bone
Nasal
• 2 fused bones
• ________________
– Positioning landmark superior to nasal bone
fusion
• Majority of nose ________________
Nasal Septum
• Bony
- _____________ of ethmoid and _________
• Septal cartilage anterior
• _____________– Forms mid to inferoposterior nasal septum.
Nasal Conchae
Turbinates
• _______________________
– Bony projection from lateral wall of nasal
cavity projecting medially.
• __________________nasal conchae
– Extensions from ethmoid bone
Lacrimal
• Small facial bone
• Posterior to frontal process of maxilla
Imaging the Facial Bones
Routine
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PA Caldwell
Waters
Lateral
70 – 80 kV
40” SID
PA Caldwell
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Prone
Pt’s forehead and nose touching table
_______________to IR
No tilt or rotation
__________tube angle
CR to exit the ___________________
PA Caldwell cont’d
• ________________ should be in lower
3rd of orbits
• _______________of orbits should be
____________from lateral skull
• Shows Orbits, Petrious ridges, nasal
septum, frontal, maxillary sinus
Waters
Parietoacanthial
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Prone
Tip of pt’s _____________
OML forms ___________to IR
__________perpendicular
____________plane perpendicular
CR to exit __________
Shows majority of facial bones and sinuses
______________inferior to maxillary sinuses
Lateral
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Right or left depending on area of interest
Put area of interest ______________
Pt in ________________
Rotate head so ________________is
parallel
• _________________perpendicular
• ______ perpendicular to front of cassette
• CR at ___________________
Imaging the Nasal Bone
Routine
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Waters
Laterals
Waters 70 – 80 kV
Laterals 50 – 60 kV
40” SID
Laterals
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Right and Left Lateral
Position as ____________
CR directed through ____________Tight collimation
Soft tissue technique
Imaging the Zygomatic Bones
Routine
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AP Towne
SMV
Tangential (If Zygos not seen on SMV)
50 – 65 kV
BONE TECHNIQUE
AP Towne
Zygo
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Supine
Tuck chin so ________________to IR
Angle CR ____________
Or Tuck chin so _______________and
angle ________
• Center ________________to pass
through mid arches
SMV
Submentovertex
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Many ways to position
_______________to IR
______________perpendicular
CR through arches
Technique is soft tissue to visualize zygos
Tangential
• Position as ________
• Rotate and tilt head __________affected
side
• CR to “shave” Zygo arch