MDS PREP
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.
Bilateral asymptomatic cyst like radiolucent lesion in a 7-year-old boy at the angle of mandible may be diagnosed as
1. Cherubism
2. Paget"s disease
3. Fibrous dysplasia
4. Static bone cyst
Radiology
Answer: 1
A bilateral asymptomatic cyst-like radiolucent lesion in a 7-year-old boy at the angle of the mandible may be diagnosed as cherubism.
According to Clark"s rule for localisation of object if tube is shifted mesially to original angulation
1. Buccal objects move mesially
2. Lingual object moves mesially
3. Both buccal and lingual object move distally
4. Both buccal and lingual object move mesially
Radiology
Answer: 2
According to Clark's rule for localization of an object, if the tube is shifted mesially to the original angulation, the lingual object moves mesially.
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.
Fogging on the radiographs is the result of
1. Increase in humidity
2. Scattered radiation
3. Overdevelopment
4. All of the above
Radiology
Answer: 4
Fogging on the radiographs is the result of all of the above: increase in humidity, scattered radiation, overdevelopment.
Loss of lamina dura and ground glass appearance of bone is an early radiographic feature of
1. Osteogenesis imperfecta
2. Hyperparathyroidism
3. Osteopetrosis
4. Osteitis deformans
Radiology
Answer: 2
Loss of lamina dura and ground glass appearance of bone is an early radiographic feature of hyperparathyroidism.
In reverse Townes projection central X-ray passess through
1. Maxillary sinus
2. Occipital bone
3. Buperior border of petrous
4. Inferior border of petrous
Radiology
Answer: 2
In reverse Townes projection, the central X-ray passes through the occipital bone.
The best radiographic view for TMJ is
1. Lateral oblique
2. PA view
3. Waters view
4. OPG
Radiology
Answer: 4
The best radiographic view for TMJ is OPG.