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MANDIBLE, SINUSES, TEMPORAL BONE

MANDIBLE, SINUSES, TEMPORAL BONE. Wynn Harrison, MEd. NEW WORDS . Sinusitis : Inflammation of the sinuses Mucocele : Enlargement of the lacrimal sac. Cystic disease of the air cavities – causes erosion of the bone. Retention Cyst : A cyst retaining

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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. Mandible Projections • Axiolateral--head lat. position with tilt 15 degree to IR. 15 degree ceph angle of CR • PA skull-- CR at lips • Townes-- coned to Ramus • SMV of mandible

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

  8. Townes view for rami

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

  10. PA Mandible

  11. Nice axiolateral mandible

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

  13. SMV Mandible, (Shuller, full Axial view) • IOML parallel to IR and perpendicular to CR. • Image mentum skimming frontal bone • Merrill’s 12 th Ed. p. 351

  14. Temporomandibular joints

  15. Two types of Schuller views FIRST is full Axial (SMV) Second is true lateral with 15 degree Caudal angle (3 similar views: Henshen 15 degree caud. , Shuller 25 degree caud. , Lysholm 35 degree caud. angle)

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

  17. 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.

  18. Relaxed Lateral with 15 degree caudal angulation (Laws Position) Cone-Down of TMJ

  19. Open & closed mouth (Laws position)

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

  21. Paranasal Sinuses

  22. Lateral Sinus

  23. Sinuses: Caldwell Frontal Ethmoid Maxillary

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

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

  26. OPEN MOUTH WATERS FOR SINUSES: SHOWS SPHENOID SINUS IN OPEN MOUTH

  27. SMV - Sinuses • Demonstrates sphenoid sinus • Merrill’s p. 379 • 12th Ed.

  28. PATHOLOGY

  29. Occipital fracture

  30. Pencil in 4 yr. old orbit

  31. Spear exiting skull

  32. Girl 2 wks post shooting

  33. Mandibular Ramus Fracture

  34. fracture

  35. Fracture to Mandible and Zygomatic Arches

  36. Panerex--Bilateral Fracture Mandible

  37. Mastoid Positions not on test or Registry Not on test

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