MDS PREP
Filament in X-ray tube is heated by
1. Step-up high voltage transformer
2. Auto transformer
3. Step-down low voltage transformer
4. Ammeter
Radiology
Answer: 3
The filament in the X-ray tube is heated by the step-down low voltage transformer.
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.
Screen films differ form non-screen films in that
1. They are more sensitive to light than X-rays
2. They are more sensitive to X-rays than light
3. They are usually used in intraoral radiography
4. They do not need intensifying screens
Screen films differ from non-screen films in that they are more sensitive to X-rays than light.
Best radiograph for viewing # of maxillary bone
1. Submentovertex
2. PA view
3. Waters view
4. Towne"s projection
Radiology
Answer: 3
The best radiograph for viewing the maxillary bone is Waters view.
Edge enhancement effect is seen with
1. Xeroradiography
2. Scintigraphy
3. Stereoscopy
4. None of the above
Radiology
Answer: 1
Edge enhancement effect is seen with xeroradiography.
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.
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.
Characteristic of screen film used for cephalometric radiograph
1. High contrast, medium-speed
2. Low contrast, faster speed
3. Low contrast, wide latitude
4. High contrast, high speed
Radiology
Answer: 3
Characteristic of screen film used for cephalometric radiograph is low contrast, wide latitude.