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Extra-oral Imaging

Dental Radiography -- Principles and Techniques

Extraoral Images - placed outside the mouth during xray exposure - most common is pano
Purpose overall view of skull and jaws
Cephalostat pano xray tube head used in conjunction w special extension arm
Film - sizes vary - 5x7 or 8x10 or size 4 occlusal receptor
Grid -used to reduce amount of scatter radiation that reaches extraoral film during exposure -decrease film fog and increase contrast
Lateral Jaw Imaging - examine post region of MD - useful in kids, PT w limited jaw movement
Lateral Jaw Imaging -- Body of MD eval impacted teeth, fractures, and lesions
Lateral Jaw Imaging -- Ramus of MD - eval impacted 3rd molars, lg lesions, fractures extend past ramus
Skull Imaging examine bones of the face and skull - used in oral surgery and ortho
Lateral Cephalometric Projection - eval fcaial growth and development, trauma, and disease - bones of face/skull, soft tissue profile of face
Postanterior Projection - eval facial growth and development, trauma and disease - frontal and ethmoid sinuses, orbits, and nasal cavity
Waters Projection - eval MX sinus, frontal and ethmoid sinuses and nasal cavity
Submentovertex Projection - ID posi of condyles, base of skull, eval fractures in zygomatic - Sphenoid and ethmoid sinuses, lateral wall of MX sinus
Reverse Towne Projection - ID fractures of condylar neck and ramus area
TMJ Imaging - arthrography of MRI must b used to examine this area - transcranial projection and TMJ tomography used
Transcranial Projection (Lindblom Technique) eval superior surface of condyle and articular eminence - Used to eval movement
TMJ Tomography examine TMJ
Created by: summerbradley