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IODA2
EXTRAORAL DENTAL FILMS 2
| Term | Definition |
|---|---|
| What are extraoral dental films? X-rays taken outside the mouth to examine large areas of the skull and jaws. | |
| What is the most common extraoral radiograph? Panoramic radiograph (Panorex) | |
| What does a panoramic radiograph show? Entire maxilla, mandible, teeth, TMJ, and sinuses. | |
| What is a panoramic radiograph used for? Impacted teeth, orthodontics, fractures, and pathology. | |
| What is another name for a panoramic radiograph? Panorex | |
| What is a cephalometric radiograph? A lateral skull x-ray used in orthodontics. | |
| What is the main purpose of cephalometric films? Orthodontic diagnosis and growth assessment. | |
| What are the two types of cephalometric films? Lateral cephalometric and posteroanterior (PA). | |
| What does TMJ stand for? Temporomandibular Joint | |
| Why are TMJ radiographs taken? To evaluate jaw pain, clicking, and limited opening. | |
| What mouth positions are used for TMJ films? Open and closed mouth. | |
| What does the Waters projection show? Maxillary sinuses and orbit area. | |
| What is the Waters projection used for? Sinus disease and facial fractures. | |
| What does the Reverse Towne projection show? Condylar neck and mandibular condyles. | |
| What is the Reverse Towne projection used for? Condylar fractures. | |
| What does the Submentovertex (SMV) projection show? Base of skull and zygomatic arches. | |
| What is SMV used for? Zygomatic arch fractures. | |
| What is the purpose of lateral jaw projection? Detect fractures, lesions, and impacted teeth. | |
| What must patients remove before panoramic x-rays? Jewelry, glasses, and dentures. | |
| Is a thyroid collar used for panoramic x-rays? No. | |
| Why is the thyroid collar avoided in panoramic imaging? It can block important anatomy. | |
| Where should the tongue be during panoramic imaging? Against the roof of the mouth (palate). | |
| What happens if the tongue is not against the palate? A dark shadow or band appears. | |
| What happens if the patient moves during exposure? The image becomes blurry. | |
| What happens if the chin is too high? A flat smile line appears. | |
| What happens if the chin is too low? An exaggerated smile line appears. | |
| What happens if the patient slumps? A ghost shadow appears on the image. | |
| What is one advantage of extraoral films? Large area coverage. | |
| What is one disadvantage of extraoral films? Less detail than intraoral films. | |
| Are extraoral films good for detecting caries? No, intraoral films are better. | |
| What does PCTW stand for? P = Panoramic, C = Cephalometric, T = TMJ, W = Waters. | |
| What is the bite block used for in panoramic imaging? To position the teeth properly. | |
| What is the purpose of the head positioner? To stabilize the patient’s head. | |
| What is the function of the tubehead? To produce x-rays. | |
| What is the image receptor used for? To capture the radiographic image. | |
| What should the patient do with their lips during panoramic imaging? Keep lips closed. | |
| Why must the patient stay still during panoramic exposure? To prevent blur and distortion. | |
| What are extraoral films useful for besides teeth? Evaluating facial bones and jaws. | |
| Which extraoral radiograph is commonly used for orthodontics? Cephalometric radiograph. | |
| Which extraoral film shows the entire mouth in one image? Panoramic radiograph. |
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