1 / 15

Zygomatic Arches

Zygomatic Arches. Week 8. Zygomatic Arches: Anatomy. Prominent process called Zygomatic process Squamous portion of temporal bone: Projects anteriorly Articulates with zygoma. Common Projections for Zygomatic Arches. SMV Tangential: oblique inferosuperior Modified Towne: AP Axial.

wylie-rice
Download Presentation

Zygomatic Arches

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Zygomatic Arches Week 8

  2. Zygomatic Arches: Anatomy • Prominent process called Zygomatic process • Squamous portion of temporal bone: • Projects anteriorly • Articulates with zygoma

  3. Common Projections for Zygomatic Arches • SMV • Tangential: oblique inferosuperior • Modified Towne: AP Axial

  4. Indications • Fractures • Trauma • Neoplastic / inflammatory processes

  5. LeFort Fractures

  6. Isolated Zygomatic Arches

  7. Isolated Zygomatic Arch Fractures

  8. SMV for Zygomatic Arches • Seated or supine • IOML parallel with IR • MSP perpendicular • If supine: • Flex knees • Elevate trunk for full neck extension • Relax abdomen • CR perp to IOML and entering 1” posterior to outer canthi

  9. SMV Radiographfor Zygomatic Arches • Zygomatic arches free from overlying structures • No rotation as indicated by symmetric arches w/o foreshortening • Mandibular symphysis SI frontal bone

  10. Tangential Projection forZygomatic arches • Seated or supine • IOML parallel with IR • MSP 15 degrees toward side being examined • Tilt vertex 15 degrees away from side being examined • CR perp to IOML and centered to arch at a point 1” posterior to outer canthus

  11. Tangential Anatomy

  12. Tangential Radiograph for Zygomatic arches • Zygomatic arch free from overlying structures • Zygomatic arch not overexposed • Collimate tightly

  13. Modified Towne: AP Axialfor Zygomatic Arches • Seated or supine • MSP & OML perpendicular • CR to enter glabella approx 1” above nasion • OML: 30 caudad • IOML 37 caudad

  14. Modified Towne Anatomy

  15. Modified Towne Radiograph for Zygomatic Arches • No overlap of zygomatic arches by mandible • No rotation as evident by symmetric arches • Arches projected lateral to mandibular rami

More Related