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MANDIBLE, SINUSES, TEMPORAL BONE

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MANDIBLE, SINUSES, TEMPORAL BONE

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  1. MANDIBLE, SINUSES, TEMPORAL BONE Wynn Harrison, MEd

  2. NEW WORDS • Sinusitis: Inflammation of the sinuses • Mucocele: Enlargement of the lacrimal sac. Cystic disease of the air cavities – causes erosion of the bone

  3. Retention Cyst: A cyst retaining the secretion of a gland, ie: mucosal or sebaceous cyst Mastoiditis: Inflammation of the mastoid sinus

  4. Otitis: Inflammation of the ear: ie: otitis media; can be internal or external • Acoustic Neuroma: benign tumor of the eighth cranial nerve. Symptoms = hearing loss, pain, headache, balance problems.

  5. Mandible

  6. AP Axial (Townes) • OML = 30 degrees • IOML = 37 degrees • Center mid-ramus

  7. OML perpendicular to IR Center mid-mandible PA Mandible

  8. Head tilt 15 degrees CR 15 degrees cephalic Axiolateral Mandible

  9. SMV Mandible • IOML parallel to IR and perpendicular to CR. • Image mentum skimming frontal bone • Merrill’s p. 389-390

  10. Temporomandibular joints

  11. Relaxed Lateral with 15 degree caudal angulation Merrill’s p. 396 Cone-Down of TMJ

  12. Schullers Projection • The Schullers Projection can be used to evaluate the temporal mandibular joints and mastoid air cells and inner ear.

  13. Schullers Protection for TMJ • Open and closed mouth view are taken of both TM joints. • The TMJ closest to the Bucky will be the one seen at the center or top of the film. • Accurate positioning is essential to being able to compare joints.

  14. TMJ Syndrome • Clicking, pain in TMJ • May indicate dysfunction of the TMJ • Caused by inflammation, stress, muscle spasm, etc.

  15. Paranasal Sinuses

  16. Lateral Sinus

  17. Sinuses: Caldwell Frontal Ethmoid Maxillary

  18. Water’s view (sinuses) Maxillary Sinus Petrous Pyramids

  19. What sinuses can you see?

  20. Waters Projection • Waters projection demonstrates: • Cloudy maxillary sinuses worse on left. • Sinus infection that needed antibiotics.

  21. SMV - Sinuses • Demonstrates sphenoid sinus • Merrill’s p. 418

  22. Temporal Mandibular Bone • Law Method • Shuller Method • Stenver’s Method • Arcelin Method • Mayer Method • Hickey Method

  23. These projections will not be on your boards … but review Merrill’s p 430-452

  24. PATHOLOGY

  25. Fracture to Mandible and Zygomatic Arches

  26. Mandibular Ramus Fracture

  27. Bilateral Fractures of the Mandible

  28. Film critique

  29. Critical thinking