MDS PREP
The sialographic appearance of a normal salivary gland is
1. Branching with bloom
2. Branching with leaves
3. Branchless with fruit-laden
4. Branchless with leaves
Radiology
Answer: 1
The sialographic appearance of a normal salivary gland is branching with bloom.
Lateral cephalogram is used for all of the following except
1. To assess where excessive growth is occuring
2. To compare the growth patterns with previous radiograph
3. To assess level of posterior alveolar bone
4. To assess soft tissue profile
Radiology
Answer: 3
A lateral cephalogram is used to assess the level of posterior alveolar bone.
Higher kVp is
1. Disadvantageous to film
2. Disadvantageous to patient
3. Advantageous to film
4. All of the above
Radiology
Answer: 1
Higher kVp is disadvantageous to film.
Cervical burnout refers to
1) Cementoenamel junction misidentified as caries
2) Sun burns caused on neck
3) Root surface caries at cementoenamel junction
4) None of the above
Radiology
Answer: 1
Explanation: Cervical burnout is an optical illusion that occurs on dental radiographs, where the area around the cementoenamel junction appears darker due to the difference in density between the enamel and the underlying dentin. This can lead to misinterpretation as caries.
Quality of x-ray beam is dependent on which component of dental unit
1. Autotransformer
2. Ammeter
3. Temperature of cathode filament
4. Step-down transformer
Radiology
Answer: 1
Quality of the x-ray beam is dependent on the temperature of the cathode filament.
Medially displaced condylar neck fracture is best visulised in
1. PA view
2. Lateral oblique view
3. Occipitomental view
4. Submentovertex
Radiology
Answer: 1
Medially displaced condylar neck fracture is best visualized in PA view.
Overexposure of film results in
1. Increased density and dark film
2. Increased density and light film
3. Decreased density and light film
4. Decreased density and dark film
Radiology
Answer: 1
Overexposure of film results in increased density and dark film.
Internal derangement of the TMJ can be best diagnosed by
1. MRI
2. CT scan
3. Arthrography
4. Panoramic view
Radiology
Answer: 1
Internal derangement of the TMJ can be best diagnosed by MRI.