DMD - Doctor of Medicine in Dentistry Dental Radiology and Imaging Questions and Answers Flashcards
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Read the first 6 DMD - Doctor of Medicine in Dentistry Dental Radiology and Imaging Questions and Answers flashcards as text
Which intraoral radiographic view is best for evaluating the palate, floor of the mouth, or detecting salivary stones?
Answer: Occlusal radiograph
Occlusal radiographs use a larger film placed horizontally in the occlusal plane, enabling visualization of broader areas such as the palate, floor of the mouth, and calcified structures.
Which digital radiography system uses a phosphor plate that must be scanned by a laser to produce the image?
Answer: Photostimulable phosphor (PSP) system
PSP plates store latent X-ray energy and release it as visible light when scanned by a laser, making them reusable and flexible but requiring an extra scanning step.
What does the term 'elongation' describe in the context of radiographic image errors?
Answer: The image of the tooth appears longer than its actual length due to insufficient vertical angulation
Elongation occurs when the vertical angulation of the X-ray beam is too flat (insufficient), causing the projected image of the tooth to appear stretched or longer than reality.
A well-defined unilocular radiolucency associated with the crown of an unerupted tooth is most consistent with which lesion?
Answer: Dentigerous (follicular) cyst
A dentigerous cyst forms around the crown of an unerupted tooth by expansion of the dental follicle, presenting as a pericoronal radiolucency attached at the cementoenamel junction.
Which radiographic finding is pathognomonic for cementoblastoma?
Answer: Dense radiopaque mass fused to the root with a radiolucent rim
Cementoblastoma presents as a radiopaque mass that is fused to the root apex, surrounded by a characteristic thin radiolucent rim, which is considered pathognomonic.
What is the primary indication for prescribing a full mouth series (FMX) of radiographs for a new dental patient?
Answer: Comprehensive baseline assessment of all teeth, bone levels, and periapical regions
An FMX consisting of periapical and bitewing radiographs provides a complete radiographic examination of all teeth and supporting bone, serving as a baseline record for new patients.