Chapter 13 Facial Bones Part 1

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 __________________ 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 ________________ Majority of nose ________________ Positioning landmark superior to nasal bone fusion Majority of nose ________________

Nasal Septum Bony Septal cartilage anterior _____________- - _____________ 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 PA Caldwell Waters Lateral 70 – 80 kVp 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

Waters Parietoacanthial 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 kVp Laterals 50 – 60 kVp 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 kVp BONE TECHNIQUE

AP Towne Zygo Supine Tuck chin so ________________to IR Angle CR ____________ Or Tuck chin so _______________and angle ________ Center ________________to pass through mid arches

SMV Submentovertex 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