MDS PREP
Image of a hair appears on a radiograph which was exposed in a cassette. The hair would have been located in all of the following to produce this image except in
1. On the front of the cassette
2. Between film and front intensifying screen
3. Between film and back intensifying screen
4. On the film during development
Radiology
Answer: 4
Image of a hair appears on a radiograph which was exposed in a cassette. The hair would have been located in all of the following to produce this image except on the film during development.
Arthroscopy of TMJ is useful in
1. Internal derangement
2. Fracture of condyle
3. Ankylosis
4. Hyperplasia
Radiology
Answer: 1
Arthroscopy of TMJ is useful in internal derangement.
Lateral skull view is used for viewing all of the following except
1. Medial wall and root of orbit
2. Nasal bone
3. Nasal septum
4. Calvarium and root of sinus
Radiology
Answer: 3
Lateral skull view is used for viewing all of the following except nasal septum.
Location and radiographic density make a talon cusp appear similar to
1) Delacerations
2) Concrescence
3) A supernumerary tooth
4) Dens in dente
Radiology
Answer: 3
1. Anodontia: This is the complete absence of teeth. It is a rare condition
where an individual fails to develop any teeth.
2. Oligodontia: This term is used when an individual has fewer teeth than the
typical dental formula, which is six incisors, two canines, two premolars, and
six molars in the permanent dentition (excluding the third molars or wisdom
teeth). The term "hypodontia" is often used synonymously with oligodontia, but
hypodontia can also refer to a broader range of conditions characterized by the
congenital absence of one or more teeth, whereas oligodontia is more
specifically the absence of six or more teeth.
3. Microdontia: This condition involves teeth that are smaller than normal. It
can affect either the primary or permanent dentition and may involve one tooth
or multiple teeth.
4. Dens in dente: This is a rare developmental anomaly where a tooth forms
within the dental crown of another tooth, typically in the form of a small
tooth-like structure. It is not a condition of tooth number but rather an
abnormality of tooth structure.
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.
One advantage of digital radiography is
1. All the teeth can be in a single film
2. Highly economical
3. The radiographic images are obtained immediately
4. None of the above
Radiology
Answer: 3
One advantage of digital radiography is that the radiographic images are obtained immediately.
Which of the following is called as basic "sectional" or "slice" radiography
1) Othopantomography
2) Cephalogram
3) Tomography
4) All of the above
Radiology
Answer: 3
Tomography is a diagnostic imaging method that is often referred to as basic
"sectional" or "slice" radiography. It involves taking a series of
two-dimensional images of a specific area or "slice" of the body, using a narrow
beam of radiation that passes through the body from multiple angles. These
images are then combined to create a detailed, cross-sectional view of the
internal structures, allowing for the visualization of the body without the
superimposition of structures outside the area of interest. This technique is
particularly useful for diagnosing conditions that may not be apparent on
standard X-rays.
Explanation of the other options:
1) Othopantomography: This is a type of panoramic radiography used to capture a
wide-angle view of the teeth, jaw, and other oral structures. While it does
produce an image of a "section" of the body, it is not typically referred to as
"sectional" or "slice" radiography in the same sense as tomography, as it does
not involve the same layering or cross-sectional approach.
2) Cephalogram: A cephalogram is a specific type of X-ray used in dentistry and
orthodontics to examine the soft tissues and bones of the face and head,
particularly the skull and jaw. It provides a two-dimensional, flat
representation of the head from the side view, and while it is a form of
radiography, it does not produce the layered or cross-sectional images that are
characteristic of tomography.
The bisecting angle technique is used to take
1. Bitewing radiographs
2. Periapical radiographs
3. True occlusal radiographs of the mandible
4. None of the above
Radiology
Answer: 2
The bisecting angle technique is used to take periapical radiographs.