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Extra-oral Imaging
Dental Radiography -- Principles and Techniques
| Term | Definition |
|---|---|
| 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
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