chapter 11
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Chapter 11
Facial BonesPart 3
Facial Bones14 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
• __________________– 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 ConchaeTurbinates
• _______________________– 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• PA Caldwell• Waters• Lateral• 70 – 80 kV• 40” SID
PA Caldwell
• 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
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
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 ___________________
Imaging the Nasal Bone
Routine• Waters• Laterals• Waters 70 – 80 kV• Laterals 50 – 60 kV• 40” SID
Laterals
• Right and Left Lateral• Position as ____________• CR directed through ____________-• Tight collimation• Soft tissue technique
Imaging the Zygomatic Bones
Routine• AP Towne• SMV• Tangential (If Zygos not seen on SMV)• 50 – 65 kV• BONE TECHNIQUE
AP TowneZygo
• Supine• Tuck chin so ________________to IR• Angle CR ____________• Or Tuck chin so _______________and
angle ________• Center ________________to pass
through mid arches
SMVSubmentovertex
• 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
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