MDS PREP
Zygomatic arch fractures are best viewed in
1. Occipitomental view
2. Lateral oblique
3. Submentovertex
4. Leteral view
Radiology
Answer: 3
Zygomatic arch fractures are best viewed in Submentovertex.
Fractures of middle third of the face can ve viewed in all except
1. Occipitomental view 10 degrees
2. Occipitomental view 30 degrees
3. Lateral skull view
4. PA view
Radiology
Answer: 4
Fractures of the middle third of the face can be viewed in all except PA view.
The anatomical structure of mandible commonly seen in periapical films of maxillary third molar region is
1) Coronoid process
2) Condylar process
3) Ramus mandible
4) Body of mandible
Radiology
Answer: 1
The coronoid process of the mandible may project into the maxillary third molar region on periapical radiographs when the patient opens their mouth wide. Other structures, like the condylar process or ramus, are less likely to overlap in this region.
Objects which cause attenuation of X-ray beam are shown as............in image
1. Radiolucent
2. Radiopaque
3. Gray
4. None of the above
Radiology
Answer: 2
Objects which cause attenuation of X-ray beam are shown as radiopaque in an
image.
Radiopaque materials absorb or block X-rays, leading to a reduced transmission
of the X-ray beam. This results in the appearance of white areas or shadows on
the X-ray image, indicating the presence of dense structures like bone, metal
restorations, or calculi. Radiolucent structures, on the other hand, allow
X-rays to pass through more freely, resulting in dark areas on the image.
Which of the following provides superior definition of soft tissues, bony details and physiologic information about the TMJ joint
1. MRI
2. Pantomograph
3. Arthrography
4. CT scan
Radiology
Answer: 3
The imaging technique that provides superior definition of soft tissues, bony details, and physiologic information about the TMJ joint is arthrography.
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.
Inventor of orthopantomographic machine is
1. Hounsfield
2. Roentgen
3. Kell
4. Namata
Radiology
Answer: 4
The inventor of the orthopantomographic machine is Namata.
Minimum percentage of cortical bone loss that should occur to be demonstrable in radiographic
1) 6.6 %
2) 13 %
3) 20 %
4) 30-40 %
Radiology
Answer: 2
Radiographic evidence of cortical bone loss typically becomes apparent when at least 13% of the bone height has been lost. This is because the density of the bone and the surrounding structures needs to be significantly altered to be detectable on an X-ray film.