chapter 11
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Chapter 11. Facial Bones Part 3 . Facial Bones 14 Bones. 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 __________________ - PowerPoint PPT PresentationTRANSCRIPT
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Chapter 11
Facial BonesPart 3
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Facial Bones14 Bones
• 2 Maxillae• 2 Zygomatic• 2 Lacrimal• 2 Nasal• 2 Inferior nasal conchae• 2 Palatine• 1 Vomer• 1 Mandible
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Maxillary• Largest _________________ facial bone
• Upper jaw
• __________– Central portion lateral to nose
• __________________– Superior projection off body lateral to nose
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Maxillary• __________________
– Lateral projection
• __________________– Inferior spaces for upper teeth
• ____________________– Hard palate (cleft palate location)
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Maxillary
• Fused ________________to nose
• ____________________– Anterior projection at fusion
• _____________– Positioning landmark at base of anterior
nasal spine
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Palatine
• ‘L’ shaped
• Vertical portion between _____________ of sphenoid
• Horizontal portion makes up ___________________________
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Zygomatic(Malar)
• Cheek bones
• Articulations– ____________– Temporal – ____________– Sphenoid
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Zygomatic• ______________________
– Prominent lateral portion
• _______________________– Thin bone extending from zygomatic
prominence to temporal bone
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Nasal
• 2 fused bones
• ________________– Positioning landmark superior to nasal bone
fusion
• Majority of nose ________________
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Nasal Septum
• Bony - _____________ of ethmoid and _________
• Septal cartilage anterior
• _____________-– Forms mid to inferoposterior nasal septum.
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Nasal ConchaeTurbinates
• _______________________– Bony projection from lateral wall of nasal
cavity projecting medially.
• __________________nasal conchae – Extensions from ethmoid bone
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Lacrimal
• Small facial bone
• Posterior to frontal process of maxilla
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Imaging the Facial Bones
Routine• PA Caldwell• Waters• Lateral• 70 – 80 kV• 40” SID
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PA Caldwell
• Prone• Pt’s forehead and nose touching table• _______________to IR • No tilt or rotation• __________tube angle• CR to exit the ___________________
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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
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WatersParietoacanthial
• 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
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Lateral• 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 ___________________
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Imaging the Nasal Bone
Routine• Waters• Laterals• Waters 70 – 80 kV• Laterals 50 – 60 kV• 40” SID
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Laterals
• Right and Left Lateral• Position as ____________• CR directed through ____________-• Tight collimation• Soft tissue technique
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Imaging the Zygomatic Bones
Routine• AP Towne• SMV• Tangential (If Zygos not seen on SMV)• 50 – 65 kV• BONE TECHNIQUE
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AP TowneZygo
• Supine• Tuck chin so ________________to IR• Angle CR ____________• Or Tuck chin so _______________and
angle ________• Center ________________to pass
through mid arches
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SMVSubmentovertex
• Many ways to position• _______________to IR• ______________perpendicular• CR through arches• Technique is soft tissue to visualize zygos
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Tangential
• Position as ________
• Rotate and tilt head __________affected side
• CR to “shave” Zygo arch