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Chapter 13 Part 2

Chapter 13 Part 2. Mandible and Orbits. Mandible. Largest ____________ facial bone 2 parts _________ _________ Angle (Gonion). Mandibular Ramus. ________________ – ‘U’ shape at top of mandibular ramus ________________ – Anterior projection of mandibular notch ________________

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Chapter 13 Part 2

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  1. Chapter 13Part 2 Mandible and Orbits

  2. Mandible • Largest ____________ facial bone • 2 parts • _________ • _________ • Angle (Gonion)

  3. Mandibular Ramus • ________________ – ‘U’ shape at top of mandibular ramus • ________________ – Anterior projection of mandibular notch • ________________ – Posterior projection of mandibular notch • Condyle • Neck

  4. Mandibular Body • ________________ – Division of Right and Left • ___________________________ – Anterior projection (Chin) • ______________ – Center of mental protuberance • ______________ – Holes for nerves and blood vessels

  5. TMJTemporomandibular Joint • Only __________in the skull • Mandibular ________ and Temporomandibular ________ • Synovial / Diarthrodial • Hinge (Ginglymus) and gliding (Plane) movement

  6. Orbits • 7 bones • Rim • ___________ • Zygoma • ___________ • Posterior walls • Lacrimal • ______________ • ______________ • Palatine

  7. Orbit shape • Cone Shaped • Apex at _______________ • With OML parallel with the floor • _____________ • ____________mid sagittal

  8. Orbit openings • ______________ – Hole in sphenoid for optic nerve • ________________________ – Cleft between greater and lesser wing of sphenoid • _________________________ – Cleft between maxilla, zygo, and greater wing of sphenoid • _________________ – Separates superior orbital fissure and optic canal (for optic foramen)

  9. Imaging the Mandible Routine • PA • AP Towne • Axiolaterals • Lateral** • 70 – 80 kVp • 40” SID • Panorex

  10. PA Mandible • Prone • _______________on table • ____________perpendicular to IR • Have pt close mouth • CR to exit __________________- • Remember can be done AP

  11. AP Towne • Supine • ________________to IR • Angle CR _________ • Center at level of _______________

  12. Axiolateral • Right and left • Position pt in ____________ • ____________toward IR • Midsagittal plane to form __________ • Center through mid mandibular body • If pt cannot tilt head angle CR

  13. Panorex • Special film and cassette • Position head in panorex with ____________to floor • No rotation • Instruct pt _______________ • ____________head in • Tube will rotate around pt • Entire Mandible seen _____________

  14. Imaging the TMJ • Law’s ___________mouth • Schuller’s ____________mouth • 70-80 kVp • 40” SID

  15. Law’s • Right and Left • Position in anterior oblique _________to be imaged • Place pt in true facial bone _________ • Rotate face ____________table • Angle CR ___________ • Center through downside TMJ • Do Closed and Open mouth

  16. Schuller’s • Right and Left • Position into anterior Oblique • Place pt into true facial bone lateral • Angle CR ______________ • Center to downside TMJ • Closed and Open mouth

  17. Imaging the Orbits Routine • Waters • Rhese • 70 kVp • 40” SID

  18. Rhese • Prone • Pt’s ____________________on table (3 points) • Rotate head _______________affected side • Mid sagittal plane will have a ____________ • __________________to IR • Center through downside Orbit • Optic foramen should be in ___________ aspect

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